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
5383943Factored
FactorDigitsBitsDate
473116407442689186004611647999358732137121.82019-12-11 09:46:22
ECM
DigitsB1Curves
25500009 / 280
Estimated T-Level: 20.2 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1999-11-17Gordon Cross57F598E1A2E1E5AE4770383
Verified (Factored)2001-02-11Alan Vidmar57F598E1A2E1E5AE5340145
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2019-12-11Christoph Zenger8AF86C27327F493F187706653
Verified2019-12-14Chang Chia-Tche8AF86C27327F493F1127181653
P-1 factors
DateFactorB1B2
2019-12-11473116407442689186004611647999358732110000000
History
DateUserTypeResult
2019-12-14Chang Chia-TcheC-PRP
M5383943/4731164074426891860046116479993587321 : 8AF86C27327F493F
PRP: Verified
PRP without proof (not generated)
2019-12-11Christoph ZengerNF
no factor from 2^68 to 2^69
2019-12-11Christoph ZengerC-PRP
M5383943/4731164074426891860046116479993587321 : 8AF86C27327F493F
PRP: Verified
PRP without proof (not generated)
2019-12-11KingF-PM1
Factor: 4731164074426891860046116479993587321 / (P-1, B1=1000000)
2019-07-07Ivan MNF-PM1
B1=85000, B2=1211250, E=6
2018-06-19ramgeisNF
no factor from 2^67 to 2^68
2016-08-12Gordon SpenceNF
no factor from 2^66 to 2^67
2015-08-20snme2pm1NF
no factor from 2^65 to 2^66
2014-12-25VictordeHollanderNF
no factor from 2^64 to 2^65
2014-12-25VictordeHollanderNF
no factor from 2^63 to 2^64
2009-11-20USAFSSNF-PM1
B1=60000, B2=1020000, E=6
2009-05-19GrunwalderGIMPNF
no factor from 2^62 to 2^63