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
3853537Composite: 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 = 8700000
B2 = 44721426750
ECM
DigitsB1Curves
2550000280 / 280
3025000065 / 640
Estimated T-Level: 25.5 ⓘ
LL
StatusDateUserResidueShift
Verified1998-09-20Alex HealyB9CF88FE09E2B2F20
Verified1999-09-30Patrick TimmonsB9CF88FE09E2B2F23797006
History
DateUserTypeResult
2025-02-07TJAOINF
no factor from 2^70 to 2^71
2022-05-11DRobinsonPENF-PM1
B1=8700000, B2=44721426750
2022-04-22DRobinsonPENF
no factor from 2^69 to 2^70
2022-04-14mikrNF-PM1
B1=5000000, B2=405000000
2020-09-29TJAOINF
no factor from 2^68 to 2^69
2019-02-08YxinityNF
no factor from 2^67 to 2^68
2016-11-22Gordon SpenceNF
no factor from 2^66 to 2^67
2016-03-03JossNF-PM1
B1=250905, B2=4516290, E=6
2016-02-28ramgeisNF
no factor from 2^65 to 2^66
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-01-14VictordeHollanderNF
no factor from 2^64 to 2^65
2015-01-14VictordeHollanderNF
no factor from 2^63 to 2^64
2014-10-19JossNF-PM1
B1=86656
2012-02-20GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-10-23Squeeky_SquirrelNF-PM1
B1=70000, B2=1137500, E=6
2011-02-28markrNF
no factor from 2^61 to 2^62
2009-07-27Carsten KossendeyNF-PM1
B1=20000, B2=275000
2009-02-22S485122NF
no factor from 2^60 to 2^61