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
2631539Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
6324157307563555422123112479.12019-12-18 06:30:47
ECM
DigitsB1Curves
255000070 / 280
Estimated T-Level: 21.3 ⓘ
TF below 2^66 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Michael TaylorE4E76EAE9320E7CD0
Verified (Factored)1999-05-09Rodney GarnerE4E76EAE9320E7CD902056
Verified (Factored)2018-07-10kkmrkkblmbrbkE4E76EAE9320E7CD2293921
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2019-12-18SRJ2877DC121CB7F344502A1105834053
Verified2019-12-19marssystemsDC121CB7F344502A1167289153
History
DateUserTypeResult
2019-12-19marssystemsC-PRP
M2631539/632415730756355542212311 : DC121CB7F344502A
PRP: Verified
PRP without proof (not generated)
2019-12-18SRJ2877C-PRP
M2631539/632415730756355542212311 : DC121CB7F344502A
PRP: Verified
PRP without proof (not generated)
2019-12-18SRJ2877F-ECM
Factor: 632415730756355542212311 / (ECM curve 37, B1=50000, B2=5000000)
2019-10-30masserNF-PM1
B1=2640000, B2=26400000, E=12
2018-07-10kkmrkkblmbrbkC-LL
E4E76EAE9320E7CD
2017-04-22JossNF-PM1
B1=360000, B2=3600000, E=6
2016-12-26JossNF-PM1
B1=207360
2016-12-24JossNF-PM1
B1=172800
2016-02-23Mark RoseNF
no factor from 2^59 to 2^60
2016-01-11ramgeisNF
no factor from 2^70 to 2^71
2014-03-08Never Odd Or EvenNF
no factor from 2^69 to 2^70
2014-03-08Never Odd Or EvenNF
no factor from 2^68 to 2^69
2014-03-08Never Odd Or EvenNF
no factor from 2^67 to 2^68
2014-03-08Never Odd Or EvenNF
no factor from 2^66 to 2^67
2014-03-08Never Odd Or EvenNF
no factor from 2^65 to 2^66
2013-11-12David CampeauNF
no factor from 2^64 to 2^65
2012-06-06lycornNF
no factor from 2^61 to 2^64
2011-01-17James HeinrichNF-PM1
B1=180000, B2=4275000, E=6
2009-06-20USAFSSNF-PM1
B1=30000, B2=420000
2009-01-31Sturle SundeNF
no factor from 2^60 to 2^61