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
1941601Factored
FactorDigitsBitsDate
4004668558571238.5old
1988335063421725709618812477.42021-02-02 19:58:21
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 Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-10-05Oliver Kruse5EBEA2B784D6D4E41013
Verified (Factored)2017-11-15kkmrkkblmbrbk5EBEA2B784D6D4E41178190813
Verified2021-02-03mrhB9665D0AA7E5966A296301353
History
DateUserTypeResult
2021-02-03XebecerCERT
PRP Certification
Proof certified good
2021-02-03mrhC-PRP
M1941601/400466855857/198833506342172570961881 : B9665D0AA7E5966A
PRP proof power = 7
PRP: Verified
Proof certified good
2021-02-02_p95holder_F-ECM
Factor: 198833506342172570961881 / (ECM curve 5, B1=50000, B2=5000000)
2017-11-15kkmrkkblmbrbkC-PRP
M1941601/400466855857 : 5EBEA2B784D6D4E4
PRP: Verified (Factored)
PRP without proof (not generated)
2017-10-05Oliver KruseC-PRP
M1941601/400466855857 : 5EBEA2B784D6D4E4
PRP: Verified (Factored)
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12