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

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MnStatusDetails
3737969Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
3736722604556364152812168.32015-05-28 13:19:10
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
BadBrian J. Beesley685C76FDABA7E54D0
Verified (Factored)1998-05-16Jay SchneiderD0B8EDFB574FE54D0
Verified (Factored)2003-09-29Gord PalametaD0B8EDFB574FE54D1347909
Verified (Factored)2015-03-28MadPooD0B8EDFB574FE54D3239035
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-20kkmrkkblmbrbkFD94E52CF8AFD35C1013
Verified2017-12-03Oliver KruseFD94E52CF8AFD35C1128768213
P-1 factors
DateFactorB1B2
2015-05-283736722604556364152812500007687500
History
DateUserTypeResult
2022-06-16LordJuliusNF
no factor from 2^66 to 2^67
2022-06-16LordJuliusNF
no factor from 2^65 to 2^66
2022-05-25JossNF-PM1
B1=100000, B2=130364850
2022-03-22JossNF-PM1
B1=100000
2022-03-05JossNF-PM1
B1=90000
2022-02-02JossNF
no factor from 2^67 to 2^68
2017-12-03Oliver KruseC-PRP
M3737969/373672260455636415281 : FD94E52CF8AFD35C
PRP: Verified
PRP without proof (not generated)
2017-09-20kkmrkkblmbrbkC-PRP
M3737969/373672260455636415281 : FD94E52CF8AFD35C
PRP: Verified
PRP without proof (not generated)
2015-05-28Squeeky_SquirrelF-PM1
Factor: 373672260455636415281 / (P-1, B1=250000, B2=7687500, E=12)
2015-03-28MadPooC-LL
D0B8EDFB574FE54D
2015-01-23VictordeHollanderNF
no factor from 2^64 to 2^65
2015-01-23VictordeHollanderNF
no factor from 2^63 to 2^64
2014-09-25JossNF-PM1
B1=84342
2014-05-26JossNF-PM1
B1=67171
2012-05-10GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-05-09Grant McCrackenNF
no factor from 2^61 to 2^62
2009-03-05S485122NF
no factor from 2^60 to 2^61