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

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Exponent Range:










MnStatusDetails
2917223Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 270
TF target 263
TF below 2^73 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 10000000
B2 = 16475386200
ECM
DigitsB1Curves
2550000193 / 280
Estimated T-Level: 23.4 ⓘ
LL
StatusDateUserResidueShift
Verified1998-06-28Rick Dickinson9A893358334FC20C0
Verified1999-09-30Louis Towles9A893358334FC20C1374799
Verified2018-10-04kkmrkkblmbrbk9A893358334FC20C692644
History
DateUserTypeResult
2023-12-29mikrNF-PM1
B1=10000000, B2=16475386200
2023-10-15JossNF-PM1
B1=2594251, B2=5445460020
2023-10-11JossNF-PM1
B1=2594251, B2=2644922280
2023-05-05TJAOINF
no factor from 2^69 to 2^70
2023-02-20JossNF-PM1
B1=1000000, B2=5596306170
2023-02-15JossNF-PM1
B1=1000000, B2=297802890
2021-05-31TJAOINF
no factor from 2^68 to 2^69
2020-04-01masserNF-PM1
B1=5000000, B2=200000000, E=12
2018-12-18chuenkitNF
no factor from 2^67 to 2^68
2018-10-04kkmrkkblmbrbkC-LL
9A893358334FC20C
2017-11-19Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^59 to 2^60
2016-02-22ramgeisNF
no factor from 2^65 to 2^66
2015-04-25VictordeHollanderNF-PM1
B1=1000000, B2=20000000, E=12
2015-04-25VictordeHollanderNF
no factor from 2^64 to 2^65
2015-04-25VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-10dbaughNF
no factor from 2^62 to 2^63
2011-12-23Grant McCrackenNF
no factor from 2^61 to 2^62
2010-11-15markrNF-PM1
B1=105000, B2=2283750, E=6
2010-11-13JossNF-PM1
B1=15000
2009-02-14Sturle SundeNF
no factor from 2^60 to 2^61