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
42096917
Composite: proven not-prime with Lucas-Lehmer test
No factors below 273
TF target 272
P-1
B1 = 710000
B2 = 710000
LL
StatusDateUserResidueShiftSoftware
Verified2008-08-07Tim Keighley042257895EB799DA7547765Windows,Prime95,v24 final,(aka Wc1)
Bad2017-09-23Christian GeschwentnerC1AA72D026383EFB9621CUDALucas v2.06beta
Verified2017-09-24ATH042257895EB799DA21055989CUDALucas v2.05.1
History
DateUserTypeResult
2018-08-12-anonymous-NFno factor TF: 72-73
2017-09-24ATHC-LL042257895EB799DA
2017-09-23Christian GeschwentnerC-LLC1AA72D026383EFB
2015-08-25-anonymous-NFno factor TF: 71-72
2015-03-02Mark RoseNFno factor TF: 70-71
2015-01-18Mark RoseNFno factor TF: 69-70
2013-12-29bayanneNFno factor TF: 68-69
2008-08-07-anonymous-C-LL042257895EB799DA
2008-06-02-anonymous-NF-PM1B1=710000
2007-07-24ITSNFno factor TF: 1-68