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
26571667
Composite: proven not-prime with Lucas-Lehmer test
No factors below 275
TF target 270
P-1
B1 = 600000
B2 = 439584600
LL
StatusDateUserResidueShiftSoftware
Verified2004-12-23David J. Stucki45C25486E901FB422991175Windows,Prime95,v22,NT service,(aka WY5)
Verified2012-07-06Dubslow45C25486E901FB420CUDALucas v2.04 Beta
History
DateUserTypeResult
2021-12-12LuminescenceNF-PM1B1=600000, B2=439584600
2021-10-17TheJudgerNFno factor TF: 74-75
2021-09-26TheJudgerNFno factor TF: 73-74
2021-08-25TheJudgerNFno factor TF: 72-73
2021-08-25TheJudgerNFno factor TF: 71-72
2021-05-05mikrNFno factor TF: 70-71
2017-04-17ramgeisNFno factor TF: 69-70
2012-07-06DubslowC-LL45C25486E901FB42
2011-12-17Roy OswaldNFno factor TF: 68-69
2011-10-12David CampeauNFno factor TF: 67-68
2005-04-26Team Prime RibNFno factor TF: 1-67
2005-04-02Team Prime RibNFno factor TF: 1-67
2005-02-23Team Prime RibNFno factor TF: 1-67
2005-02-12Team Prime RibNFno factor TF: 1-67
2004-12-23David J. StuckiC-LL45C25486E901FB42
2004-11-22David J. StuckiNF-PM1B1=320000, B2=8400000
2004-11-03Team Prime RibNFno factor TF: 1-67
2004-07-13-anonymous-NFno factor TF: 1-62