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
1878841Factored
FactorDigitsBitsDate
493031958991008525592065.42013-10-07 12:35:19
ECM
DigitsB1Curves
2550000280 / 280
30250000106 / 640
Estimated T-Level: 25.8 ⓘ
TF below 2^81 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
BadJason Mayfield35640EFDD4D2EE5D0
Verified (Factored)1999-01-02Stephen Scott3C485F904119AC431292499
Verified (Factored)1999-03-15David Phillips3C485F904119AC431708978
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-10-04Oliver Kruse6408889F3F3706DD1013
Verified2017-11-08kkmrkkblmbrbk6408889F3F3706DD19260513
History
DateUserTypeResult
2017-11-08kkmrkkblmbrbkC-PRP
M1878841/49303195899100852559 : 6408889F3F3706DD
PRP: Verified
PRP without proof (not generated)
2017-10-04Oliver KruseC-PRP
M1878841/49303195899100852559 : 6408889F3F3706DD
PRP: Verified
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12
2013-10-07Chang Chia-TcheF-ECM
Factor: 49303195899100852559
2012-01-13markrNF-PM1
B1=275000, B2=6000000, E=12
2011-03-08GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-04-12Architects CubedNF
no factor from 2^60 to 2^61