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
2661457Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 270
TF target 263
TF below 2^75 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 20000000
B2 = 54443613840
ECM
DigitsB1Curves
2550000225 / 280
Estimated T-Level: 24.0 ⓘ
LL
StatusDateUserResidueShift
VerifiedKen KrieselA14FD48E1C3267E20
Verified1999-04-23EDNYA14FD48E1C3267E266988
Verified2018-07-22kkmrkkblmbrbkA14FD48E1C3267E22634350
History
DateUserTypeResult
2024-03-01TJAOINF
no factor from 2^69 to 2^70
2022-12-02kurlyNF-PM1
B1=20000000, B2=54443613840
2021-07-01TJAOINF
no factor from 2^68 to 2^69
2019-11-22masserNF-PM1
B1=2000000, B2=50000000, E=12
2019-05-06TJAOINF
no factor from 2^67 to 2^68
2018-07-22kkmrkkblmbrbkC-LL
A14FD48E1C3267E2
2017-11-14JossNF-PM1
B1=600000, B2=8800000, E=12
2017-09-24JossNF-PM1
B1=500000, B2=5000000, E=6
2017-09-08Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2016-01-22ramgeisNF
no factor from 2^65 to 2^66
2015-04-25VictordeHollanderNF
no factor from 2^64 to 2^65
2015-04-25VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-14dbaughNF
no factor from 2^62 to 2^63
2012-05-27Grant McCrackenNF
no factor from 2^61 to 2^62
2011-01-25James HeinrichNF-PM1
B1=250000, B2=8000000, E=12
2009-06-24USAFSSNF-PM1
B1=30000, B2=420000
2009-01-26Sturle SundeNF
no factor from 2^60 to 2^61