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

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MnStatusDetails
2915257Factored
FactorDigitsBitsDate
25036480923813408311961.12016-04-04 11:14:54
13522775615487508272792270.22009-03-30 03:37:07
41519664218667915747184225192891.72023-02-07 11:26:32
ECM
DigitsB1Curves
25500004 / 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)1998-03-23Lee RogersE4B71BC199D692190
Verified (Factored)1999-05-16Gary SamadE4B71BC199D69219197923
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-10-25Oliver Kruse8338CE51AB34E25E2285555153
Verified (Factored)2017-12-08kkmrkkblmbrbk8338CE51AB34E25E2238533153
Verified2023-02-08LordJulius8338CE51AB34E25E3231488453
P-1 factors
DateFactorB1B2
2023-02-074151966421866791574718422519360000282695490
History
DateUserTypeResult
2023-02-08curtiscCERT
PRP Certification
Proof certified good
2023-02-08LordJuliusC-PRP
M2915257/2503648092381340831/1352277561548750827279/4151966421866791574718422519 : 8338CE51AB34E25E
PRP proof power = 7
PRP: Verified
Proof certified good
2023-02-07USAFSSF-PM1
Factor: 4151966421866791574718422519 / (P-1, B1=360000, B2=282695490)
2022-03-10LordJuliusNF
no factor from 2^1 to 2^60
2017-12-08kkmrkkblmbrbkC-PRP
M2915257/1352277561548750827279/2503648092381340831 : 8338CE51AB34E25E
PRP: Verified (Factored)
PRP without proof (not generated)
2017-10-25Oliver KruseC-PRP
M2915257/1352277561548750827279/2503648092381340831 : 8338CE51AB34E25E
PRP: Verified (Factored)
PRP without proof (not generated)
2016-04-04TJAOIF
Factor: 2503648092381340831 / TF: 61-62
2009-03-30Chang Chia-TcheF-ECM
Factor: 1352277561548750827279
2009-02-15Sturle SundeNF
no factor from 2^60 to 2^61