Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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Exponent Range:










MnStatusDetails
308773TF
No factors below 268
TF target 244
TF below 2^97 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 1000000000
B2 = 36087207726570
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000201 / 1566
Estimated T-Level: 30.6 ⓘ
LL
StatusDateUserResidueShift
VerifiedDavid Slowinski6F50
VerifiedUnknown06F50
VerifiedKlaus Kastens1BEF992FFE5706F50
VerifiedEivind Triel1BEF992FFE5706F5169902
Verified2001-12-08Dennis Pope1BEF992FFE5706F5254026
History
DateUserTypeResult
2022-12-31masserNF-PP1
Start=6/5, B1=20000000, B2=620000000
2022-12-26masserNF-PP1
Start=196/11, B1=20000000, B2=620000000
2022-12-24masserNF-PP1
Start=2/7, B1=20000000, B2=620000000
2022-09-27Oliver KruseNF-PM1
B1=1000000000, B2=36087207726570
2022-06-09Gordon SpenceNF
no factor from 2^67 to 2^68
2022-03-07LordJuliusNF
no factor from 2^54 to 2^55
2021-02-08YxinityNF
no factor from 2^66 to 2^67
2019-11-22Gordon SpenceNF
no factor from 2^65 to 2^66
2018-01-18Gordon SpenceNF
no factor from 2^64 to 2^65
2015-12-20Gordon SpenceNF
no factor from 2^63 to 2^64
2015-12-20Gordon SpenceNF
no factor from 2^62 to 2^63
2015-07-19NRNF
no factor from 2^61 to 2^62
2012-10-31alpertronNF-PM1
B1=100000000, B2=2000000000, E=12
2012-08-22alpertronNF-PM1
B1=10000000, B2=200000000, E=12
2012-04-25David CampeauNF
no factor from 2^60 to 2^61
2009-01-24Sturle SundeNF
no factor from 2^59 to 2^60
2008-12-31Sturle SundeNF
no factor from 2^58 to 2^59
2008-11-17GrunwalderGIMPNF-PM1
B1=2000000, B2=200000000, E=12