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
3722087Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 271
TF target 264
TF below 2^75 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 10000000
B2 = 20124394290
ECM
DigitsB1Curves
2550000228 / 280
Estimated T-Level: 24.1 ⓘ
LL
StatusDateUserResidueShift
Verified1997-12-30Randy Given795B9CC4B5E34F450
Verified1999-11-24Lawrence Cairns-Smith795B9CC4B5E34F451527966
History
DateUserTypeResult
2025-05-09JossNF-PM1
B1=10000000, B2=20124394290
2025-04-01TJAOINF
no factor from 2^70 to 2^71
2025-03-22JossNF-PM1
B1=10000000, B2=10027887870
2023-05-27Sid & AndyNF-PM1
B1=7200000, B2=14697446610
2023-02-07JossNF-PM1
B1=1000000, B2=295959510
2022-09-27JossNF-PM1
B1=1000000, B2=130364850
2021-03-11axnNF
no factor from 2^69 to 2^70
2021-01-03Dylan DelgadoNF-PM1
B1=1600000, B2=66000000, E=12
2020-12-12axnNF
no factor from 2^68 to 2^69
2018-12-10TJAOINF
no factor from 2^67 to 2^68
2016-11-01Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-24ramgeisNF
no factor from 2^65 to 2^66
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-02-23Mark RoseNF
no factor from 2^60 to 2^61
2015-01-22VictordeHollanderNF
no factor from 2^64 to 2^65
2015-01-22VictordeHollanderNF
no factor from 2^63 to 2^64
2012-12-25Squeeky_SquirrelNF-PM1
B1=245000, B2=7717500, E=12
2012-04-19GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-04-26Grant McCrackenNF
no factor from 2^61 to 2^62