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
6981251Factored
FactorDigitsBitsDate
356278667602340399580427481487131101.52024-02-28 07:47:50
5016670371447984420294205663063332105.32024-02-28 07:47:50
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)1999-04-13INTERSHOP Communications9AA0B09C868538910
Verified (Factored)2002-01-15Fabrice Bellet9AA0B09C868538914687090
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2024-02-28Jason Lynch4BFC918436AC4E9F2688743853
P-1 factors
DateFactorB1B2
2024-02-2817873326357396259852004578340763472546296319672897735410254334314720000128595637170
History
DateUserTypeResult
2024-02-28PerigCERT
PRP Certification
Proof certified good
2024-02-28Jason LynchC-PRP
M6981251/3562786676023403995804274814871/50166703714479844202942056630633 : 4BFC918436AC4E9F
PRP proof power = 8
PRP: Verified
Proof certified good
2024-02-28Jason LynchF-PM1
Factors: 3562786676023403995804274814871,50166703714479844202942056630633 / (P-1, B1=14720000, B2=128595637170)
2021-11-29Seth_TrNF-PM1
B1=4000000, B2=110000000, E=12
2021-09-25SRBaseNF
no factor from 2^71 to 2^72
2021-09-06SRBaseNF
no factor from 2^70 to 2^71
2021-08-11takahashiNF
no factor from 2^69 to 2^70
2020-04-10TJAOINF
no factor from 2^68 to 2^69
2020-01-31takahashiNF-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
2014-02-14lycornNF
no factor from 2^64 to 2^65
2014-02-09NesowaNF
no factor from 2^63 to 2^64
2011-12-06James HeinrichNF-PM1
B1=135000, B2=2835000, E=6