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

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
3279781Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 271
TF target 264
TF below 2^77 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 8500000
B2 = 21768755190
ECM
DigitsB1Curves
2550000265 / 280
Estimated T-Level: 24.7 ⓘ
LL
StatusDateUserResidueShift
Verified1999-09-22John Doe016DE091C2782CF01563194
Verified2000-03-15Stephen Wood016DE091C2782CF00
History
DateUserTypeResult
2025-06-28Architects CubedNF
no factor from 2^70 to 2^71
2023-04-06Sid & AndyNF-PM1
B1=8500000, B2=21768755190
2021-10-27TJAOINF
no factor from 2^69 to 2^70
2021-05-24TJAOINF
no factor from 2^68 to 2^69
2021-02-10mikrNF-PM1
B1=4000000, B2=150000000, E=12
2018-12-03TJAOINF
no factor from 2^67 to 2^68
2017-04-05Gordon SpenceNF
no factor from 2^66 to 2^67
2016-01-25JossNF-PM1
B1=383400, B2=3834000, E=6
2015-06-29ThaNF
no factor from 2^65 to 2^66
2015-02-07VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-07VictordeHollanderNF
no factor from 2^63 to 2^64
2014-10-10JossNF-PM1
B1=99140
2014-06-26-Anonymous-NF-PM1
B1=79570
2012-12-30dbaughNF
no factor from 2^62 to 2^63
2011-10-03Grant McCrackenNF
no factor from 2^61 to 2^62
2011-09-21USAFSSNF-PM1
B1=60000, B2=1065000, E=6
2009-07-09Carsten KossendeyNF-PM1
B1=15000, B2=191250
2009-04-03S485122NF
no factor from 2^60 to 2^61