Marin Mersenne 2^P-1
Username
Password
Forgot password?
Blue
Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
1888409Factored
FactorDigitsBitsDate
712666562556168026731372375.92008-11-02 01:12:40
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
Verified (Factored)Eric PrestemonA69BCD7A508FCB0E0
Verified (Factored)1999-05-02Ken PlowuchaA69BCD7A508FCB0E225196
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-10-04Oliver KruseC3BF63794E1603841013
Verified2017-11-08kkmrkkblmbrbkC3BF63794E160384126253413
History
DateUserTypeResult
2017-11-08kkmrkkblmbrbkC-PRP
M1888409/71266656255616802673137 : C3BF63794E160384
PRP: Verified
PRP without proof (not generated)
2017-10-04Oliver KruseC-PRP
M1888409/71266656255616802673137 : C3BF63794E160384
PRP: Verified
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12
2008-11-02James HeinrichF-ECM
Factor: 71266656255616802673137