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

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
1785347Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
89267351826.4old
ECM
DigitsB1Curves
2550000280 / 280
30250000107 / 640
Estimated T-Level: 25.8
TF below 2^81 is very unlikely to find new factors due to ECM effort.
PRP
StatusDateUserResidueShiftTypeBase
Verified (Factored)2025-09-02KrieselD25A2460CE45705F013
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-03Oliver Kruse73D3815F6541C7621013
Verified2017-11-05kkmrkkblmbrbk73D3815F6541C762119666913
History
DateUserTypeResult
2025-09-03Carlos PinhoCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-02KrieselC-PRP
D25A2460CE45705F
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2017-11-05kkmrkkblmbrbkC-PRP
M1785347/89267351 : 73D3815F6541C762
PRP: Verified
PRP without proof (not generated)
2017-10-03Oliver KruseC-PRP
M1785347/89267351 : 73D3815F6541C762
PRP: Verified
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12