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
1963081Factored
FactorDigitsBitsDate
20806362429023382353272270.82009-08-19 06:37:58
ECM
DigitsB1Curves
2550000276 / 280
Estimated T-Level: 24.9
TF below 2^78 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Dirk Poelman2542C3565631232E0
Verified (Factored)1999-03-26Ken Finlayson2542C3565631232E1541336
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-05Oliver KruseCB76CA97A03C99431013
Verified2017-11-11kkmrkkblmbrbkCB76CA97A03C99431113078113
History
DateUserTypeResult
2023-10-14USAFSSNF-PM1
B1=576000, B2=490908600
2022-08-12USAFSSNF-PM1
B1=132000, B2=134381520
2017-11-11kkmrkkblmbrbkC-PRP
M1963081/2080636242902338235327 : CB76CA97A03C9943
PRP: Verified
PRP without proof (not generated)
2017-10-05Oliver KruseC-PRP
M1963081/2080636242902338235327 : CB76CA97A03C9943
PRP: Verified
PRP without proof (not generated)
2009-08-19SubPrimeF-ECM
Factor: 2080636242902338235327