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
2455979Factored
FactorDigitsBitsDate
68575193250100320855284632582.52015-07-10 17:08:43
ECM
DigitsB1Curves
255000068 / 280
Estimated T-Level: 21.2 ⓘ
TF below 2^65 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Steve Nicolai223E3BEDBA2792A10
Verified (Factored)Simon Burge223E3BEDBA2792A10
Verified (Factored)1998-02-08Steve Nicolai223E3BEDBA2792A10
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-10-14kkmrkkblmbrbk58F756308C55D5D2198109553
Verified2017-11-05Oliver Kruse58F756308C55D5D2147275153
History
DateUserTypeResult
2022-03-10LordJuliusNF
no factor from 2^1 to 2^60
2018-09-28alpertronNF-PM1
B1=2000000, B2=60000000, E=12
2017-11-05Oliver KruseC-PRP
M2455979/6857519325010032085528463 : 58F756308C55D5D2
PRP: Verified
PRP without proof (not generated)
2017-10-14kkmrkkblmbrbkC-PRP
M2455979/6857519325010032085528463 : 58F756308C55D5D2
PRP: Verified
PRP without proof (not generated)
2015-07-10guruF-ECM
Factor: 6857519325010032085528463 / (ECM curve 1, B1=50000, B2=5000000)
2015-03-03VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-03VictordeHollanderNF
no factor from 2^63 to 2^64
2014-05-19mikrNF-PM1
B1=2382500, B2=85770100, E=12
2013-12-04Jerry HallettNF
no factor from 2^62 to 2^63
2012-06-07Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-01-19Oscar ÖstlinNF-PM1
B1=95000, B2=1947500, E=6
2010-12-22JossNF-PM1
B1=20000
2009-01-14Sturle SundeNF
no factor from 2^60 to 2^61