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

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MnStatusDetails
428801TF
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 = 80000000
B2 = 1720512333540
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000201 / 1566
Estimated T-Level: 30.6 ⓘ
LL
StatusDateUserResidueShift
VerifiedDavid Slowinski38DD0
VerifiedJay R. Hill586B87A77C67B8DD0
VerifiedEivind Triel586B87A77C67B8DD375046
Verified2002-02-10Dennis Pope586B87A77C67B8DD157312
History
DateUserTypeResult
2023-10-15masserNF-PM1
B1=80000000, B2=1720512333540
2023-05-19JossNF-PM1
B1=2988916, B2=48271423200
2023-01-22masserNF-PP1
Start=6/5, B1=20000000, B2=640000000
2023-01-15masserNF-PP1
Start=2/7, B1=20000000, B2=640000000
2023-01-15masserNF-PP1
Start=118/29, B1=20000000, B2=620000000
2023-01-15JossNF-PM1
B1=2988916, B2=16747130400
2022-02-06LordJuliusNF
no factor from 2^67 to 2^68
2022-02-06LordJuliusNF
no factor from 2^66 to 2^67
2018-12-11Gordon SpenceNF
no factor from 2^65 to 2^66
2017-12-21Gordon SpenceNF
no factor from 2^64 to 2^65
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-11-16Gordon SpenceNF
no factor from 2^63 to 2^64
2015-11-16Gordon SpenceNF
no factor from 2^62 to 2^63
2015-07-16NRNF
no factor from 2^61 to 2^62
2013-01-08markrNF-PM1
B1=25000000, B2=1000000000, E=12
2012-05-29JossNF-PM1
B1=2987916
2010-08-05Rob_DeeNF-PM1
B1=1000000, B2=2000000, E=6
2010-08-04Rob_DeeNF-PM1
B1=500000, B2=1000000
2010-06-05Architects CubedNF
no factor from 2^60 to 2^61