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Level II Challenges (95)

Page 1 of the challenges in Level II, ordered by date posted (the most recent appear first).

RSA Factoring Challenge: RSA-220

[rsa-03] - 6 users already solved this challenge, 4 are working on it.
 
 
 

This challenge descends from the RSA Laboratories contest to encourage research into the practical difficulty of factoring large integers of different length (between 330 and 2048 bit) and cracking RSA keys used in cryptography. This challenge is about factoring a number with 220 decimal digits.
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Published on: 2012-02-07 10:42
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#6) Achieved points (Global score) y-m-d - h:m:s

Viktor (Veselovský) 0 (113116) 2016-11-23 11:38:21
Snake (snk) 0 (51689) 2016-12-01 16:20:47
S (Zyphe) 0 (8324) 2017-01-02 19:39:56
Bart den Hartog (Bart13) 0 (116412) 2017-01-25 19:34:20
#5 Calebe (calebe.rocha) 0 (500) 2017-05-05 14:34:32
#6 Kasia (kasia-tutej) 0 (25120) 2017-06-16 20:59:52
The solution for this challenge was made public on 2016-05-13, and thus it is not possible to get points for this challenge any more. However, you can still solve and enter a solution for this challenge.
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   +++    [20:18 - 26.06.2017] george4096 solved the Level II challenge 'ORYX Stream Cipher — Part 4a'    +++    [19:43 - 26.06.2017] D3d4lu5 solved the Level I challenge 'Zodiac Cipher'    +++    [19:41 - 26.06.2017] D3d4lu5 solved the Level I challenge 'Post-Quantum Cryptography: Unbalanced Oil and Vinegar System — Part 1'    +++    [21:32 - 25.06.2017] kasia-tutej solved the Level II challenge 'Brute-Force-Attack on Triple-DES with Reduced Key Space'    +++    [10:46 - 25.06.2017] kynguyenngoc solved the Level II challenge 'Cracking SHA1-Hashed Passwords'    +++