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
3921191Composite, with 3 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
31369529824.9old
21409702871031.02008-09-07 21:13:27
48936463691032.22008-09-07 21:13:27
ECM
DigitsB1Curves
25500003 / 280
Estimated T-Level: 20.1
TF below 2^62 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-11-12Oliver Kruse368BA0DD4C8C9E84331635453
Verified2017-12-19kkmrkkblmbrbk368BA0DD4C8C9E84315108453
History
DateUserTypeResult
2022-05-02JossNF-PM1
B1=500000, B2=125639514
2022-03-22JossNF-PM1
B1=100000
2022-03-21JossNF
no factor from 2^67 to 2^68
2022-03-01JossNF-PM1
B1=90000
2020-11-05JossNF-PM1
B1=392119, B2=3921191, E=6
2017-12-19kkmrkkblmbrbkC-PRP
M3921191/31369529/2140970287/4893646369 : 368BA0DD4C8C9E84
PRP: Verified
PRP without proof (not generated)
2017-11-12Oliver KruseC-PRP
M3921191/31369529/2140970287/4893646369 : 368BA0DD4C8C9E84
PRP: Verified
PRP without proof (not generated)
2008-09-07Will EdgingtonF
Factor: 4893646369
2008-09-07Will EdgingtonF
Factor: 2140970287