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

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MnStatusDetails
2139373Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 270
TF target 262
TF below 2^82 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 10000000
B2 = 30495202920
ECM
DigitsB1Curves
2550000280 / 280
30250000166 / 640
Estimated T-Level: 26.3 ⓘ
LL
StatusDateUserResidueShift
VerifiedRobert FribergF523393F3286364F0
Verified1999-03-01tom ehlertF523393F3286364F477775
Verified2018-04-07kkmrkkblmbrbkF523393F3286364F333352
History
DateUserTypeResult
2025-06-16JossNF-PM1
B1=10000000, B2=30495202920
2025-03-11JossNF-PM1
B1=10000000, B2=20434912680
2025-02-05JossNF-PM1
B1=10000000, B2=10374622440
2024-05-05GregNF
no factor from 2^69 to 2^70
2023-01-27Architects CubedNF
no factor from 2^69 to 2^70
2022-12-21Architects CubedNF-PM1
B1=5000000, B2=9896994030
2021-07-19TJAOINF
no factor from 2^68 to 2^69
2019-04-22TJAOINF
no factor from 2^67 to 2^68
2018-04-07kkmrkkblmbrbkC-LL
F523393F3286364F
2017-10-21mikrNF-PM1
B1=2500000, B2=125000000, E=12
2016-10-29Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-12-27ramgeisNF
no factor from 2^65 to 2^66
2015-03-18VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-18VictordeHollanderNF
no factor from 2^63 to 2^64
2013-12-03c10ck3rNF-PM1
B1=500000, B2=10000000, E=12
2013-02-21dbaughNF
no factor from 2^62 to 2^63
2012-04-16Sebastian HornbostelNF
no factor from 2^61 to 2^62
2010-11-27Oscar ÖstlinNF-PM1
B1=80000, B2=1500000, E=6
2010-10-25Oscar ÖstlinNF-PM1
B1=75011
2009-01-05Sturle SundeNF
no factor from 2^60 to 2^61