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
1887773Composite, with 4 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
951437593929.8old
1008335070231236.62008-07-15 07:47:52
4118063533131238.62008-07-15 07:47:52
6917328251752710171859.32015-11-06 12:40:45
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.
PRP
StatusDateUserResidueShiftTypeBase
Verified (Factored)2025-09-02KrieselBD00DD973B2E1700013
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-30alpertronAF7D0E2B6989FBF14013
Verified2017-10-19Oliver KruseAF7D0E2B6989FBF14152551813
History
DateUserTypeResult
2025-09-03Carlos PinhoCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-02KrieselC-PRP
BD00DD973B2E1700
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2017-10-19Oliver KruseC-PRP
M1887773/951437593/100833507023/411806353313/691732825175271017 : AF7D0E2B6989FBF1
PRP: Verified
PRP without proof (not generated)
2017-09-30alpertronC-PRP
M1887773/100833507023/411806353313/691732825175271017/951437593 : AF7D0E2B6989FBF1
PRP: Verified
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12
2015-11-06TJAOIF
Factor: 691732825175271017 / TF: 59-60
2008-07-15J FeitsmaF
Factor: 411806353313
2008-07-15J FeitsmaF
Factor: 100833507023