Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
25305829Factored
FactorDigitsBitsDate
19606280478946288293678992472890.72021-12-25 00:13:50
ECM
DigitsB1Curves
255000034 / 280
Estimated T-Level: 20.6
TF below 2^63 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)2005-08-16C. Cooper / S. BooneEB4BF405B65C58F913935605
Verified (Factored)2012-05-07DubslowEB4BF405B65C58F918346937
History
DateUserTypeResult
2021-12-25Anton RepkoF-PP1
Start=2/7, B1=2000000, B2=120000000, Factor: 1960628047894628829367899247
2021-10-17TheJudgerNF
no factor from 2^74 to 2^75
2021-10-01TheJudgerNF
no factor from 2^73 to 2^74
2021-08-28TheJudgerNF
no factor from 2^72 to 2^73
2021-08-28TheJudgerNF
no factor from 2^71 to 2^72
2021-06-10mikrNF
no factor from 2^70 to 2^71
2017-03-19ramgeisNF
no factor from 2^69 to 2^70
2012-05-07DubslowC-LL
EB4BF405B65C58F9
2012-01-02Carsten KossendeyNF
no factor from 2^68 to 2^69
2011-12-08Carsten KossendeyNF
no factor from 2^67 to 2^68