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

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Exponent Range:










MnStatusDetails
2571827Factored
FactorDigitsBitsDate
17399068751149628429380092580.52021-12-06 14:08:03
ECM
DigitsB1Curves
2550000136 / 280
Estimated T-Level: 22.4 ⓘ
TF below 2^70 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1998-11-07Shane Bumpurs0093CBF2646C99E80
Verified (Factored)1999-04-13barkley vowk0093CBF2646C99E8485914
Verified (Factored)2018-06-16kkmrkkblmbrbk0093CBF2646C99E82318620
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2021-12-08MarkSB2C2413CFC6C568E1198467853
History
DateUserTypeResult
2021-12-09J. W.CERT
PRP Certification
Proof certified good
2021-12-08MarkSC-PRP
M2571827/1739906875114962842938009 : B2C2413CFC6C568E
PRP proof power = 7
PRP: Verified
Proof certified good
2021-12-06MarkSF-ECM
Factor: 1739906875114962842938009 / (ECM curve 2, B1=50000, B2=5000000, Sigma=2836787573343213)
2021-06-10TJAOINF
no factor from 2^68 to 2^69
2019-09-05YxinityNF
no factor from 2^67 to 2^68
2018-06-16kkmrkkblmbrbkC-LL
0093CBF2646C99E8
2017-08-20Gordon SpenceNF
no factor from 2^66 to 2^67
2016-06-15mikrNF-PM1
B1=3200000, B2=112000000, E=12
2016-02-23Mark RoseNF
no factor from 2^59 to 2^60
2015-11-08ramgeisNF
no factor from 2^65 to 2^66
2015-02-23VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-23VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-14dbaughNF
no factor from 2^62 to 2^63
2012-06-19Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-04-17James HeinrichNF-PM1
B1=175000, B2=4112500, E=6
2011-01-10JossNF-PM1
B1=50000
2010-12-21JossNF-PM1
B1=20000
2009-01-30Sturle SundeNF
no factor from 2^60 to 2^61