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
2126431Factored
FactorDigitsBitsDate
9915483484743264792172169.72008-12-17 18:26:47
ECM
DigitsB1Curves
2550000121 / 280
Estimated T-Level: 22.2 ⓘ
TF below 2^69 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Tjibbe HofkampDBA9A9135317E63A0
Verified (Factored)1999-03-26Bjørn Roger LarsenDBA9A9135317E63A1746893
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-10-08Oliver Kruse77B7AB07148868A01013
Verified2017-11-17kkmrkkblmbrbk77B7AB07148868A01175283813
History
DateUserTypeResult
2017-11-17kkmrkkblmbrbkC-PRP
M2126431/991548348474326479217 : 77B7AB07148868A0
PRP: Verified
PRP without proof (not generated)
2017-10-08Oliver KruseC-PRP
M2126431/991548348474326479217 : 77B7AB07148868A0
PRP: Verified
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12
2008-12-17alan145F-ECM
Factor: 991548348474326479217