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:





MnDetails
76958237
Composite: proven not-prime with Lucas-Lehmer test
No factors below 275
TF target 274
P-1
B1 = 695000
B2 = 12857500
LL
StatusDateUserResidueShiftSoftware
Verified2017-07-03curtisc752BA3E9C190D3C054891671Windows Service,Prime95,v28.7,build 1
Verified2023-03-19Reed_Young752BA3E9C190D3C064444668Linux 64-bit,Prime95,v30.8,build 18
History
DateUserTypeResult
2023-03-19Reed_YoungC-LL752BA3E9C190D3C0
2017-07-03curtiscC-LL752BA3E9C190D3C0
2016-04-03Mark RoseNFno factor TF: 62-64
2016-02-17Chris SmithNFno factor TF: 74-75
2015-10-23RMAC9.5NF-PM1B1=695000, B2=12857500
2015-04-19ChuckNFno factor TF: 73-74
2011-12-02DRHNFno factor TF: 72-73
2011-12-02DRHNFno factor TF: 71-72
2011-12-02DRHNFno factor TF: 70-71
2011-12-02DRHNFno factor TF: 69-70
2011-12-02DRHNFno factor TF: 68-69
2011-04-04Carsten KossendeyNFno factor TF: 67-68
2011-04-04Carsten KossendeyNFno factor TF: 65-67
2011-01-25GrunwalderGIMPNFno factor TF: 64-65
2004-06-12markrNFno factor TF: 1-62
2000-08-10-anonymous-NFno factor TF: 1-53