Marin Mersenne 2^P-1
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MnStatusDetails
7465957Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
15557974962930897243178656472890.32025-10-14 09:44:32
1670448057338165540823103599049960135113.72023-05-02 08:32:52
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)1999-06-26Richard LemkeAF15DDD7577B44D16383626
Verified (Factored)2002-05-11GrokkyAF15DDD7577B44D13938287
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2023-05-02Naegi Makoto67D023ADE1455C351145649553
Verified2025-10-20Michel Yamagishi67D023ADE1455C352446222953
P-1 factors
DateFactorB1B2
2023-05-021670448057338165540823103599049960131000003100000
2025-10-14155579749629308972431786564725000003690304800
History
DateUserTypeResult
2025-10-20LOBESCERT
PRP Certification
Proof certified good
2025-10-20Michel YamagishiC-PRP
M7465957/1555797496293089724317865647/16704480573381655408231035990499601 : 67D023ADE1455C35
PRP proof power = 8
PRP: Verified
Proof certified good
2025-10-14Sid & AndyF-PM1
Factor: 1555797496293089724317865647 / (P-1, B1=2500000, B2=3690304800)
2023-05-02curtiscCERT
PRP Certification
Proof certified good
2023-05-02Naegi MakotoC-PRP
M7465957/16704480573381655408231035990499601 : 67D023ADE1455C35
PRP proof power = 8
PRP: Verified (Factored)
Proof certified good
2023-05-02DRobinsonPEF-PM1
Factor: 16704480573381655408231035990499601 / (P-1, B1=3100000)
2021-09-30SRBaseNF
no factor from 2^71 to 2^72
2016-05-17ramgeisNF
no factor from 2^70 to 2^71
2016-05-17ramgeisNF
no factor from 2^69 to 2^70
2016-05-17ramgeisNF
no factor from 2^68 to 2^69
2016-05-14america64NF
no factor from 2^67 to 2^68
2016-05-06america64NF
no factor from 2^66 to 2^67
2015-07-16Squeeky_SquirrelNF-PM1
B1=195000, B2=4631250, E=6
2015-06-26VictordeHollanderNF
no factor from 2^65 to 2^66
2013-11-26David CampeauNF
no factor from 2^64 to 2^65
2012-09-17NesowaNF-PM1
B1=85000, B2=1423750, E=6
2012-03-19David CampeauNF
no factor from 2^63 to 2^64