Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
2564999Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 270
TF target 263
TF below 2^76 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 10000000
B2 = 10050107760
ECM
DigitsB1Curves
2550000251 / 280
Estimated T-Level: 24.5 ⓘ
LL
StatusDateUserResidueShift
VerifiedJoe Decker426E7B7C498952400
Verified1999-07-27Brian DeSpain426E7B7C49895240932452
Verified2018-06-15kkmrkkblmbrbk426E7B7C4989524086242
History
DateUserTypeResult
2025-04-10JossNF-PM1
B1=10000000, B2=10050107760
2024-04-19TJAOINF
no factor from 2^69 to 2^70
2023-01-12Architects CubedNF-PM1
B1=5000000, B2=8646469650
2021-07-12TJAOINF
no factor from 2^68 to 2^69
2019-06-03TJAOINF
no factor from 2^67 to 2^68
2018-06-15kkmrkkblmbrbkC-LL
426E7B7C49895240
2017-08-13Gordon SpenceNF
no factor from 2^66 to 2^67
2016-05-15mikrNF-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
2015-02-23VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-23VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-23dbaughNF
no factor from 2^62 to 2^63
2011-07-18Rob_DeeNF
no factor from 2^61 to 2^62
2011-04-14James HeinrichNF-PM1
B1=175000, B2=4112500, E=6
2011-01-10JossNF-PM1
B1=50000
2011-01-03JossNF-PM1
B1=30000
2010-12-21JossNF-PM1
B1=20000
2009-01-28Sturle SundeNF
no factor from 2^60 to 2^61