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

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MnStatusDetails
2312179Factored
FactorDigitsBitsDate
256064398719023222711932374.42020-07-30 14:29:41
ECM
DigitsB1Curves
255000084 / 280
Estimated T-Level: 21.5
TF below 2^66 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Charles Rezk44EBEA25E198F9CE0
Verified (Factored)1999-03-15King Butler44EBEA25E198F9CE237778
Verified (Factored)2018-05-03kkmrkkblmbrbk44EBEA25E198F9CE2045710
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2020-07-31mnd9B37AE113F72A137A1216133453
Verified2020-07-31marssystemsB37AE113F72A137A112218753
History
DateUserTypeResult
2020-07-31marssystemsC-PRP
M2312179/25606439871902322271193 : B37AE113F72A137A
PRP: Verified
PRP without proof (not generated)
2020-07-31mnd9C-PRP
M2312179/25606439871902322271193 : B37AE113F72A137A
PRP: Verified
PRP without proof (not generated)
2020-07-30GANF-ECM
Factor: 25606439871902322271193 / (ECM curve 3, B1=50000, B2=5000000, Sigma=8787757375034513)
2019-04-22TJAOINF
no factor from 2^67 to 2^68
2018-05-03kkmrkkblmbrbkC-LL
44EBEA25E198F9CE
2018-01-07Sid & AndyNF-PM1
B1=6000000, B2=180000000, E=12
2017-05-30Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2015-10-22ramgeisNF
no factor from 2^65 to 2^66
2015-03-03VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-03VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-23dbaughNF
no factor from 2^62 to 2^63
2012-05-23Sebastian HornbostelNF
no factor from 2^61 to 2^62
2010-02-15BudNF-PM1
B1=500000, B2=10000000, E=12
2009-01-14Sturle SundeNF
no factor from 2^60 to 2^61