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
475777Composite, with 3 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
628025641929.2old
134502157911133.62008-07-21 09:20:03
18680793969344193342495672580.62018-01-26 15:18:31
ECM
DigitsB1Curves
2550000280 / 280
30250000200 / 640
Estimated T-Level: 26.6
TF below 2^83 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-09-26Oliver Kruse15DF0C36605E67C82013
Verified (Factored)2017-09-27Oliver Kruse15DF0C36605E67C82013
Verified (Factored)2017-11-09kkmrkkblmbrbk15DF0C36605E67C8228063613
Verified2018-01-27ANONYMOUSEF2E6D4668925715344597653
Verified2018-01-29MrSupp_CZEF2E6D4668925715347324153
History
DateUserTypeResult
2024-08-10tbusbyNF-PM1
B1=398000, B2=68046478500
2018-01-29MrSupp_CZC-PRP
M475777/628025641/13450215791/1868079396934419334249567 : EF2E6D4668925715
PRP: Verified
PRP without proof (small exponent)
2018-01-27ANONYMOUSC-PRP
M475777/628025641/13450215791/1868079396934419334249567 : EF2E6D4668925715
PRP: Verified
PRP without proof (small exponent)
2018-01-26TJAOIF-ECM
Factor: 1868079396934419334249567 / (ECM curve 34, B1=250000, B2=25000000)
2017-11-09kkmrkkblmbrbkC-PRP
M475777/628025641/13450215791 : 15DF0C36605E67C8
PRP: Verified
PRP without proof (small exponent)
2017-09-27Oliver KruseC-PRP
M475777/628025641/13450215791 : 15DF0C36605E67C8
PRP: Verified
PRP without proof (not generated)
2017-09-26Oliver KruseC-PRP
M475777/628025641/13450215791 : 15DF0C36605E67C8
PRP: Verified
PRP without proof (not generated)
2008-07-21J FeitsmaF
Factor: 13450215791