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
2207791Composite: 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 = 42721122990
ECM
DigitsB1Curves
2550000280 / 280
30250000165 / 640
Estimated T-Level: 26.3 ⓘ
LL
StatusDateUserResidueShift
Verified1998-04-11Tom Cage651B967D154B83270
Verified1999-02-21Jeffrey651B967D154B83271762408
Verified2018-04-16kkmrkkblmbrbk651B967D154B83272159673
History
DateUserTypeResult
2023-08-11Sid & AndyNF-PM1
B1=10000000, B2=42721122990
2023-06-03JossNF-PM1
B1=1000000, B2=4433779350
2023-02-14JossNF-PM1
B1=1000000, B2=809259990
2022-12-21Architects CubedNF
no factor from 2^69 to 2^70
2021-07-15TJAOINF
no factor from 2^68 to 2^69
2019-12-22mikrNF-PM1
B1=5000000, B2=200000000, E=12
2019-05-06TJAOINF
no factor from 2^67 to 2^68
2018-04-16kkmrkkblmbrbkC-LL
651B967D154B8327
2016-12-12Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^59 to 2^60
2015-12-07Alexander DubrovinNF-PM1
B1=2000000, B2=65000000, E=12
2015-11-10Alexander DubrovinNF-PM1
B1=2000000, B2=8000000, E=12
2015-11-10Alexander DubrovinNF-PM1
B1=1500000, B2=5500000, E=6
2015-10-21ramgeisNF
no factor from 2^65 to 2^66
2015-03-06VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-06VictordeHollanderNF
no factor from 2^63 to 2^64
2013-12-04LaurVNF
no factor from 2^62 to 2^63
2009-01-06Sturle SundeNF
no factor from 2^61 to 2^62
2009-01-02Sturle SundeNF
no factor from 2^60 to 2^61