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

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MnStatusDetails
2371709Factored
FactorDigitsBitsDate
286254127581629493230332374.62020-07-01 21:52:40
ECM
DigitsB1Curves
255000062 / 280
Estimated T-Level: 21.1
TF below 2^65 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Peter Marksteiner4B99C144460447450
Verified (Factored)1999-03-26Stephen Scott4B99C144460447452359056
Verified (Factored)2018-05-13kkmrkkblmbrbk4B99C14446044745828636
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2020-07-02M MillerB21C36D20BF1EC97181261453
Verified2020-07-03marssystemsB21C36D20BF1EC971169582753
History
DateUserTypeResult
2020-07-03marssystemsC-PRP
M2371709/28625412758162949323033 : B21C36D20BF1EC97
PRP: Verified
PRP without proof (not generated)
2020-07-02M MillerC-PRP
M2371709/28625412758162949323033 : B21C36D20BF1EC97
PRP: Verified
PRP without proof (not generated)
2020-07-01GANF-ECM
Factor: 28625412758162949323033 / (ECM curve 2, B1=50000, B2=5000000, Sigma=3690733070112361)
2019-04-08TJAOINF
no factor from 2^67 to 2^68
2018-05-13kkmrkkblmbrbkC-LL
4B99C14446044745
2017-06-16Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^59 to 2^60
2016-01-11mikrNF-PM1
B1=3000000, B2=100000000, E=12
2015-10-30ramgeisNF
no factor from 2^65 to 2^66
2015-03-09VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-09VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-23dbaughNF
no factor from 2^62 to 2^63
2012-05-31Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-01-27James HeinrichNF-PM1
B1=160000, B2=3640000, E=6
2011-01-18JossNF-PM1
B1=50000
2010-10-11Oscar ÖstlinNF-PM1
B1=40000, B2=630000, E=6
2009-01-15Sturle SundeNF
no factor from 2^60 to 2^61