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
3993257Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 271
TF target 265
TF below 2^80 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 10000000
B2 = 20173583430
ECM
DigitsB1Curves
2550000280 / 280
3025000056 / 640
Estimated T-Level: 25.4 ⓘ
LL
StatusDateUserResidueShift
Verified1998-10-11Ryan Moore6CE710B3A02EAEFD0
Verified1999-12-15Stephen Wood6CE710B3A02EAEFD1553537
History
DateUserTypeResult
2024-11-24JossNF-PM1
B1=10000000, B2=20173583430
2024-04-15JossNF-PM1
B1=10000000, B2=10002782790
2022-04-03KingNF-PM1
B1=5000000, B2=2005315410
2021-06-03-Anonymous-NF
no factor from 2^70 to 2^71
2021-05-19axnNF
no factor from 2^69 to 2^70
2020-05-08TJAOINF
no factor from 2^68 to 2^69
2018-12-20YxinityNF
no factor from 2^67 to 2^68
2016-12-18Gordon SpenceNF
no factor from 2^66 to 2^67
2016-10-19Squeeky_SquirrelNF-PM1
B1=245000, B2=6860000, E=12
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-01-27ramgeisNF
no factor from 2^65 to 2^66
2015-08-28Squeeky_SquirrelNF-PM1
B1=190000, B2=4845000, E=6
2014-11-25JossNF-PM1
B1=86073
2013-10-22David CampeauNF
no factor from 2^64 to 2^65
2013-07-15JayderNF
no factor from 2^63 to 2^64
2012-02-29GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-09-20Squeeky_SquirrelNF-PM1
B1=70000, B2=1190000, E=6
2010-12-08JossNF
no factor from 2^61 to 2^62
2009-07-27Carsten KossendeyNF-PM1
B1=20000, B2=290000