Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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Exponent Range:










MnStatusDetails
319313Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 268
TF target 244
TF below 2^103 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 1000000000
B2 = 34113689159550
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000766 / 1566
Estimated T-Level: 32.4 ⓘ
LL
StatusDateUserResidueShift
VerifiedDavid Slowinski33260
VerifiedUnknown33260
VerifiedKlaus Kastens64C7B4373EB3B3260
VerifiedGuillermo Ballester Valor64C7B4373EB3B3260
VerifiedEivind Triel64C7B4373EB3B32652412
Verified2016-06-01MadPoo64C7B4373EB3B326153950
History
DateUserTypeResult
2023-09-06masserNF-PP1
Start=6/5, B1=20000000, B2=1580000000
2023-09-04masserNF-PP1
Start=198/53, B1=20000000, B2=1580000000
2022-10-06Oliver KruseNF-PM1
B1=1000000000, B2=34113689159550
2022-06-14Gordon SpenceNF
no factor from 2^67 to 2^68
2022-05-29LordJuliusNF
no factor from 2^66 to 2^67
2022-03-07LordJuliusNF
no factor from 2^54 to 2^55
2021-06-01George WoltmanNF-PP1
Start=2/7, B1=30000000, B2=2220000000
2019-11-23Gordon SpenceNF
no factor from 2^65 to 2^66
2018-01-31BloodERazorNF
no factor from 2^64 to 2^65
2016-06-16mikrNF-PM1
B1=60000000, B2=3000000000, E=12
2016-06-01MadPooC-LL
64C7B4373EB3B326
2015-12-31Gordon SpenceNF
no factor from 2^63 to 2^64
2015-12-31Gordon SpenceNF
no factor from 2^62 to 2^63
2015-07-20NRNF
no factor from 2^61 to 2^62
2013-02-13Sid & AndyNF
no factor from 2^60 to 2^61
2012-01-27alpertronNF-PM1
B1=10000000, B2=200000000, E=12
2009-01-24Sturle SundeNF
no factor from 2^59 to 2^60
2008-12-31Sturle SundeNF
no factor from 2^58 to 2^59
2008-11-27GrunwalderGIMPNF-PM1
B1=2000000, B2=200000000, E=12