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

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MnStatusDetails
2927129Factored
FactorDigitsBitsDate
19882400229942130811832270.82021-02-09 11:11:56
ECM
DigitsB1Curves
255000055 / 280
Estimated T-Level: 21.0 ⓘ
TF below 2^65 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Scott Kurowski23FA3A5F209C31950
Verified (Factored)1999-05-09Phil Brett23FA3A5F209C3195766245
Verified (Factored)2018-10-06kkmrkkblmbrbk23FA3A5F209C31951808503
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2021-02-11ViliamF3D60C16AB2691B8D1262369753
History
DateUserTypeResult
2021-02-11Ben DeloCERT
PRP Certification
Proof certified good
2021-02-11ViliamFC-PRP
M2927129/1988240022994213081183 : 3D60C16AB2691B8D
PRP proof power = 7
PRP: Verified
Proof certified good
2021-02-09Sergey NosovF-ECM
Factor: 1988240022994213081183 / (ECM curve 2, B1=50000, B2=5000000)
2018-12-20chuenkitNF
no factor from 2^67 to 2^68
2018-10-06kkmrkkblmbrbkC-LL
23FA3A5F209C3195
2017-11-22Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2016-02-23ramgeisNF
no factor from 2^65 to 2^66
2015-04-27VictordeHollanderNF-PM1
B1=1000000, B2=20000000, E=12
2015-04-25VictordeHollanderNF
no factor from 2^64 to 2^65
2015-04-25VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-07dbaughNF
no factor from 2^62 to 2^63
2012-01-07markrNF
no factor from 2^61 to 2^62
2010-11-12markrNF-PM1
B1=105000, B2=2283750, E=6
2009-02-14Sturle SundeNF
no factor from 2^60 to 2^61