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

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Exponent Range:










MnStatusDetails
1141661Factored
FactorDigitsBitsDate
8743217329123658442686888212493099.52015-03-30 07:26:28
ECM
DigitsB1Curves
2550000280 / 280
30250000100 / 640
Estimated T-Level: 25.8
TF below 2^81 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)David Slowinski10F40
Verified (Factored)Jeff Woods28BC1FDAA0A070F40
Verified (Factored)2002-06-29S5748328BC1FDAA0A070F4930489
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-29Oliver Kruse9C6622F12532180A1013
Verified2017-10-17Oliver Kruse9C6622F12532180A160869913
Verified2018-01-05ATH9C6622F12532180A115103513
P-1 factors
DateFactorB1B2
2015-03-3087432173291236584426868882124950000000
History
DateUserTypeResult
2022-03-07LordJuliusNF
no factor from 2^58 to 2^60
2018-01-05ATHC-PRP
M1141661/874321732912365844268688821249 : 9C6622F12532180A
PRP: Verified
PRP without proof (not generated)
2017-10-17Oliver KruseC-PRP
M1141661/874321732912365844268688821249 : 9C6622F12532180A
PRP: Verified
PRP without proof (not generated)
2017-09-29Oliver KruseC-PRP
M1141661/874321732912365844268688821249 : 9C6622F12532180A
PRP: Verified
PRP without proof (not generated)
2015-03-30mikrF-PM1
Factor: 874321732912365844268688821249 / (P-1, B1=5000000)
2015-01-13lycornNF
no factor from 2^64 to 2^65
2014-12-26Matthias WurtingerNF
no factor from 2^63 to 2^64
2012-10-21dbaughNF
no factor from 2^62 to 2^63
2012-08-27AxelssonNF
no factor from 2^61 to 2^62
2012-01-31markrNF-PM1
B1=500000, B2=10000000, E=12
2009-02-18Sturle SundeNF
no factor from 2^60 to 2^61