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
717581Factored
FactorDigitsBitsDate
3999362117710658925132168.4old
ECM
DigitsB1Curves
2550000280 / 280
30250000102 / 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
Verified2017-09-27Oliver KruseEC0E9AFE382394CF1013
Verified2017-10-13Oliver KruseEC0E9AFE382394CF162739313
Verified2017-12-16ATHEC0E9AFE382394CF162477513
Unverified (Reliable)2020-04-20Oliver Kruse8DB2117645025E__133644953
P-1 factors
DateFactorB1B2
2021-03-1639993621177106589251359239915919
History
DateUserTypeResult
2022-12-30USAFSSNF-PM1
B1=1500000, B2=3720516030
2021-03-16manrusF-PM1
Factor: 399936211771065892513 / (P-1, B1=59239, B2=915919, E=6)
2020-04-20Oliver KruseC-PRP
M717581/399936211771065892513 : 8DB2117645025E__
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-12-16ATHC-PRP
M717581/399936211771065892513 : EC0E9AFE382394CF
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-10-13Oliver KruseC-PRP
M717581/399936211771065892513 : EC0E9AFE382394CF
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-09-27Oliver KruseC-PRP
M717581/399936211771065892513 : EC0E9AFE382394CF
PRP: Unverified (Reliable)
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=500000, B2=15000000, E=12