Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
12159377Factored
FactorDigitsBitsDate
85420840155094014877890492582.82021-12-15 01:12:14
ECM
DigitsB1Curves
25500002 / 280
Estimated T-Level: 20.0 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)2001-03-05Stephan Grupp6E75179953770ACF8622381
Verified (Factored)2004-06-12Ing. Pavel PaJaSoft Janousek6E75179953770ACF11830814
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2022-02-03Poao517A3F42428634511857910053
P-1 factors
DateFactorB1B2
2021-12-158542084015509401487789049600000306530910
History
DateUserTypeResult
2022-02-03JacobZCERT
PRP Certification
Proof certified good
2022-02-03PoaoC-PRP
M12159377/8542084015509401487789049 : 517A3F4242863451
PRP proof power = 8
PRP: Verified
Proof certified good
2021-12-15lycornF-PM1
Factor: 8542084015509401487789049 / (P-1, B1=600000, B2=306530910)
2021-10-22-Anonymous-NF
no factor from 2^71 to 2^72
2021-06-27ZacHFXNF
no factor from 2^70 to 2^71
2021-06-27ZacHFXNF
no factor from 2^69 to 2^70
2017-11-03ramgeisNF
no factor from 2^68 to 2^69
2015-07-08ThaNF
no factor from 2^67 to 2^68
2015-02-27ThaNF
no factor from 2^66 to 2^67
2013-10-03NesowaNF
no factor from 2^65 to 2^66
2013-08-20lycornNF
no factor from 2^64 to 2^65