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
2857567Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 270
TF target 263
TF below 2^81 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 10000000
B2 = 19223759100
ECM
DigitsB1Curves
2550000280 / 280
30250000101 / 640
Estimated T-Level: 25.8 ⓘ
LL
StatusDateUserResidueShift
VerifiedPaul WatkinsE04194E8CA4188E80
Verified1999-05-23Gord PalametaE04194E8CA4188E81923312
Verified2018-05-08ATHE04194E8CA4188E82265403
History
DateUserTypeResult
2023-07-31TJAOINF
no factor from 2^69 to 2^70
2022-07-02mikrNF-PM1
B1=10000000, B2=19223759100
2021-06-21TJAOINF
no factor from 2^68 to 2^69
2019-10-28masserNF-PM1
B1=2860000, B2=28600000, E=12
2019-01-07chuenkitNF
no factor from 2^67 to 2^68
2018-05-08ATHC-LL
E04194E8CA4188E8
2017-11-12Gordon SpenceNF
no factor from 2^66 to 2^67
2017-06-28JossNF-PM1
B1=390000, B2=3900000, E=6
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2016-02-16ramgeisNF
no factor from 2^65 to 2^66
2015-04-21VictordeHollanderNF
no factor from 2^64 to 2^65
2015-04-21VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-07dbaughNF
no factor from 2^62 to 2^63
2012-01-30Grant McCrackenNF
no factor from 2^61 to 2^62
2011-01-31Carsten KossendeyNF-PM1
B1=195000, B2=4875000, E=6
2011-01-27JossNF-PM1
B1=50000
2010-12-23JossNF-PM1
B1=20000
2009-02-14Sturle SundeNF
no factor from 2^60 to 2^61