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

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MnStatusDetails
42019361Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
64388896285216748425692272.42019-04-20 05:37:50
LL
StatusDateUserResidueShift
Verified (Factored)2009-05-07Tom Mueller8D78F6D81804953B3864660
Verified (Factored)2016-10-08ANONYMOUS8D78F6D81804953B25876184
History
DateUserTypeResult
2019-04-20ConductorF
Factor: 6438889628521674842569 / TF: 72-73
2016-10-08ANONYMOUSC-LL
8D78F6D81804953B
2015-09-13AirSquirrelsNF
no factor from 2^71 to 2^72
2015-02-26David CampeauNF
no factor from 2^70 to 2^71
2015-01-15chalsallNF
no factor from 2^69 to 2^70
2014-03-02LaurVNF
no factor from 2^68 to 2^69
2009-05-07Tom MuellerC-LL
8D78F6D81804953B
2009-03-30Tom MuellerNF-PM1
B1=475000, B2=6887500