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
2597867Factored
FactorDigitsBitsDate
6895108871142409036392169.22020-07-15 14:18:42
ECM
DigitsB1Curves
255000042 / 280
Estimated T-Level: 20.8 ⓘ
TF below 2^64 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Cliff WichmannFBD9B8B62039FC030
Verified (Factored)1999-07-26Eric KarlsenFBD9B8B62039FC032145125
Verified (Factored)2018-06-25kkmrkkblmbrbkFBD9B8B62039FC031717627
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2020-07-15mrh2792AE0E08915EC81115143853
Verified2020-07-15oodaira2792AE0E08915EC81144699253
History
DateUserTypeResult
2020-07-15oodairaC-PRP
M2597867/689510887114240903639 : 2792AE0E08915EC8
PRP: Verified
PRP without proof (not generated)
2020-07-15mrhC-PRP
M2597867/689510887114240903639 : 2792AE0E08915EC8
PRP: Verified
PRP without proof (not generated)
2020-07-15mnd9F-ECM
Factor: 689510887114240903639 / (ECM curve 3, B1=50000, B2=5000000, Sigma=981811062554048)
2019-03-18TJAOINF
no factor from 2^67 to 2^68
2018-06-25kkmrkkblmbrbkC-LL
FBD9B8B62039FC03
2017-08-21Gordon SpenceNF
no factor from 2^66 to 2^67
2016-08-29mikrNF-PM1
B1=3200000, B2=112000000, E=12
2016-02-23Mark RoseNF
no factor from 2^59 to 2^60
2015-11-08ramgeisNF
no factor from 2^65 to 2^66
2015-02-27VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-27VictordeHollanderNF
no factor from 2^63 to 2^64
2013-09-08AxelssonNF
no factor from 2^62 to 2^63
2012-06-23Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-04-18James HeinrichNF-PM1
B1=175000, B2=4156250, E=6
2011-01-15JossNF-PM1
B1=50000
2010-11-16JossNF-PM1
B1=20000
2009-01-30Sturle SundeNF
no factor from 2^60 to 2^61