Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
6977897Factored
FactorDigitsBitsDate
728593597514042299255159123616931102.52024-02-22 07:02:11
ECM
DigitsB1Curves
25500006 / 280
Estimated T-Level: 20.1 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1999-05-23Stephen WoodEBB054BFDB230CD46106941
Bad2001-11-03jim barchuk1CC981397C7CF1D94180297
Verified (Factored)2002-05-18Rich JacotEBB054BFDB230CD45667569
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2024-02-22Jason Lynch1E9CBD5E6CB2B5891431913653
P-1 factors
DateFactorB1B2
2024-02-22728593597514042299255159123616913905000131528336940
History
DateUserTypeResult
2024-02-22xyuzyzCERT
PRP Certification
Proof certified good
2024-02-22Jason LynchC-PRP
M6977897/7285935975140422992551591236169 : 1E9CBD5E6CB2B589
PRP proof power = 8
PRP: Verified
Proof certified good
2024-02-22Jason LynchF-PM1
Factor: 7285935975140422992551591236169 / (P-1, B1=13905000, B2=131528336940)
2021-11-24Seth_TrNF-PM1
B1=4000000, B2=110000000
2021-09-26SRBaseNF
no factor from 2^71 to 2^72
2021-09-06SRBaseNF
no factor from 2^70 to 2^71
2021-08-09takahashiNF
no factor from 2^69 to 2^70
2020-04-24TJAOINF
no factor from 2^68 to 2^69
2020-01-30takahashiNF-PM1
B1=600000, B2=12000000, E=12
2018-02-27-Anonymous-NF
no factor from 2^67 to 2^68
2016-04-26Gordon SpenceNF
no factor from 2^66 to 2^67
2015-07-03VictordeHollanderNF
no factor from 2^65 to 2^66
2014-02-15lycornNF
no factor from 2^64 to 2^65
2014-02-09NesowaNF
no factor from 2^63 to 2^64
2011-12-01James HeinrichNF-PM1
B1=135000, B2=2835000, E=6