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
1283297Factored
FactorDigitsBitsDate
168831112654545179692063.92007-11-15 22:42:50
5678786534668603669912168.92018-01-26 15:21:28
6269581989166625454232169.12018-01-26 15:21:27
ECM
DigitsB1Curves
2550000280 / 280
30250000105 / 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 SlowinskiBFD0
Verified (Factored)Joel ArmengaudC8AE3575D271CBFD0
Verified (Factored)2002-08-24S57483C8AE3575D271CBFD642699
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2017-09-29Oliver Kruse114EA1D2A00C6BA31013
Verified (Factored)2017-10-22kkmrkkblmbrbk114EA1D2A00C6BA31124105013
Verified2018-01-27ANONYMOUSC67A0A7C3036BAB6379849153
Verified2018-01-29Oliver KruseC67A0A7C3036BAB6330847253
History
DateUserTypeResult
2024-02-23USAFSSNF-PM1
B1=640000, B2=894361650
2018-01-29Oliver KruseC-PRP
M1283297/16883111265454517969/626958198916662545423/567878653466860366991 : C67A0A7C3036BAB6
PRP: Verified
PRP without proof (not generated)
2018-01-27ANONYMOUSC-PRP
M1283297/16883111265454517969/567878653466860366991/626958198916662545423 : C67A0A7C3036BAB6
PRP: Verified
PRP without proof (not generated)
2018-01-26TJAOIF-ECM
Factor: 567878653466860366991 / (ECM curve 90, B1=50000, B2=5000000)
2018-01-26TJAOIF-ECM
Factor: 626958198916662545423 / (ECM curve 14, B1=50000, B2=5000000)
2017-10-22kkmrkkblmbrbkC-PRP
M1283297/16883111265454517969 : 114EA1D2A00C6BA3
PRP: Verified
PRP without proof (not generated)
2017-09-29Oliver KruseC-PRP
M1283297/16883111265454517969 : 114EA1D2A00C6BA3
PRP: Verified
PRP without proof (not generated)
2007-11-15James HeinrichF-ECM
Factor: 16883111265454517969