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
8249993Factored
FactorDigitsBitsDate
9127028108825662170792169.62018-06-08 03:49:49
ECM
DigitsB1Curves
25500003 / 280
Estimated T-Level: 20.1 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1999-10-07Goede Schueler/Christoph SteinbeckFB1972310E6360126628204
Verified (Factored)2002-10-07Ars Technica Team Prime RibFB1972310E6360121468349
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2018-09-28rbanov4474109140DE16F71191987153
Verified2020-03-27arnaud4474109140DE16F71606594453
History
DateUserTypeResult
2020-03-27arnaudC-PRP
M8249993/912702810882566217079 : 4474109140DE16F7
PRP: Verified
PRP without proof (not generated)
2018-09-28rbanovC-PRP
M8249993/912702810882566217079 : 4474109140DE16F7
PRP: Verified
PRP without proof (not generated)
2018-06-08YxinityF
Factor: 912702810882566217079 / TF: 69-70
2018-06-08YxinityNF
no factor from 2^68 to 2^69
2018-06-08YxinityNF
no factor from 2^67 to 2^68
2015-12-15snme2pm1NF
no factor from 2^66 to 2^67
2015-06-03VictordeHollanderNF
no factor from 2^65 to 2^66
2013-12-30David CampeauNF
no factor from 2^64 to 2^65
2012-11-26NesowaNF-PM1
B1=95000, B2=1638750, E=6
2009-05-25Architects CubedNF
no factor from 2^63 to 2^64