Marin Mersenne 2^P-1
Username
Password
Forgot password?
White
Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
2860289Factored
FactorDigitsBitsDate
21983073477920505807372270.92016-07-30 13:06:30
ECM
DigitsB1Curves
255000012 / 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)Pete Evans9985EC9A49A38E9B0
Verified (Factored)Jim Fare9985EC9A49A38E9B0
Verified (Factored)1999-07-27Alexey Guzeev9985EC9A49A38E9B2387316
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-10-22Oliver Kruse6D5A6A291A9FDBE71276049953
Verified2017-12-07kkmrkkblmbrbk6D5A6A291A9FDBE7115505053
P-1 factors
DateFactorB1B2
2016-07-3021983073477920505807371740624515000
History
DateUserTypeResult
2023-04-16Kevin_9611NF-PM1
B1=210000, B2=254405970
2017-12-07kkmrkkblmbrbkC-PRP
M2860289/2198307347792050580737 : 6D5A6A291A9FDBE7
PRP: Verified
PRP without proof (not generated)
2017-10-22Oliver KruseC-PRP
M2860289/2198307347792050580737 : 6D5A6A291A9FDBE7
PRP: Verified
PRP without proof (not generated)
2016-07-30JossF-PM1
Factor: 2198307347792050580737 / (P-1, B1=174062, B2=4515000, E=6)
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2016-02-18YxinityNF
no factor from 2^65 to 2^66
2015-04-21VictordeHollanderNF
no factor from 2^64 to 2^65
2015-04-21VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-07dbaughNF
no factor from 2^62 to 2^63
2012-01-24lycornNF
no factor from 2^61 to 2^62
2011-01-30markrNF-PM1
B1=105000, B2=2257500, E=6
2011-01-27JossNF-PM1
B1=50000
2011-01-03JossNF-PM1
B1=30000
2010-12-22JossNF-PM1
B1=20000
2009-07-03Carsten KossendeyNF-PM1
B1=15000, B2=157500
2009-02-13Sturle SundeNF
no factor from 2^60 to 2^61