MysteryTwister C3
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Four levels

Four levels of increasing difficulty: From pen & paper to complex mathematical problems.

Limited attempts

You have only a limited number of attempts to solve each challenge. Be certain of your answer before you submit it.

Be fast

Be fast and earn a place on the Hall of Fame. The first four to solve each challenge will be displayed permanently.

Special Level X

The special level X contains cryptographic problems which are currently not known to have been solved.



Cipher challenges on four levels

 

Level I crypto challenges

Level I Challenges - Pen & Paper

Level I challenges are similar to crossword puzzles from newspapers and can be solved with little cryptographic background. You might not even need a computer for solving level I challenges — all you need is a bit of clever thinking and probably a pen and paper. A program like CrypTool applied to a level I challenge can help reveal the answer within minutes or even seconds, if the necessary algorithms are already built in. Hence, if you are new to cryptography, but nonetheless interested in the mysterious topic of cryptanalysis, give the level I challenges a try. You will almost assuredly meet quickly with success.
 
Level II crypto challenges

Level II Challenges - Programming skills required

Level II challenges require some background knowledge in cryptology and usually some computational power. Additionally, you may require tools that are not available in such convenient packages like CrypTool, OpenSSL or Sage. Therefore, you must first thoroughly understand the problem in order to write a computer program, which helps you getting along. It could take hours or even days to solve a level II challenge. Hence, if you consider yourself well-armed with cryptologic knowledge (such as if you are a university student in a cryptographic course), give the level II challenges a try. Success may not come easily, but it will be a worthwhile endeavor.
 
Level III crypto challenges

Level III Challenges - Extensive computing power recommended

Level III challenges require a thorough background in cryptanalysis and usually significant computational power as well. The problems in this level represent current research topics that are believed to be very difficult to solve. Thus, practical solutions may not even exist and ready-to-run tools almost certainly do not. The methodology to solve some of these challenges may already be known, but it may require such a huge amount of computational power that only a large group of people working together in a distributed system could obtain the solution. Challenges in this category mark the thin line between algorithms that are still secure and those that are not. Solving them may take weeks or even several months. Hence, challenges in this level are intended for entire research groups with many experts in cryptanalysis, programming, and distributed systems. Success cannot be guaranteed, but if you are the first to successfully solve one of these challenges, it probably would catch the attention of the scientific community. Of course, it still remains up to you to publish or present any such scientific techniques and results.
 
Level X crypto challenges

Level X Challenges - Unsolved ciphers

Most level X challenges contain problems that have remained unsolved for a long time. The fact that they have been unsolved regardless of numerous attempts suggests these challenges being hard. However, a simple idea can probably reduce the difficulty of it to a simple level I challenge — currently it is just unknown if and how they can be solved. Of course such a challenge cannot be solved with a simple codeword, since even we (the respective author and the MTC3 team) do not know the solution (the plaintext, the original message or the approach). So if you discover a promising solution you should either contact the author or the MTC3 team. Furthermore, you can publish your findings in a scientific journal such as Cryptologia or Journal of Cryptology.

 

Additionally, you may require tools that are not available in a convenient package like CrypTool.


All Challenges (269)

Ordered by date posted, the most recent appear first.

Grille Cipher

[meier-01] - 378 users already solved this challenge, 30 are working on it.
 
 
 

You need to reconstruct some fields of the grille to decrypt the message written on an old note.
Read more...

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Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2011-10-14 18:00
Maximum number of attempts for this challenge: 20

All successful users of this challenge

Rank User (#378) Achieved points (Global score) y-m-d - h:m:s

Daniel Fretwell (fretty) 200 (30107) 2011-10-14 18:18:57
Alexander Dockhorn (Descartes) 200 (1200) 2011-10-14 18:47:18
TURINGBOMBE (TBREAKER) 200 (10616) 2011-10-14 19:04:04
Viktor (Veselovský) 200 (142053) 2011-10-14 19:55:13
#5 J. M. (jomandi) 200 (113270) 2011-10-14 20:53:57
#6 Seth Kintigh (DarkFibre) 200 (79471) 2011-10-14 20:55:24
#7 Armin Krauss (argh) 200 (175390) 2011-10-14 21:10:46
#8 David (aki321) 200 (27482) 2011-10-15 00:49:15
#9 Roland Jansen (roland) 200 (17607) 2011-10-15 13:48:02
#10 Holti (Holti) 200 (6035) 2011-10-15 14:51:13
#11 dbuq (dbuq) 150 (22762) 2011-10-15 19:39:46
#12 Michael Möller (michaelm) 150 (169404) 2011-10-15 21:34:37
#13 Dano (Dano) 150 (14610) 2011-10-15 23:49:32
#14 Jay Kay (Merty) 150 (3726) 2011-10-16 16:28:33
#15 Thomas Mattel (Tom) 133 (2462) 2011-10-16 21:22:04
#16 Thomas Gonda (TomG) 133 (36291) 2011-10-17 13:12:26
#17 Christof Kleber (Loki) 133 (6051) 2011-10-17 17:50:19
#18 Christian Inci (ch100) 125 (9253) 2011-10-18 01:36:33
#19 Mutziman (mutziman) 117 (250) 2011-10-20 14:09:40
#20 Annie (Annanasss) 113 (6813) 2011-10-22 12:19:03
#21 Christian Matt (Luy) 111 (9889) 2011-10-23 02:56:12
#22 Wladimir Paulsen (wladimir) 108 (331) 2011-10-26 16:57:36
#23 Michal Musilek (mim3) 105 (1121) 2011-11-02 21:05:08
#24 Bart den Hartog (Bart13) 105 (118984) 2011-11-04 00:27:45
#25 Sabrina Ryser (Sabse15) 105 (506) 2011-11-05 01:04:36
#26 j.h. (haegarq) 104 (15252) 2011-11-07 18:18:58
#27 Sebastian Fischer (fischers) 102 (308) 2011-11-23 21:57:40
#28 Wade Burch (Braernoch) 102 (1308) 2011-12-07 03:11:28
#29 Nathan (Witten) 102 (25326) 2011-12-09 23:29:02
#30 Darren (barr306) 102 (1056) 2011-12-10 15:52:42
#31 Flo Geht_dich gar_nichts_an (flo) 102 (6271) 2011-12-10 22:23:27
#32 Wombat (Wombat) 102 (5822) 2011-12-11 06:07:04
#33 Mathew Brown (browni3141) 102 (807) 2011-12-12 03:00:00
#34 John Willemse (Melting Brains) 102 (1316) 2011-12-13 14:51:54
#35 Mayuresh Anand (effort2break) 101 (8728) 2012-01-07 20:31:11
#36 Luigi Tomelli (archstanton) 101 (108345) 2012-01-17 12:51:25
#37 George (Theofanidis) 101 (101521) 2012-02-01 21:56:59
#38 Horst Kevin (lordstege) 101 (1419) 2012-02-08 21:00:02
#39 John (Tiger) 101 (1505) 2012-02-16 20:59:26
#40 J Br (j.br) 101 (3242) 2012-02-20 13:01:42
#41 Hans Peter (hanspeter) 101 (52256) 2012-02-22 13:33:41
#42 Lukas (Kahla) 101 (4719) 2012-02-26 22:37:16
#43 Kurt Gebauer (Yokozuna) 101 (146278) 2012-03-06 00:50:11
#44 Felix Mohr (winterwolf) 101 (2364) 2012-03-06 11:56:51
#45 Michael Gürtler (michaelg) 101 (4128) 2012-03-19 18:10:14
#46 Dusan (xxdradus) 101 (40236) 2012-04-06 11:57:19
#47 E.T (Ertheb) 101 (71517) 2012-04-06 22:47:26
#48 Victor Tobies (Donald) 101 (2567) 2012-04-10 21:43:24
#49 H. Lautenschlager (helmi) 101 (29022) 2012-04-14 17:24:20
#50 Torsten Weiß (vice) 101 (406) 2012-04-16 15:35:00
#51 Susanne Lenzen (casanovari) 101 (507) 2012-04-18 23:08:31
#52 Aliazer (Aliazer) 101 (12314) 2012-04-22 22:18:05
#53 Michael (mtt5074) 101 (602) 2012-04-23 21:06:07
#54 Daniel Demmler (dd23) 101 (8942) 2012-04-28 16:51:18
#55 Christof B. (beans90) 100 (9488) 2012-05-06 00:57:40
#56 Uli Dulli (Uli Dulli) 100 (1408) 2012-05-07 22:41:48
#57 Thomas Lambert (lambert) 100 (35237) 2012-05-10 13:49:38
#58 KW (qwer*) 100 (13963) 2012-06-08 21:21:20
#59 zuben c3 (zuben-c3) 100 (24853) 2012-06-11 15:42:52
#60 Michel Van Caneghem (vancan) 100 (49719) 2012-06-11 18:02:51
#61 Daniel Richter (TheHiveMind) 100 (11147) 2012-06-12 20:44:45
#62 Steven Bi (chenhsi) 100 (1305) 2012-06-14 21:38:14
#63 Chris V. (Kiki123987) 100 (601) 2012-06-16 18:55:09
#64 masam (jimboo) 100 (18687) 2012-06-22 13:12:21
#65 Em Doulgerakis (Greko) 100 (124033) 2012-07-11 17:53:36
#66 Sebastian Slupina (Grandwizard) 100 (10866) 2012-07-13 02:08:15
#67 Peter Grosse-Hering (Peter) 100 (8097) 2012-07-16 16:25:23
#68 Sebastian Mederle (Thistle) 100 (1202) 2012-07-17 16:23:48
#69 Stepan (m1sterx) 100 (19165) 2012-07-19 07:29:10
#70 George Ho (GeorgH) 100 (3095) 2012-07-27 03:42:04
#71 Megy (160611) 100 (200) 2012-07-27 03:54:37
#72 David (Neereus) 100 (1420) 2012-08-06 11:28:44
#73 Max (131x) 100 (1659) 2012-08-13 11:05:24
#74 Christopher Thiele (Deep-Sea) 100 (2776) 2012-08-14 15:17:36
#75 chris_3stones (3stones) 100 (37759) 2012-08-17 08:08:35
#76 Deepak Raja N (deepakincredible) 100 (621) 2012-08-20 16:37:39
#77 Moritz Stocker (Trismegistos) 100 (2471) 2012-08-24 16:02:59
#78 Lukas Juhrich (ljuhrich) 100 (5453) 2012-09-01 12:26:50
#79 Silvie Beck (sunny186) 100 (100) 2012-09-02 15:59:26
#80 Hank (hanky) 100 (22859) 2012-09-09 04:34:41
#81 RPH (derichard) 100 (27044) 2012-09-09 19:44:17
#82 Fitzcarraldo (fitzcarraldo) 100 (907) 2012-09-12 20:44:51
#83 Damon Brinkley (dbrink) 100 (203) 2012-09-13 03:16:56
#84 Adam Kral (King7560) 100 (405) 2012-09-16 11:09:41
#85 Benny (Kingombo) 100 (3663) 2012-09-23 16:40:10
#86 Hannes (Hartmann) 100 (8680) 2012-09-23 21:53:12
#87 Martina (Nikita) 100 (3863) 2012-09-27 17:16:20
#88 Patrick Renz (tarantulla) 100 (2027) 2012-09-28 08:49:41
#89 Moritz (mosa1116) 100 (2152) 2012-10-08 21:08:25
#90 Paul Pantea (Soarele007) 100 (2695) 2012-10-11 23:10:49
#91 Manfred Wurm (Tschabobo) 100 (8835) 2012-10-12 21:11:23
#92 Miriam (MiGre) 100 (1745) 2012-10-23 19:58:16
#93 MA (Esperanto) 100 (2265) 2012-10-27 16:06:52
#94 Hannes Nötzli (Faust) 100 (4781) 2012-10-29 18:45:51
#95 Christian (md6) 100 (1404) 2012-11-04 00:32:56
#96 Eugene (ZhekaS) 100 (6037) 2012-11-07 14:31:47
#97 The Enigma (enigma) 100 (14336) 2012-11-08 02:00:00
#98 Julia Werdelmann (jw) 100 (10407) 2012-11-12 20:21:55
#99 Ivan (Ivan) 100 (702) 2012-11-14 19:48:54
#100 Pierre Robier (tripleedged) 100 (5916) 2012-11-15 00:01:46
#101 Andrew (Agromania) 100 (4508) 2012-11-15 10:45:31
#102 Roger Crews (rogerbrandon) 100 (3588) 2012-11-19 01:16:40
#103 Andreas W. (v23v) 100 (502) 2012-11-30 11:39:48
#104 Jan (Yazoh) 100 (1000) 2013-01-02 22:20:10
#105 Iain Sharp (WoodenHedgehog) 100 (2196) 2013-01-21 17:42:13
#106 kevin shaw (steggily) 100 (2298) 2013-01-22 09:50:56
#107 Thomas Hahn (4OsoCg31XYcO) 100 (1703) 2013-01-23 17:20:37
#108 Scruffy (Scruffy) 100 (501) 2013-01-23 17:31:01
#109 zahir mohsen moradi (ariobarzan) 100 (99757) 2013-01-27 11:19:14
#110 Ramses (Ramses II) 100 (1924) 2013-02-02 18:08:26
#111 Snake (snk) 100 (72164) 2013-02-03 15:30:36
#112 vanderguile (vanderguile) 100 (2916) 2013-03-14 02:03:58
#113 Hans Joachim Girulat (joregi) 100 (33493) 2013-03-23 23:10:29
#114 Muendo (muendo) 100 (3501) 2013-03-25 11:41:58
#115 Klaus (hoevi) 100 (2302) 2013-03-27 15:41:15
#116 Velko Nikolov (staafl) 100 (13467) 2013-04-09 18:03:53
#117 Dayana Behrens (Dayana) 100 (2144) 2013-04-09 18:24:53
#118 coldwaterq (coldwaterq) 100 (1705) 2013-04-11 11:18:26
#119 Michael Gregorius (Vidar) 100 (601) 2013-04-22 21:29:22
#120 Bernhard Gruber (bgr) 100 (22889) 2013-04-23 13:11:02
#121 Mathias (KeNdo) 100 (2289) 2013-04-24 14:43:39
#122 swarmspider (swarmspider) 100 (4528) 2013-04-25 11:37:28
#123 Stefan (sdn) 100 (5137) 2013-04-29 10:28:12
#124 Petra (humppapenguin) 100 (3872) 2013-05-02 17:15:29
#125 Jörg Schwarzwälder (secuso) 100 (2125) 2013-05-04 23:40:22
#126 HE (hendeng) 100 (1600) 2013-05-16 16:17:10
#127 mk (bilbobeutlin) 100 (12340) 2013-05-17 21:21:26
#128 A. S. (er1709) 100 (1608) 2013-05-18 02:08:54
#129 Bentz (Wolfgang19) 100 (2583) 2013-05-20 14:25:35
#130 n a (jarofyarr) 100 (1901) 2013-05-23 16:43:08
#131 Felix (Flix) 100 (13712) 2013-05-24 20:59:46
#132 CryptY (Grompf) 100 (2880) 2013-05-29 15:17:57
#133 Steve (Samacian) 100 (23804) 2013-06-05 04:19:36
#134 Gergely Simon (george314) 100 (16555) 2013-06-25 18:23:02
#135 Ralf Stephan (rwst) 100 (25229) 2013-07-15 10:26:33
#136 Almut (problelmo) 100 (45992) 2013-07-15 19:52:06
#137 Vlatiha Romanova (Vlatiha) 100 (10323) 2013-07-16 11:35:05
#138 Philipp Hammer-Pohlau (phase2) 100 (17981) 2013-07-19 13:34:39
#139 Forrest Gump (Polyphem) 100 (38763) 2013-07-29 21:44:41
#140 Carsten Hess (machess) 100 (700) 2013-08-01 23:01:42
#141 Gronas (gronas) 100 (2667) 2013-08-07 23:48:21
#142 oldak (oldak) 100 (1300) 2013-08-09 02:43:24
#143 Lutz Sittinger (Kryptolutz) 100 (1802) 2013-08-10 17:40:07
#144 Andreas H. (Cyrpius) 100 (2666) 2013-08-14 21:05:26
#145 Alexander (cruachan) 100 (16051) 2013-09-08 18:03:29
#146 Richard (Richard) 100 (1761) 2013-09-14 13:47:20
#147 Heiko Kirsch (DENISOVA) 100 (1758) 2013-10-03 19:12:14
#148 David (Youhei) 100 (200) 2013-10-08 23:08:18
#149 Boris (Kaasu) 100 (16566) 2013-10-17 21:55:42
#150 Jens (McStryke) 100 (1600) 2013-11-20 09:24:35
#151 pablo (cooltrain) 100 (1500) 2013-11-27 19:01:07
#152 Jim Gillogly (Scryer) 100 (21260) 2013-12-02 08:10:22
#153 artmagic (artmagic) 100 (6298) 2013-12-03 12:20:35
#154 Brad (braddrew) 100 (15878) 2013-12-06 10:45:58
#155 cworstell (ace2) 100 (4870) 2013-12-08 22:08:34
#156 Francisco Moraes (fmoraes) 100 (90044) 2013-12-13 01:02:49
#157 teifi (teifi) 100 (2251) 2013-12-15 00:00:19
#158 Alain (Integral) 100 (207924) 2013-12-15 10:04:48
#159 bla (bla) 100 (2750) 2013-12-21 05:42:15
#160 Csaba Fitzl (csaby) 100 (6696) 2013-12-30 16:32:33
#161 Kim H. S. (tenchijin) 100 (25468) 2013-12-31 09:30:38
#162 Joost (Joost) 100 (2653) 2014-01-02 17:34:41
#163 Pavel (haw) 100 (22728) 2014-01-02 20:10:27
#164 Sebastian Liebl (Basti van Tasti) 100 (2548) 2014-01-05 16:11:56
#165 Josef Gillhuber (jogimi51) 100 (2446) 2014-01-11 19:36:38
#166 James Booth (jimbojetset35) 100 (2547) 2014-01-13 17:37:41
#167 Flo (sealth) 100 (13472) 2014-01-21 19:38:25
#168 Marcel (bene1512) 100 (20896) 2014-01-29 21:29:18
#169 Marco (mawo25) 100 (2445) 2014-02-05 20:45:56
#170 Nofre Tete (noffi) 100 (21921) 2014-02-09 21:32:58
#171 Shoukat (e195633) 100 (10617) 2014-02-13 01:53:21
#172 mark (FivePrime) 100 (3345) 2014-02-13 13:48:27
#173 Karolis (Karmatakaz) 100 (1716) 2014-02-21 12:11:22
#174 Duy Khanh Dau (khanh45a3kct) 100 (5783) 2014-03-11 11:53:28
#175 Sascha (The Hoddich) 100 (4350) 2014-03-12 10:39:03
#176 Karl Schutt (günter) 100 (41550) 2014-03-23 16:20:13
#177 Walram L. (Sugambrus) 100 (400) 2014-03-24 01:06:36
#178 Kevin Bonz (kbonz57) 100 (400) 2014-03-31 23:53:55
#179 Simone (Momo) 100 (5478) 2014-04-10 16:49:59
#180 joe (herbert) 100 (800) 2014-04-18 16:44:42
#181 Simas (Varlius) 100 (600) 2014-05-03 12:56:35
#182 Nik (LastObserver) 100 (3552) 2014-05-03 22:34:31
#183 Joe (IlmJoe) 100 (2938) 2014-05-08 11:19:47
#184 Raphaël (Yahoo51) 100 (901) 2014-05-08 22:41:10
#185 Aivaras (TaiAivaras) 100 (500) 2014-05-20 18:19:35
#186 Igor (idipaolo) 100 (10639) 2014-05-22 16:41:16
#187 pouria (blacksite) 100 (2113) 2014-05-31 21:53:31
#188 Tina (BTina) 100 (1500) 2014-06-01 22:36:36
#189 caesar ([caesar]) 100 (10738) 2014-06-09 17:54:47
#190 Jian Wen (XxWappenxX) 100 (4048) 2014-06-22 20:05:47
#191 Julia Bernotat (El Greco ) 100 (81129) 2014-07-01 13:28:20
#192 julius gaius (julius) 100 (25581) 2014-07-19 20:31:02
#193 Hughes (hughes) 100 (4735) 2014-07-21 22:28:52
#194 Egon Hamburger (Seehase) 100 (3445) 2014-07-24 10:17:28
#195 Robert (rm) 100 (56475) 2014-07-31 21:58:34
#196 Tiloan (Tiloan) 100 (3840) 2014-08-18 22:02:03
#197 Lane Williams (planetlane) 100 (21611) 2014-08-20 00:05:52
#198 Isabella (Isa) 100 (4235) 2014-09-02 00:37:01
#199 Kerstin (herzchen412) 100 (3937) 2014-09-09 13:09:43
#200 Bertold (bk) 100 (9673) 2014-09-13 17:34:32
#201 testgrr (testgrr) 100 (3940) 2014-10-05 11:52:20
#202 Dan Knowles (dkdanknowles) 100 (300) 2014-10-21 10:17:28
#203 Jeetsagar (jeetsagar) 100 (2429) 2014-10-21 20:05:09
#204 Señor Saturn (senorsaturn) 100 (3344) 2014-10-22 00:54:46
#205 Michal (misoxxx) 100 (1710) 2014-10-23 19:45:25
#206 Andreas Frerichs (Ossili) 100 (33266) 2014-11-06 11:18:35
#207 jej (stationz) 100 (4939) 2014-11-08 16:28:51
#208 HolgerK (HolgerK) 100 (25776) 2014-11-21 20:45:17
#209 Michael Jeffrey (empjay) 100 (3004) 2014-11-29 21:52:17
#210 Tim Fink (Magellan) 100 (4876) 2014-12-13 16:03:49
#211 Claude Vaillancourt (Cl3v3r) 100 (38351) 2014-12-29 15:39:59
#212 Danny Higgins (hamster147) 100 (22117) 2015-01-04 12:31:28
#213 Kai Ludwig (TalentRaspel) 100 (15704) 2015-01-05 13:52:23
#214 S Combes (jerva) 100 (99132) 2015-01-21 21:14:53
#215 Kris (K$$$) 100 (3732) 2015-01-22 00:01:06
#216 cothan (cothan) 100 (2124) 2015-01-26 16:20:08
#217 T (Wagner) 100 (16887) 2015-02-09 22:42:22
#218 micaman (micaman) 100 (4634) 2015-02-12 23:43:46
#219 Georgius Stolte (HazmatsFear) 100 (15671) 2015-02-15 23:43:44
#220 Zonkism (zonkism) 100 (4004) 2015-02-17 04:20:43
#221 Tom Tox (tox) 100 (17708) 2015-02-19 21:23:30
#222 Tadas (Alianto) 100 (1723) 2015-02-22 17:54:22
#223 mirth23 (mirth23) 100 (7050) 2015-02-23 09:43:03
#224 Rainer Zufall (kiekuk) 100 (56786) 2015-02-24 17:52:03
#225 Konstantin Golovan (SoulShaker) 100 (14091) 2015-02-28 14:09:47
#226 Mike H (Hunter234) 100 (800) 2015-03-01 19:46:36
#227 Philippe ALLARD (Flobert) 100 (4035) 2015-03-09 01:12:54
#228 darius (dman14) 100 (2328) 2015-03-10 08:20:45
#229 Mark Milhet (xwordmark1) 100 (2322) 2015-03-13 13:54:31
#230 iqmast (iqmast) 100 (2522) 2015-03-24 16:58:55
#231 partamier (yann) 100 (5435) 2015-03-28 14:25:46
#232 Brian Kieslich (briank) 100 (6733) 2015-04-06 01:43:26
#233 S (Dingo_the_BB) 100 (6534) 2015-04-06 21:56:40
#234 Lennart (Penthesilea) 100 (4110) 2015-05-15 01:32:08
#235 Ethan (EESearch) 100 (3925) 2015-05-24 18:02:37
#236 Michael Ammon (Ammonym) 100 (7719) 2015-05-25 02:36:25
#237 Dave (compsec) 100 (3631) 2015-06-07 02:51:23
#238 Defekt75 (Defekt75) 100 (4325) 2015-06-22 17:05:24
#239 Mark (Destranix) 100 (500) 2015-07-04 12:32:46
#240 Mark van Heeswijk (markvh) 100 (2600) 2015-07-05 23:40:09
#241 Erik (Erox) 100 (22651) 2015-07-13 00:12:40
#242 Mehmet Adali (mehmetadali) 100 (2620) 2015-07-13 23:30:04
#243 Maria (julesjulchen) 100 (3019) 2015-07-21 13:23:19
#244 Tradecraft (Tradecraft) 100 (5540) 2015-08-03 21:55:12
#245 Javantea (Javantea) 100 (40816) 2015-08-17 23:08:08
#246 A.Syed (goodgamelife) 100 (400) 2015-08-24 19:19:05
#247 n3v4nc4 (n3v4nc4) 100 (800) 2015-08-26 13:16:11
#248 Joris Diesvelt (SylverFox) 100 (4019) 2015-09-07 16:15:00
#249 Sirius (Leznar) 100 (4552) 2015-09-08 13:38:41
#250 Eva Wagnerová (e.wa) 100 (500) 2015-09-16 18:45:03
#251 Joerg G. (SnifferMaster) 100 (18154) 2015-09-18 05:03:02
#252 Alain Collignon (vexilla72) 100 (80284) 2015-09-29 15:06:15
#253 Dominick (Zokio) 100 (1100) 2015-10-01 06:46:22
#254 J-L Morel (Rossignol) 100 (29125) 2015-10-03 07:22:51
#255 BananaJoee (BananaJoee) 100 (2515) 2015-10-08 23:01:37
#256 S (Zyphe) 100 (10461) 2015-10-24 12:22:07
#257 Martin (martinbucher) 100 (27363) 2015-10-24 20:10:53
#258 Foster (forst) 100 (2515) 2015-10-26 17:57:32
#259 Szabó Zoltán (szabo.z87) 100 (55604) 2015-10-30 06:39:04
#260 Martina (BonoV) 100 (3017) 2015-11-01 18:40:37
#261 Rainer (Rainer74) 100 (8417) 2015-12-05 00:18:46
#262 Corneli Keim (cryptina) 100 (703) 2015-12-19 10:52:56
#263 Wolfgang Kittenberger (kittekat) 100 (600) 2015-12-19 19:17:55
#264 Dominik M. (Sgt. Pepper) 100 (89042) 2015-12-21 07:20:29
#265 Imam Uasa (Merricx) 100 (9188) 2015-12-24 17:48:09
#266 Graham (graham107) 100 (400) 2016-01-08 10:45:06
#267 Jeremy Juenger (The_Shocker_12) 100 (3720) 2016-01-09 00:59:32
#268 Casaubon (cfreuden) 100 (8515) 2016-01-11 19:16:00
#269 Fabian (XP-72) 100 (3707) 2016-02-03 22:30:35
#270 D (devilchn) 100 (11142) 2016-02-06 16:38:53
#271 WF (f077) 100 (6874) 2016-02-13 17:08:14
#272 Marco Manfredi (mkk9901) 100 (17686) 2016-03-01 15:59:37
#273 Ines (bufo01) 100 (4515) 2016-03-02 18:50:53
#274 Peter (Garnet) 100 (14234) 2016-03-07 11:18:00
#275 Marc (rcll0891) 100 (22180) 2016-03-13 13:00:26
#276 Norbert Biermann (Norbert) 100 (44430) 2016-07-07 08:14:14
#277 Qinncade (Qinncade) 100 (2610) 2016-07-19 19:59:51
#278 Lucy (Ultramarin) 100 (2009) 2016-08-02 10:29:02
#279 Hajoe (Tintin-Muc) 100 (6923) 2016-08-02 21:36:53
#280 Kurona (Kurona) 100 (1100) 2016-08-11 15:20:07
#281 Benjamin Snavely (kaka) 100 (2708) 2016-08-14 17:46:35
#282 Tobias (Sanchairudo) 100 (1807) 2016-08-21 11:37:16
#283 Nik (f1remind) 100 (1907) 2016-09-01 09:55:26
#284 Robert Kosten (Robert Kosten) 100 (2724) 2016-09-09 14:11:03
#285 Marcin Zawadzki (harry007) 100 (3012) 2016-09-09 22:36:41
#286 Marc (m413rc) 100 (1907) 2016-09-22 09:51:22
#287 John Felix (johnf) 100 (3705) 2016-09-24 14:44:20
#288 Nicolas (nicosPavlov) 100 (151166) 2016-09-28 18:57:47
#289 Daniel Walder (ibex) 100 (14372) 2016-10-03 22:48:21
#290 Meine Registrierung (TryC3) 100 (6045) 2016-10-07 18:53:10
#291 AM (nsd23) 100 (2306) 2016-10-13 01:28:09
#292 Julian (Lemmynator) 100 (16666) 2016-10-13 13:19:28
#293 Darchicourt (Darki) 100 (3308) 2016-11-02 13:27:31
#294 Mirko Rendey (Biork) 100 (6295) 2016-11-22 13:06:28
#295 Simon Jakob (simon.jakob) 100 (18714) 2016-11-27 01:17:46
#296 Schmocker Anita (Anita) 100 (2205) 2016-11-30 23:58:52
#297 Michael (FoM) 100 (34465) 2016-12-02 09:09:24
#298 JoGo (JoGo) 100 (11686) 2016-12-02 19:18:13
#299 Grigorios (grigorios) 100 (2205) 2016-12-03 22:55:30
#300 John Stenmark (DoggedWit) 100 (2405) 2016-12-18 23:45:46
#301 Steffen (stmue) 100 (2911) 2017-01-03 12:31:22
#302 Lkh (Lkh) 100 (1604) 2017-01-26 19:57:49
#303 J@cK (J@cK) 100 (3800) 2017-02-02 15:03:56
#304 Rene (ion) 100 (5617) 2017-02-11 13:55:08
#305 Bill Noyce (AB1AV) 100 (900) 2017-02-18 21:45:11
#306 klemen (klemenko7) 100 (600) 2017-02-19 19:42:00
#307 Mihail (plexor) 100 (16827) 2017-02-22 17:03:47
#308 Zigmas Satkevičius (Zylius) 100 (2600) 2017-02-28 21:54:58
#309 Mir Dim (mir0soft) 100 (72404) 2017-03-11 19:10:53
#310 chris (c2) 100 (51973) 2017-03-16 17:00:04
#311 Kai Fischell (MrFlector) 100 (1433) 2017-03-19 20:05:04
#312 Chicken Attack (joker1569) 100 (2603) 2017-03-21 05:02:15
#313 sarah b (silva) 100 (14059) 2017-03-23 20:32:17
#314 Ex Machina (Crazyeights) 100 (400) 2017-03-25 03:59:19
#315 Martin S (snowy) 100 (900) 2017-04-06 15:25:26
#316 Anggia (Vuleedazula) 100 (1608) 2017-04-27 14:22:42
#317 Kasia (kasia-tutej) 100 (53366) 2017-05-29 17:16:28
#318 D3d4lu5 (D3d4lu5) 100 (260853) 2017-06-10 02:14:46
#319 Moomin (Mushmom) 100 (7674) 2017-07-15 10:32:56
#320 Akonia (Akonia12) 100 (12153) 2017-07-17 20:15:35
#321 Immo Weber (MandelToast) 100 (10061) 2017-08-13 15:08:28
#322 Godfrey Norton (Godfrey) 100 (8162) 2017-08-20 18:53:09
#323 Mr. Fox (Mr. Fox) 100 (3395) 2017-08-27 20:53:55
#324 Dennis Busch (0xDB) 100 (3693) 2017-09-26 16:05:39
#325 Dmitry Eremin-Solenikov (lumag) 100 (4482) 2017-10-16 10:56:05
#326 nimroth (nimroth cynthor) 100 (6021) 2017-11-21 18:44:02
#327 Samuel (Samusicus) 100 (2203) 2018-01-07 15:57:28
#328 Helmut (bonsai) 100 (3890) 2018-02-08 20:56:07
#329 Julian (Ju1703) 100 (4190) 2018-02-21 13:36:33
#330 Benjamin (200611736) 100 (10086) 2018-04-01 20:08:51
#331 Lara Riegelhofer (larrow_sparrow) 100 (2798) 2018-04-02 23:54:51
#332 Luigi Castro Alvis (LuigiCastro21) 100 (2417) 2018-04-19 03:40:00
#333 Diego (DiegoRA) 100 (3697) 2018-04-19 03:41:33
#334 Lucio (lcalderonc) 100 (1251) 2018-04-24 01:07:18
#335 Steve Vaillancourt (stvai2) 100 (15041) 2018-04-27 00:50:13
#336 Allisat (psychohasii) 100 (4356) 2018-04-29 17:43:33
#337 Victor Cueva (Victoralin10) 100 (5282) 2018-04-29 22:57:35
#338 Jordy Reategui Rivera (eljordy) 100 (600) 2018-04-29 23:06:26
#339 Eric (ExAstris) 100 (26990) 2018-05-15 23:00:22
#340 Christophe BORELLY (cb34) 100 (12358) 2018-06-01 13:27:36
#341 Fedilia (Fedilia) 100 (4489) 2018-06-09 08:09:41
#342 Christian (MarquisDeSud) 100 (4488) 2018-06-15 14:54:01
#343 James (t2020) 100 (1997) 2018-06-20 12:39:01
#344 Random Dude (rnd) 100 (77973) 2018-06-21 13:44:20
#345 E41514019 (E41514019) 100 (2885) 2018-07-04 06:20:37
#346 Napoleon (Cenlan) 100 (400) 2018-07-17 19:15:33
#347 MMunkun (MMunkun) 100 (900) 2018-09-01 19:53:49
#348 HowarthStudios (HowarthStudios) 100 (3496) 2018-09-12 17:15:30
#349 Mathijs Verbeek (QIXL) 100 (3096) 2018-10-02 15:12:41
#350 Beamofoldlight (Beamofoldlight) 100 (2295) 2018-10-16 14:06:00
#351 Thalhammer (Thalhammer) 100 (3784) 2018-10-17 18:28:49
#352 Mart (Mart) 100 (3584) 2018-10-26 21:55:38
#353 freak_out (freak_out) 100 (803) 2018-10-26 23:08:33
#354 Wolvitor (Wolvitor) 100 (600) 2018-10-28 16:19:02
#355 phoenix1204 (phoenix1204) 100 (1800) 2018-10-28 18:23:26
#356 Manfred Paul (manf) 100 (14774) 2018-11-13 23:01:11
#357 Clemens (16dombrowski) 100 (5136) 2018-12-15 00:23:06
#358 Svetlana Lessin (16Lessin) 100 (2294) 2018-12-17 23:03:47
#359 Alex (Meiny) 100 (5136) 2018-12-18 20:47:51
#360 whitecowboy (whitecowboy) 100 (7446) 2018-12-22 09:09:33
#361 Hipster (Hipster) 100 (1789) 2018-12-30 02:54:38
#362 Piotr (lesnik7) 100 (7971) 2019-01-11 10:36:22
#363 Bertolo (Bertolo) 100 (7167) 2019-01-12 14:46:48
#364 Joe Doe (tr_joedoe) 100 (1600) 2019-01-22 19:01:21
#365 Sergej Schalew (CryptoSolver) 100 (600) 2019-01-28 15:40:58
#366 Kevin Weber (ThunderArmy) 100 (7783) 2019-02-06 00:12:58
#367 Rolfe Bozier (rolfe) 100 (4769) 2019-02-09 03:25:05
#368 simone (xseris) 100 (8432) 2019-02-15 18:55:47
#369 León (skrilly4) 100 (2294) 2019-02-17 01:15:56
#370 LoneWolf219 (LoneWolf219) 100 (12795) 2019-02-17 02:37:56
#371 madness (madness) 100 (15307) 2019-02-22 04:03:25
#372 Lia (Lia) 100 (6855) 2019-03-09 19:02:31
#373 E41614006 (E41614006) 100 (2188) 2019-03-10 02:30:11
#374 Mike (RogueRamblers) 100 (9347) 2019-03-13 23:31:10
#375 Piyush Agarwal (Piyushgrwl) 100 (3493) 2019-03-20 22:21:04
#376 steven (steven18) 100 (3091) 2019-03-23 21:50:35
#377 Klaus (kumaus) 100 (21415) 2019-03-28 00:14:31
#378 Jurian (Jurian95) 100 (2793) 2019-03-29 21:15:49
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Double Columnar Transposition

[dano-01] - 86 users already solved this challenge, 1 is working on it.
 
 
 

Asterix and Obelix besiege Rome. They just happened to find an encrypted message but instead of the common Caesar Cipher the Romans used a new method. Can you decrypt the message?
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Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2011-10-12 14:03
Maximum number of attempts for this challenge: 20

All successful users of this challenge

Rank User (#86) Achieved points (Global score) y-m-d - h:m:s

Armin Krauss (argh) 200 (175390) 2011-10-12 21:40:42
Michael Möller (michaelm) 200 (169404) 2011-10-12 21:53:10
J. M. (jomandi) 200 (113270) 2011-10-12 22:10:29
Seth Kintigh (DarkFibre) 200 (79471) 2011-10-13 05:35:12
#5 Viktor (Veselovský) 200 (142053) 2011-10-13 13:28:12
#6 The Killer (Killer) 133 (42393) 2011-10-14 18:25:38
#7 David (aki321) 104 (27482) 2011-11-08 14:25:16
#8 Bart den Hartog (Bart13) 102 (118984) 2011-11-30 01:04:15
#9 Wombat (Wombat) 102 (5822) 2011-12-11 14:47:18
#10 Flo Geht_dich gar_nichts_an (flo) 102 (6271) 2011-12-11 20:01:17
#11 Jascha Koch (yosh) 101 (2201) 2011-12-28 18:39:36
#12 Peter Mustermann (Gummiboot) 101 (60285) 2012-01-13 17:52:34
#13 Hans Peter (hanspeter) 101 (52256) 2012-02-17 13:37:43
#14 Kurt Gebauer (Yokozuna) 101 (146278) 2012-03-13 19:08:44
#15 George (Theofanidis) 101 (101521) 2012-03-21 19:51:17
#16 Aliazer (Aliazer) 101 (12314) 2012-04-22 22:19:29
#17 Michel Van Caneghem (vancan) 100 (49719) 2012-06-12 09:46:27
#18 Daniel Richter (TheHiveMind) 100 (11147) 2012-06-13 12:53:59
#19 Sebastian Slupina (Grandwizard) 100 (10866) 2012-07-13 13:08:43
#20 chris_3stones (3stones) 100 (37759) 2012-08-17 08:07:52
#21 Em Doulgerakis (Greko) 100 (124033) 2012-08-23 11:44:13
#22 gromone (gromone) 100 (501) 2012-12-20 21:24:58
#23 KW (qwer*) 100 (13963) 2013-01-07 21:22:49
#24 Snake (snk) 100 (72164) 2013-03-18 13:17:30
#25 Luigi Tomelli (archstanton) 100 (108345) 2013-03-25 09:16:33
#26 Ramon Rojas (superme) 100 (3409) 2013-04-14 14:16:59
#27 RPH (derichard) 100 (27044) 2013-04-24 23:38:35
#28 boredStudent (boredStudent) 100 (800) 2013-04-26 14:10:39
#29 Almut (problelmo) 100 (45992) 2013-06-06 21:12:30
#30 E.T (Ertheb) 100 (71517) 2013-06-15 06:54:06
#31 zahir mohsen moradi (ariobarzan) 100 (99757) 2013-08-29 12:49:04
#32 Vlatiha Romanova (Vlatiha) 100 (10323) 2013-08-30 12:16:19
#33 George Lasry (george4096) 100 (292103) 2013-09-04 00:51:59
#34 Steve (Samacian) 100 (23804) 2013-11-01 05:07:11
#35 Jim Gillogly (Scryer) 100 (21260) 2013-12-02 08:46:35
#36 Alain (Integral) 100 (207924) 2013-12-19 11:40:52
#37 maddin (grazertwo) 100 (100) 2013-12-28 22:23:36
#38 Bertold (bk) 100 (9673) 2013-12-30 14:56:56
#39 Kim H. S. (tenchijin) 100 (25468) 2014-02-12 16:39:18
#40 Thomas Schmucker (dg) 100 (26066) 2014-05-29 19:14:08
#41 Francisco Moraes (fmoraes) 100 (90044) 2014-06-26 00:15:20
#42 j.h. (haegarq) 100 (15252) 2014-07-16 06:39:03
#43 Robert (rm) 100 (56475) 2014-07-31 22:49:33
#44 Erich (ErichSt) 100 (4862) 2014-09-01 15:15:17
#45 Thomas Lambert (lambert) 100 (35237) 2014-09-11 08:20:08
#46 Bernhard Gruber (bgr) 100 (22889) 2014-09-18 12:07:54
#47 Andreas Frerichs (Ossili) 100 (33266) 2014-11-11 10:11:13
#48 HolgerK (HolgerK) 100 (25776) 2014-12-09 19:52:26
#49 Pavel (haw) 100 (22728) 2014-12-12 20:48:00
#50 Julia Bernotat (El Greco ) 100 (81129) 2014-12-22 18:25:49
#51 Dusan (xxdradus) 100 (40236) 2015-02-02 16:32:38
#52 mirth23 (mirth23) 100 (7050) 2015-02-23 13:14:23
#53 TURINGBOMBE (TBREAKER) 100 (10616) 2015-03-06 03:36:47
#54 S Combes (jerva) 100 (99132) 2015-03-22 21:11:18
#55 Rainer Zufall (kiekuk) 100 (56786) 2015-03-30 21:38:10
#56 partamier (yann) 100 (5435) 2015-05-15 10:46:19
#57 J-L Morel (Rossignol) 100 (29125) 2015-07-27 08:13:37
#58 Alain Collignon (vexilla72) 100 (80284) 2015-11-03 09:25:58
#59 Szabó Zoltán (szabo.z87) 100 (55604) 2016-01-05 13:14:22
#60 Marc (rcll0891) 100 (22180) 2016-01-10 21:33:57
#61 Hans Joachim Girulat (joregi) 100 (33493) 2016-01-20 14:44:16
#62 Karl Schutt (günter) 100 (41550) 2016-03-09 19:06:32
#63 Peter (Garnet) 100 (14234) 2016-03-24 12:18:23
#64 Lennart (Penthesilea) 100 (4110) 2016-04-17 15:16:13
#65 Lane Williams (planetlane) 100 (21611) 2016-05-03 17:53:31
#66 Norbert Biermann (Norbert) 100 (44430) 2016-07-15 16:55:50
#67 Nicolas (nicosPavlov) 100 (151166) 2016-10-12 14:46:12
#68 Martin (martinbucher) 100 (27363) 2016-11-13 10:41:17
#69 Simon Jakob (simon.jakob) 100 (18714) 2016-12-01 21:48:20
#70 quantenmagier (quantenmagier) 100 (2338) 2016-12-25 03:00:47
#71 Marcel (bene1512) 100 (20896) 2017-01-06 14:38:19
#72 Michael (FoM) 100 (34465) 2017-01-17 08:19:15
#73 Dominik M. (Sgt. Pepper) 100 (89042) 2017-03-27 14:01:00
#74 chris (c2) 100 (51973) 2017-04-04 19:24:39
#75 Mir Dim (mir0soft) 100 (72404) 2017-04-04 21:28:28
#76 Daniel Walder (ibex) 100 (14372) 2017-04-24 22:20:07
#77 D3d4lu5 (D3d4lu5) 100 (260853) 2017-06-17 14:44:30
#78 Danny Higgins (hamster147) 100 (22117) 2017-08-06 16:03:55
#79 Dex (Dex) 100 (100) 2017-10-02 20:31:32
#80 René Peschmann (Varon) 100 (2315) 2018-03-16 21:30:37
#81 Nofre Tete (noffi) 100 (21921) 2018-03-18 19:35:53
#82 Eric (ExAstris) 100 (26990) 2018-05-19 23:51:06
#83 Random Dude (rnd) 100 (77973) 2018-07-17 12:23:37
#84 zuben c3 (zuben-c3) 100 (24853) 2019-01-07 13:34:03
#85 sarah b (silva) 100 (14059) 2019-02-02 21:27:06
#86 madness (madness) 100 (15307) 2019-02-27 13:25:58
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The third ENIGMA M4 message

[hoerenberg-01] - 0 users already solved this challenge.
 
 
 

In 2006 the distributed "M4 Message Breaking Project" under the lead of Stefan Krah aimed at decrypting three ENIGMA M4 messages from the time of World War II. Two of the three messages where decrypted within the first weeks. However, the third message withstood despite all efforts and remained unbroken.

Today, the M4 project has been discontinued with the last message still unbroken. The task of this challenge is to break this very last message - after all, a few years have past since the project was discontinued and cryptanalysis and computational power also advanced during this time.

Note: The solution was published here: http://www.enigma.hoerenberg.com/. You can't get points for solving it any more, but you can still use it as a good training experience.
Read more...

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Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2011-09-21 18:45
Maximum number of attempts for this challenge: 0

All successful users of this challenge

No one solved the challenge right now. Be the first!
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Affine Codes / Modulo Arithmetic with N / Extended Euclid

[gruener-01] - 451 users already solved this challenge, 8 are working on it.
 
 
 

Two girls want to communicate in a secret way using the „affine cipher“. Transform the encryption rule into the decryption rule and turn in the plaintext of the example.
Read more...

Click here to get to the corresponding forum topic to share your opinion.
Click here to download the challenge.
Click here to download the additional file of the challenge.

Authors: This email address is being protected from spambots. You need JavaScript enabled to view it.,This email address is being protected from spambots. You need JavaScript enabled to view it.,This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2011-09-09 11:24
Maximum number of attempts for this challenge: 20

All successful users of this challenge

Rank User (#451) Achieved points (Global score) y-m-d - h:m:s

mischa (mmisc) 200 (22426) 2011-09-09 11:43:24
Roland Jansen (roland) 200 (17607) 2011-09-09 11:43:36
Daniel Fretwell (fretty) 200 (30107) 2011-09-09 12:12:29
dbuq (dbuq) 200 (22762) 2011-09-09 12:24:57
#5 Armin Krauss (argh) 200 (175390) 2011-09-09 13:13:18
#6 Nicolas Golubovic (qll) 200 (14919) 2011-09-09 13:21:04
#7 Peter Mustermann (Gummiboot) 200 (60285) 2011-09-09 13:31:39
#8 Christof Kleber (Loki) 200 (6051) 2011-09-09 13:45:44
#9 kyprizel (kyprizel) 200 (20795) 2011-09-09 13:47:03
#10 Viktor (Veselovský) 200 (142053) 2011-09-09 13:49:54
#11 h3po (h3po) 200 (20433) 2011-09-09 14:26:24
#12 David (aki321) 200 (27482) 2011-09-09 15:02:36
#13 Patrick Bieck (Peeweebee) 200 (3366) 2011-09-09 15:03:40
#14 Seth Kintigh (DarkFibre) 200 (79471) 2011-09-09 16:07:45
#15 J. M. (jomandi) 200 (113270) 2011-09-09 18:20:21
#16 Dano (Dano) 200 (14610) 2011-09-09 18:26:06
#17 Michael Möller (michaelm) 200 (169404) 2011-09-09 20:04:24
#18 Thomas Lambert (lambert) 150 (35237) 2011-09-10 12:53:35
#19 Annie (Annanasss) 150 (6813) 2011-09-10 13:38:32
#20 The Killer (Killer) 150 (42393) 2011-09-10 23:53:21
#21 Thomas Gonda (TomG) 125 (36291) 2011-09-12 15:24:29
#22 Franz Rübe (fraenzchen) 125 (427) 2011-09-12 19:09:53
#23 Robbt Neid (Das Tupel) 125 (9403) 2011-09-12 21:39:05
#24 TURINGBOMBE (TBREAKER) 125 (10616) 2011-09-12 22:26:49
#25 Dennis Walter (Lotus) 111 (6827) 2011-09-18 00:03:20
#26 DirkS (Dustman) 109 (8479) 2011-09-19 19:43:09
#27 Christian Inci (ch100) 109 (9253) 2011-09-20 08:37:59
#28 Die Verwunschene (Hnoss) 108 (509) 2011-09-20 17:50:27
#29 Laura Ohrndorf (larf) 107 (213) 2011-09-23 11:27:46
#30 Lakner (kank) 106 (106) 2011-09-26 11:16:41
#31 Anton Wendel (MoD) 105 (5679) 2011-09-27 23:31:55
#32 Victoria Fehr (Rika) 105 (1472) 2011-09-29 08:31:55
#33 marmotte (marmotte) 105 (1549) 2011-09-30 18:52:29
#34 Jay Kay (Merty) 104 (3726) 2011-10-01 16:32:48
#35 Michael Fraunholz (mif) 104 (304) 2011-10-03 10:41:24
#36 Alexander J (Highbyte) 104 (204) 2011-10-03 11:11:34
#37 JR (grosronan) 104 (307) 2011-10-03 18:25:07
#38 Julian Müller (Oscar) 104 (406) 2011-10-05 11:29:27
#39 Benjamin Skrehot (BennySkr) 104 (409) 2011-10-05 12:58:53
#40 Heinrich von Kleist (perceptron) 103 (103) 2011-10-15 21:23:37
#41 Christian Matt (Luy) 102 (9889) 2011-10-31 23:44:34
#42 Thomas Mattel (Tom) 102 (2462) 2011-11-01 10:24:23
#43 Bart den Hartog (Bart13) 102 (118984) 2011-11-02 18:01:20
#44 Michal Musilek (mim3) 102 (1121) 2011-11-04 21:16:06
#45 Henning Wolter (alanduring) 101 (833) 2011-11-21 02:03:02
#46 Wade Burch (Braernoch) 101 (1308) 2011-12-07 03:51:10
#47 Nathan (Witten) 101 (25326) 2011-12-07 22:35:13
#48 Wombat (Wombat) 101 (5822) 2011-12-10 13:27:21
#49 Flo Geht_dich gar_nichts_an (flo) 101 (6271) 2011-12-10 18:05:04
#50 Mathew Brown (browni3141) 101 (807) 2011-12-12 00:07:39
#51 j.h. (haegarq) 101 (15252) 2011-12-12 18:21:09
#52 Stella Loomis (Lystella) 101 (101) 2011-12-14 18:24:07
#53 Johannes T. (K2d) 101 (1428) 2011-12-16 21:16:38
#54 John Willemse (Melting Brains) 101 (1316) 2011-12-21 10:58:06
#55 Pavel Kessler (pavel) 101 (3791) 2011-12-28 22:05:07
#56 Mayuresh Anand (effort2break) 101 (8728) 2011-12-31 11:36:34
#57 Luigi Tomelli (archstanton) 101 (108345) 2012-01-01 13:58:24
#58 George (Theofanidis) 101 (101521) 2012-01-12 19:27:27
#59 mannavard1611 (mannavard1611) 101 (301) 2012-01-12 21:23:36
#60 Everdoh (Everdoh) 101 (624) 2012-01-14 18:36:52
#61 John (johnstosh) 101 (4448) 2012-01-20 04:46:02
#62 Matthias Schwarzkopf (MatzeAT) 101 (2967) 2012-01-28 16:56:28
#63 Saurabh (saurabheights) 101 (610) 2012-01-29 14:37:30
#64 Lassu Eger (Hun) (slowmouse) 101 (1118) 2012-01-30 21:03:08
#65 George (Sw1mDC) 101 (601) 2012-02-10 16:04:28
#66 Ulrich Dorobeck (Papageno) 101 (3827) 2012-02-13 20:05:43
#67 Hans Peter (hanspeter) 101 (52256) 2012-02-14 17:41:45
#68 E.T (Ertheb) 101 (71517) 2012-02-16 16:09:48
#69 John (Tiger) 101 (1505) 2012-02-16 21:42:40
#70 Benjamin Walter (Xemrox) 101 (701) 2012-02-26 19:07:28
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#372 Mir Dim (mir0soft) 100 (72404) 2017-03-10 15:00:57
#373 Simon Hemmerich (simhem) 100 (800) 2017-03-13 14:14:19
#374 Chicken Attack (joker1569) 100 (2603) 2017-03-17 03:30:59
#375 vsp (vsp) 100 (700) 2017-03-24 15:42:30
#376 chris (c2) 100 (51973) 2017-03-25 07:32:40
#377 Kasia (kasia-tutej) 100 (53366) 2017-05-26 22:41:32
#378 D3d4lu5 (D3d4lu5) 100 (260853) 2017-06-13 02:20:53
#379 NGUYEN Ngoc Ky (kynguyenngoc) 100 (4974) 2017-06-30 06:03:40
#380 Tim Fink (Magellan) 100 (4876) 2017-07-08 12:03:09
#381 Moomin (Mushmom) 100 (7674) 2017-07-15 09:39:30
#382 Akonia (Akonia12) 100 (12153) 2017-07-16 13:59:35
#383 Tarek (mastarux) 100 (3095) 2017-07-18 15:29:57
#384 juw (juw) 100 (4179) 2017-08-10 21:02:02
#385 Immo Weber (MandelToast) 100 (10061) 2017-08-14 22:39:18
#386 Godfrey Norton (Godfrey) 100 (8162) 2017-08-20 17:54:10
#387 Mr. Fox (Mr. Fox) 100 (3395) 2017-08-27 20:50:04
#388 nurnicu (nurnicu) 100 (1200) 2017-09-13 15:31:28
#389 Dennis Busch (0xDB) 100 (3693) 2017-09-25 17:36:46
#390 Andreas Zipse (zippi0815) 100 (3295) 2017-11-02 16:00:38
#391 Handrich (Handrich) 100 (3494) 2017-11-17 17:34:09
#392 nimroth (nimroth cynthor) 100 (6021) 2017-11-18 21:11:38
#393 john doe (misio) 100 (7371) 2017-12-04 17:53:33
#394 teetrnker (teetrinker) 100 (2399) 2018-01-03 21:50:00
#395 andy (drandika) 100 (500) 2018-01-17 19:33:51
#396 Helmut (bonsai) 100 (3890) 2018-02-08 20:05:35
#397 Julian (Ju1703) 100 (4190) 2018-02-21 10:39:01
#398 Tom Tox (tox) 100 (17708) 2018-03-08 16:47:35
#399 Bertold (bk) 100 (9673) 2018-03-08 21:53:17
#400 Kai Fischell (MrFlector) 100 (1433) 2018-03-31 18:30:02
#401 Nimsoo Sun (Nimsoosun) 100 (2518) 2018-04-08 14:21:01
#402 Jordy Reategui Rivera (eljordy) 100 (600) 2018-04-16 08:26:25
#403 Victor Cueva (Victoralin10) 100 (5282) 2018-04-29 21:19:47
#404 Steve Vaillancourt (stvai2) 100 (15041) 2018-05-15 19:18:12
#405 Eric (ExAstris) 100 (26990) 2018-05-16 01:52:57
#406 Benjamin (200611736) 100 (10086) 2018-05-28 18:14:58
#407 James (t2020) 100 (1997) 2018-05-30 12:23:17
#408 Christophe BORELLY (cb34) 100 (12358) 2018-06-01 09:11:25
#409 Fedilia (Fedilia) 100 (4489) 2018-06-09 07:04:22
#410 Christian (MarquisDeSud) 100 (4488) 2018-06-11 13:31:00
#411 Random Dude (rnd) 100 (77973) 2018-06-21 01:11:42
#412 LQL (E41514067) 100 (3180) 2018-07-04 05:13:23
#413 panqi (pq) 100 (1889) 2018-07-04 05:19:23
#414 Arbacle Clemens (arbacle) 100 (2502) 2018-07-23 20:50:40
#415 sarah b (silva) 100 (14059) 2018-08-05 10:50:29
#416 Wieland (wisch) 100 (6633) 2018-08-23 12:22:55
#417 MMunkun (MMunkun) 100 (900) 2018-09-01 19:39:15
#418 Yggi (Yggi) 100 (2295) 2018-10-02 10:55:52
#419 Mathijs Verbeek (QIXL) 100 (3096) 2018-10-02 14:40:17
#420 Beamofoldlight (Beamofoldlight) 100 (2295) 2018-10-16 14:20:46
#421 Thalhammer (Thalhammer) 100 (3784) 2018-10-17 11:51:00
#422 Jan Kowalski (jankowalski25) 100 (2195) 2018-10-26 14:45:56
#423 Ekrem Aydin (Eko115) 100 (1105) 2018-10-26 19:05:07
#424 Mart (Mart) 100 (3584) 2018-10-26 22:45:29
#425 phoenix1204 (phoenix1204) 100 (1800) 2018-10-28 16:28:07
#426 clyto (clytorock) 100 (3195) 2018-11-03 18:57:27
#427 Manfred Paul (manf) 100 (14774) 2018-11-13 22:41:19
#428 whitecowboy (whitecowboy) 100 (7446) 2018-12-21 18:16:19
#429 Dev Kalra (0__0) 100 (1490) 2018-12-27 14:44:45
#430 Bertolo (Bertolo) 100 (7167) 2018-12-28 12:17:23
#431 Clemens (16dombrowski) 100 (5136) 2018-12-29 14:43:47
#432 Piotr (lesnik7) 100 (7971) 2019-01-10 17:34:02
#433 Malcolm Meluch (Malcolmm) 100 (800) 2019-01-12 04:40:26
#434 Marc (rcll0891) 100 (22180) 2019-01-20 18:48:38
#435 Joe Doe (tr_joedoe) 100 (1600) 2019-01-22 18:40:53
#436 Kevin Weber (ThunderArmy) 100 (7783) 2019-02-05 20:20:09
#437 Rolfe Bozier (rolfe) 100 (4769) 2019-02-08 08:34:25
#438 simone (xseris) 100 (8432) 2019-02-14 23:21:24
#439 LoneWolf219 (LoneWolf219) 100 (12795) 2019-02-17 02:06:58
#440 Pierre Robier (tripleedged) 100 (5916) 2019-02-18 15:26:01
#441 madness (madness) 100 (15307) 2019-02-22 02:27:51
#442 George Lasry (george4096) 100 (292103) 2019-02-23 22:05:09
#443 Lia (Lia) 100 (6855) 2019-03-08 18:48:57
#444 Mike (RogueRamblers) 100 (9347) 2019-03-13 22:13:15
#445 Piyush Agarwal (Piyushgrwl) 100 (3493) 2019-03-20 21:02:47
#446 ykaridi (ykaridi) 100 (7035) 2019-03-22 22:17:36
#447 steven (steven18) 100 (3091) 2019-03-24 00:15:26
#448 Jurian (Jurian95) 100 (2793) 2019-03-29 20:19:40
#449 Klaus (kumaus) 100 (21415) 2019-04-02 17:03:36
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A really long number sequence

[veselovsky-02] - 102 users already solved this challenge, 21 are working on it.
 
 
 

This is already a really long number sequence. Can you find the 10001st element?
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Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2011-09-05 22:37
Maximum number of attempts for this challenge: 40

All successful users of this challenge

Rank User (#102) Achieved points (Global score) y-m-d - h:m:s

The Killer (Killer) 2000 (42393) 2011-09-06 04:39:47
Armin Krauss (argh) 2000 (175390) 2011-09-06 14:07:29
J. M. (jomandi) 1824 (113270) 2011-09-06 23:40:27
Dano (Dano) 1725 (14610) 2011-09-08 18:15:50
#5 Peter Mustermann (Gummiboot) 1660 (60285) 2011-09-09 12:57:23
#6 h3po (h3po) 1660 (20433) 2011-09-09 12:58:21
#7 David (aki321) 1660 (27482) 2011-09-09 14:35:41
#8 Cleyton Muto (accepted_rush) 1523 (5578) 2011-09-13 17:16:58
#9 Thomas Gonda (TomG) 1502 (36291) 2011-09-14 10:37:48
#10 Christof Kleber (Loki) 1502 (6051) 2011-09-14 16:17:24
#11 Seth Kintigh (DarkFibre) 1485 (79471) 2011-09-15 19:44:52
#12 dbuq (dbuq) 1398 (22762) 2011-09-23 01:51:11
#13 Daniel Fretwell (fretty) 1378 (30107) 2011-09-26 13:42:50
#14 Christian Matt (Luy) 1275 (9889) 2011-11-01 01:11:32
#15 Alan Dixon (NickBourbaki) 1268 (7761) 2011-11-06 14:47:06
#16 Annie (Annanasss) 1266 (6813) 2011-11-07 09:23:50
#17 Keith Randall (randall77) 1240 (31011) 2011-12-02 08:59:15
#18 Roland Jansen (roland) 1237 (17607) 2011-12-06 15:00:48
#19 Flo Geht_dich gar_nichts_an (flo) 1231 (6271) 2011-12-14 09:10:34
#20 Mayuresh Anand (effort2break) 1220 (8728) 2012-01-01 14:25:11
#21 Scrat (Scrat) 1209 (1409) 2012-01-22 21:44:49
#22 Tom Tox (tox) 1208 (17708) 2012-01-24 15:31:35
#23 Bart den Hartog (Bart13) 1203 (118984) 2012-02-05 14:32:15
#24 aaa dummy (aaadummy) 1199 (1903) 2012-02-16 21:16:41
#25 Ralf Stephan (rwst) 1199 (25229) 2012-02-17 16:20:32
#26 Hans Peter (hanspeter) 1191 (52256) 2012-03-12 13:15:45
#27 Fabian Hemmer (llan) 1187 (7842) 2012-03-23 23:40:23
#28 Martin Härterich (HaeM) 1185 (15149) 2012-04-03 15:26:41
#29 Michel Van Caneghem (vancan) 1177 (49719) 2012-05-04 23:57:44
#30 Thomas Lambert (lambert) 1177 (35237) 2012-05-07 09:31:11
#31 Matthias Brand (cyberwoozle) 1177 (1896) 2012-05-07 15:59:36
#32 Luigi Tomelli (archstanton) 1170 (108345) 2012-06-13 11:44:02
#33 Peter Grosse-Hering (Peter) 1167 (8097) 2012-06-28 10:41:27
#34 Dusan (xxdradus) 1160 (40236) 2012-08-17 07:35:20
#35 Vanessa Gaeke (vgaeke) 1157 (1157) 2012-09-05 08:22:50
#36 E.T (Ertheb) 1157 (71517) 2012-09-05 17:34:52
#37 Fjodor Karamasow (Fjodor) 1155 (3326) 2012-09-26 10:59:14
#38 Holti (Holti) 1155 (6035) 2012-09-26 13:17:38
#39 Matthias Schwarzkopf (MatzeAT) 1153 (2967) 2012-10-09 21:58:19
#40 Hannes (Hartmann) 1153 (8680) 2012-10-13 22:28:32
#41 Kurt Gebauer (Yokozuna) 1151 (146278) 2012-11-02 22:52:05
#42 Andrea Palomba (shi) 1148 (1248) 2012-11-25 23:07:09
#43 Claude Laveaux (claude.laveaux) 1145 (14504) 2013-01-03 15:55:28
#44 zahir mohsen moradi (ariobarzan) 1142 (99757) 2013-02-05 20:11:26
#45 RPH (derichard) 1137 (27044) 2013-04-17 23:10:20
#46 Almut (problelmo) 1136 (45992) 2013-05-01 19:33:37
#47 Felix (Flix) 1135 (13712) 2013-05-25 01:50:50
#48 Georgius Stolte (HazmatsFear) 1134 (15671) 2013-06-10 00:27:35
#49 Gergely Simon (george314) 1133 (16555) 2013-06-18 17:11:25
#50 j.h. (haegarq) 1130 (15252) 2013-08-10 20:44:32
#51 masam (jimboo) 1130 (18687) 2013-08-15 10:23:18
#52 Philipp Hammer-Pohlau (phase2) 1130 (17981) 2013-08-18 11:28:03
#53 Vlatiha Romanova (Vlatiha) 1129 (10323) 2013-08-30 11:06:30
#54 Hank (hanky) 1128 (22859) 2013-10-07 20:29:42
#55 Steve (Samacian) 1127 (23804) 2013-10-10 03:03:18
#56 Boris (Kaasu) 1126 (16566) 2013-11-14 18:23:07
#57 Alain (Integral) 1124 (207924) 2013-12-15 20:55:36
#58 George (Theofanidis) 1124 (101521) 2013-12-21 11:58:11
#59 Em Doulgerakis (Greko) 1124 (124033) 2013-12-30 15:30:10
#60 Michael Doucha (mdou) 1122 (13757) 2014-02-14 11:55:01
#61 Marcel (bene1512) 1122 (20896) 2014-02-16 22:27:44
#62 KW (qwer*) 1122 (13963) 2014-02-20 20:26:22
#63 Igor (idipaolo) 1119 (10639) 2014-05-18 12:20:45
#64 Francisco Moraes (fmoraes) 1118 (90044) 2014-06-20 22:23:53
#65 Julia Bernotat (El Greco ) 1117 (81129) 2014-07-12 17:20:11
#66 baz (oneiron) 1117 (12353) 2014-07-18 03:11:32
#67 Robert (rm) 1116 (56475) 2014-07-31 23:13:23
#68 julius gaius (julius) 1116 (25581) 2014-08-22 15:03:49
#69 HolgerK (HolgerK) 1113 (25776) 2014-11-25 23:27:02
#70 Pavel (haw) 1113 (22728) 2014-12-04 19:53:17
#71 T (Wagner) 1111 (16887) 2015-02-10 20:54:53
#72 Konstantin Golovan (SoulShaker) 1110 (14091) 2015-03-13 15:01:02
#73 Benedikt M. (bm91) 1110 (4112) 2015-03-16 19:25:28
#74 Karl Schutt (günter) 1109 (41550) 2015-04-14 22:55:24
#75 Snake (snk) 1109 (72164) 2015-04-15 19:11:39
#76 Rainer Zufall (kiekuk) 1109 (56786) 2015-04-24 22:01:43
#77 Erik (Erox) 1107 (22651) 2015-07-15 15:06:27
#78 chris_3stones (3stones) 1105 (37759) 2015-12-05 17:40:56
#79 Joerg G. (SnifferMaster) 1104 (18154) 2015-12-20 17:01:01
#80 Dominik M. (Sgt. Pepper) 1104 (89042) 2016-01-05 22:54:58
#81 D (devilchn) 1103 (11142) 2016-02-10 01:08:17
#82 Rider (alrider) 1103 (7214) 2016-02-29 20:25:38
#83 Marco Manfredi (mkk9901) 1103 (17686) 2016-03-18 10:34:23
#84 Marc (rcll0891) 1103 (22180) 2016-03-27 23:57:58
#85 Norbert Biermann (Norbert) 1100 (44430) 2016-09-17 17:53:51
#86 Nicolas (nicosPavlov) 1099 (151166) 2016-11-06 08:30:19
#87 JoGo (JoGo) 1099 (11686) 2016-12-06 17:23:06
#88 Mir Dim (mir0soft) 1097 (72404) 2017-03-21 17:50:33
#89 Mau_Kappel (Mau_Kappel) 1097 (4496) 2017-03-21 22:46:57
#90 chris (c2) 1097 (51973) 2017-04-25 11:11:50
#91 D3d4lu5 (D3d4lu5) 1096 (260853) 2017-07-05 21:37:03
#92 George Lasry (george4096) 1096 (292103) 2017-08-05 22:44:43
#93 Pen (justtesting) 1094 (1697) 2018-01-12 13:31:20
#94 Benjamin Strauss (Benjy) 1093 (1093) 2018-02-08 05:45:56
#95 Benjamin (200611736) 1093 (10086) 2018-04-11 23:17:45
#96 Eric (ExAstris) 1092 (26990) 2018-06-27 23:59:42
#97 Julian (Lemmynator) 1092 (16666) 2018-08-06 14:19:20
#98 Bao Pham (baopham) 1091 (1091) 2018-10-08 07:01:59
#99 Raj (mystRaz) 1091 (1091) 2018-10-08 08:05:48
#100 Random Dude (rnd) 1091 (77973) 2018-10-12 02:55:07
#101 S (Zyphe) 1090 (10461) 2019-01-23 12:25:24
#102 Michael (FoM) 1090 (34465) 2019-02-04 17:44:54
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   +++    [21:51 - 24.04.2019] r_karoly solved the Level I challenge 'Original Caesar Cipher'    +++    [14:24 - 24.04.2019] maryllb solved the Level I challenge 'Number Sequence'    +++    [14:20 - 24.04.2019] lim0n solved the Level I challenge 'Factorization Cipher — Part 1'    +++    [14:17 - 24.04.2019] lim0n solved the Level I challenge 'Number Sequence — Part 8'    +++    [13:31 - 24.04.2019] Hopfrog solved the Level I challenge 'Number Sequence — Part 2'    +++