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
666229Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 269
TF target 244
TF below 2^91 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 48000000
B2 = 686683097100
ECM
DigitsB1Curves
2550000280 / 280
30250000502 / 640
Estimated T-Level: 28.9 ⓘ
LL
StatusDateUserResidueShift
VerifiedAlex and Nick MyrmanE870
VerifiedDavid Slowinski2E870
VerifiedPhilippe Chessa1B1ADF690DA46E870
Verified2002-08-17Gordon M. Spence1B1ADF690DA46E8768766
Verified2015-04-11MadPoo1B1ADF690DA46E87396940
History
DateUserTypeResult
2023-09-13masserNF-PP1
Start=193/29, B1=10000000, B2=790000000
2022-10-17masserNF-PM1
B1=48000000, B2=686683097100
2022-10-16masserNF-PP1
Start=6/5, B1=10000000, B2=500000000
2022-09-02masserNF-PP1
Start=2/7, B1=4800000, B2=206400000
2022-03-07LordJuliusNF
no factor from 2^54 to 2^55
2019-05-20Smok_bmv NF
no factor from 2^68 to 2^69
2019-05-20Smok_bmv NF
no factor from 2^67 to 2^68
2019-05-20Smok_bmv NF
no factor from 2^66 to 2^67
2017-02-28ConductorNF
no factor from 2^65 to 2^66
2017-02-28ConductorNF
no factor from 2^64 to 2^65
2015-11-03Gordon SpenceNF
no factor from 2^63 to 2^64
2015-11-03Gordon SpenceNF
no factor from 2^62 to 2^63
2015-05-26lycornNF
no factor from 2^61 to 2^62
2015-04-11MadPooC-LL
1B1ADF690DA46E87
2012-04-22kurlyNF-PM1
B1=10000000, B2=200000000, E=12
2011-09-11JossNF-PM1
B1=562496
2011-07-14JossNF-PM1
B1=337497
2010-04-01Architects 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