Marin Mersenne 2^P-1
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MnStatusDetails
7131983Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
2799328307253483380472167.92018-07-25 09:08:03
16522378177731054044830732580.52025-02-02 20:23:11
ECM
DigitsB1Curves
25500006 / 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)1999-07-26Giovambattista CicioniB45BB1533EFA295A3370680
Verified (Factored)2002-02-17Dave WintripB45BB1533EFA295A2717047
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2018-07-27_p95holder_B2ABB51A34BF055D1360619653
Verified (Factored)2019-03-23kkmrkkblmbrbkB2ABB51A34BF055D1436480353
Verified2025-02-07PerigB2ABB51A34BF055D2645854053
P-1 factors
DateFactorB1B2
2025-02-0216522378177731054044830738600004481531670
History
DateUserTypeResult
2025-02-07Nicholas HodsonCERT
PRP Certification
Proof certified good
2025-02-07PerigC-PRP
M7131983/279932830725348338047/1652237817773105404483073 : B2ABB51A34BF055D
PRP proof power = 8
PRP: Verified
Proof certified good
2025-02-02Stef42F-PM1
Factor: 1652237817773105404483073 / (P-1, B1=860000, B2=4481531670)
2019-03-23kkmrkkblmbrbkC-PRP
M7131983/279932830725348338047 : B2ABB51A34BF055D
PRP: Verified (Factored)
PRP without proof (not generated)
2018-07-27_p95holder_C-PRP
M7131983/279932830725348338047 : B2ABB51A34BF055D
PRP: Verified (Factored)
PRP without proof (not generated)
2018-07-25ramgeisF
Factor: 279932830725348338047 / TF: 67-68*
2016-10-22Gordon SpenceNF
no factor from 2^66 to 2^67
2015-06-21VictordeHollanderNF
no factor from 2^65 to 2^66
2014-02-07lycornNF
no factor from 2^64 to 2^65
2014-02-02NesowaNF
no factor from 2^63 to 2^64
2011-12-21James HeinrichNF-PM1
B1=135000, B2=2902500, E=6