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
2428999Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
82585967826.3old
315769871928.22008-07-14 20:23:50
ECM
DigitsB1Curves
2550000193 / 280
Estimated T-Level: 23.4
TF below 2^73 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-13Oliver Kruse4B872499659475502189663853
Verified2017-11-27kkmrkkblmbrbk4B87249965947550299803553
History
DateUserTypeResult
2018-09-28alpertronNF-PM1
B1=2000000, B2=60000000, E=12
2017-11-27kkmrkkblmbrbkC-PRP
M2428999/82585967/315769871 : 4B87249965947550
PRP: Verified
PRP without proof (not generated)
2017-10-13Oliver KruseC-PRP
M2428999/82585967/315769871 : 4B87249965947550
PRP: Verified
PRP without proof (not generated)
2008-07-14George WoltmanF-ECM
Factor: 315769871