Marin Mersenne 2^P-1
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MnStatusDetails
3925013Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
253638831861801463554712374.42021-05-10 01:58:46
ECM
DigitsB1Curves
255000012 / 280
Estimated T-Level: 20.2 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1998-11-21Vince Gambill9443EE462484BB65733516
Verified (Factored)2001-02-11Otto Bruggeman9443EE462484BB652169613
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2021-05-10/r/counting26EE502FB6D768881127055613
Verified2021-05-13RichD026EE502FB6D768881200613713
P-1 factors
DateFactorB1B2
2021-05-102536388318618014635547114000000700000000
History
DateUserTypeResult
2022-05-25JossNF-PM1
B1=100000, B2=125639514
2022-03-22JossNF-PM1
B1=100000
2022-03-02JossNF-PM1
B1=90000
2021-05-13RichD0C-PRP
M3925013/25363883186180146355471 : 26EE502FB6D76888
PRP: Verified
PRP without proof (not generated)
2021-05-10/r/countingC-PRP
M3925013/25363883186180146355471 : 26EE502FB6D76888
PRP: Verified
PRP without proof (not generated)
2021-05-10axnF-PM1
Factor: 25363883186180146355471 / (P-1, B1=14000000, B2=700000000)
2021-04-22axnNF
no factor from 2^69 to 2^70
2020-06-26TJAOINF
no factor from 2^68 to 2^69
2019-01-11YxinityNF
no factor from 2^67 to 2^68
2017-07-10JossNF-PM1
B1=380160, B2=3801600, E=6
2016-12-04Gordon SpenceNF
no factor from 2^66 to 2^67
2016-04-23JossNF-PM1
B1=190080, B2=3145450, E=6
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-02-13ramgeisNF
no factor from 2^65 to 2^66
2015-01-14VictordeHollanderNF
no factor from 2^64 to 2^65
2015-01-14VictordeHollanderNF
no factor from 2^63 to 2^64
2014-11-06JossNF-PM1
B1=86353
2012-02-10GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-10-02Squeeky_SquirrelNF-PM1
B1=70000, B2=1172500, E=6
2011-02-25Grant McCrackenNF
no factor from 2^61 to 2^62
2009-07-11Carsten KossendeyNF-PM1
B1=20000, B2=285000
2008-12-26Architects CubedNF
no factor from 2^60 to 2^61