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
4186381Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 272
TF target 265
TF below 2^75 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 6200000
B2 = 32702012070
ECM
DigitsB1Curves
2550000229 / 280
Estimated T-Level: 24.1 ⓘ
LL
StatusDateUserResidueShift
VerifiedJohn Lloyd3B9B03056992B6740
Verified2000-01-12Brian Doherty3B9B03056992B6742348103
History
DateUserTypeResult
2024-12-02Andrew BNF
no factor from 2^71 to 2^72
2022-12-16DRobinsonPENF-PM1
B1=6200000, B2=32702012070
2022-05-30mikrNF
no factor from 2^70 to 2^71
2021-06-20axnNF
no factor from 2^69 to 2^70
2021-06-14TJAOINF
no factor from 2^68 to 2^69
2020-12-31Dylan DelgadoNF-PM1
B1=1000000, B2=20000000, E=12
2018-12-07YxinityNF
no factor from 2^67 to 2^68
2017-12-22YxinityNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-06-06snme2pm1NF
no factor from 2^65 to 2^66
2013-11-23David CampeauNF
no factor from 2^64 to 2^65
2013-10-23JayderNF
no factor from 2^63 to 2^64
2013-08-21Squeeky_SquirrelNF-PM1
B1=125000, B2=2406250, E=6
2011-08-24USAFSSNF-PM1
B1=45000, B2=630000, E=6
2011-05-28GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-01-07Grant McCrackenNF
no factor from 2^61 to 2^62
2009-08-04Carsten KossendeyNF-PM1
B1=25000, B2=337500