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

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MnStatusDetails
31054391Factored
FactorDigitsBitsDate
1387808803196027258721192476.92021-10-03 00:55:27
ECM
DigitsB1Curves
25500003 / 280
Estimated T-Level: 20.1 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)2006-04-14Brian CardinaleB72D9CAD68C6D2A314616006
Verified (Factored)2013-03-08GrunwalderGIMPB72D9CAD68C6D2A36250467
History
DateUserTypeResult
2021-10-03ATHF-PP1
Start=2/7, B1=300000, B2=7200000, Factor: 138780880319602725872119
2018-04-22ramgeisNF
no factor from 2^70 to 2^71
2013-03-08GrunwalderGIMPC-LL
B72D9CAD68C6D2A3
2013-02-04Architects CubedNF
no factor from 2^69 to 2^70
2012-05-21apsenNF
no factor from 2^68 to 2^69