Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
3243859Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 271
TF target 264
TF below 2^80 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 8600000
B2 = 22046060400
ECM
DigitsB1Curves
2550000280 / 280
3025000058 / 640
Estimated T-Level: 25.5 ⓘ
LL
StatusDateUserResidueShift
Verified1997-11-11Aaron GillilandF4E791CD955DE9ED0
Verified1999-06-26Rich SmithF4E791CD955DE9ED3037996
History
DateUserTypeResult
2025-07-03Architects CubedNF
no factor from 2^70 to 2^71
2023-05-29Sid & AndyNF-PM1
B1=8600000, B2=22046060400
2023-05-28JossNF-PM1
B1=1000000, B2=1594743150
2022-03-16TJAOINF
no factor from 2^69 to 2^70
2021-02-02ViliamFNF
no factor from 2^68 to 2^69
2020-10-31Ethan O'ConnorNF
no factor from 2^61 to 2^62
2020-10-31Ethan O'ConnorNF
no factor from 2^60 to 2^61
2020-10-31Ethan O'ConnorNF
no factor from 2^59 to 2^60
2020-10-31Ethan O'ConnorNF
no factor from 2^1 to 2^59
2020-06-18mikrNF-PM1
B1=4000000, B2=150000000, E=12
2018-11-12TJAOINF
no factor from 2^67 to 2^68
2017-03-27Gordon SpenceNF
no factor from 2^66 to 2^67
2015-06-24ThaNF
no factor from 2^65 to 2^66
2013-10-22David CampeauNF
no factor from 2^64 to 2^65
2012-11-27Richard B. WoodsNF
no factor from 2^63 to 2^64
2012-10-14Richard B. WoodsNF
no factor from 2^62 to 2^63
2012-06-24c10ck3rNF-PM1
B1=1000000, B2=30000000, E=12
2011-09-09USAFSSNF-PM1
B1=55000, B2=866250, E=6
2011-07-25Carsten KossendeyNF
no factor from 2^61 to 2^62
2009-07-04Carsten KossendeyNF-PM1
B1=15000, B2=191250
2009-04-04S485122NF
no factor from 2^60 to 2^61