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
688813Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 269
TF target 244
TF below 2^92 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 47000000
B2 = 668924105850
ECM
DigitsB1Curves
2550000280 / 280
30250000540 / 640
Estimated T-Level: 29.2 ⓘ
LL
StatusDateUserResidueShift
VerifiedDavid Slowinski25680
VerifiedKen Kriesel8E42BD0FC384E5680
VerifiedRicardo Montiel8E42BD0FC384E5680
Verified2015-04-11MadPoo8E42BD0FC384E568411227
History
DateUserTypeResult
2023-09-19masserNF-PP1
Start=144/31, B1=10000000, B2=790000000
2022-10-25masserNF-PM1
B1=47000000, B2=668924105850
2022-10-04masserNF-PP1
Start=6/5, B1=10000000, B2=500000000
2022-09-15masserNF-PM1
B1=47000000
2022-09-01masserNF-PP1
Start=2/7, B1=4700000, B2=202100000
2022-03-07LordJuliusNF
no factor from 2^54 to 2^55
2018-07-25Smok_bmv NF
no factor from 2^68 to 2^69
2018-01-22Smok_bmv NF
no factor from 2^67 to 2^68
2018-01-22Smok_bmv NF
no factor from 2^66 to 2^67
2018-01-22Smok_bmv NF
no factor from 2^65 to 2^66
2017-02-01ConductorNF
no factor from 2^64 to 2^65
2015-11-23Sid & AndyNF-PM1
B1=6888130, B2=206643900, E=12
2015-11-01Gordon SpenceNF
no factor from 2^63 to 2^64
2015-11-01Gordon SpenceNF
no factor from 2^62 to 2^63
2015-05-20lycornNF
no factor from 2^61 to 2^62
2015-04-11MadPooC-LL
8E42BD0FC384E568
2013-10-23David CampeauNF-PM1
B1=1400000, B2=44800000, E=12
2012-08-29JossNF-PM1
B1=1377626
2011-09-18JossNF-PM1
B1=538701
2011-07-14JossNF-PM1
B1=323220
2010-04-05Architects CubedNF
no factor from 2^60 to 2^61
2008-10-11Sturle SundeNF
no factor from 2^59 to 2^60
2008-10-11Sturle SundeNF
no factor from 2^58 to 2^59