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

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
1095487Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
33237075591031.6old
ECM
DigitsB1Curves
2550000280 / 280
30250000100 / 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)2025-09-01Kriesel74091974E05A0389013
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-29Oliver KruseF78625ABBCDDC3821013
Verified2017-10-19kkmrkkblmbrbkF78625ABBCDDC382144174213
History
DateUserTypeResult
2025-09-02EthanDCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-01KrieselC-PRP
74091974E05A0389
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2024-10-07timc995NF-PM1
B1=2000000, B2=63130867800
2017-10-19kkmrkkblmbrbkC-PRP
M1095487/3323707559 : F78625ABBCDDC382
PRP: Verified
PRP without proof (not generated)
2017-09-29Oliver KruseC-PRP
M1095487/3323707559 : F78625ABBCDDC382
PRP: Verified
PRP without proof (not generated)