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:










MnStatusDetails
7156727Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 272
TF target 267
P-1
B1 = 1993731
B2 = 2492249760
ECM
DigitsB1Curves
25500006 / 280
Estimated T-Level: 20.1
LL
StatusDateUserResidueShift
Verified2000-02-09INTERSHOP Communications5ADB78DC1DFDB7360
Verified2002-01-15Ars Technica Team Prime Rib5ADB78DC1DFDB7362711885
History
DateUserTypeResult
2022-01-27LaurVNF-PM1
B1=1993731, B2=2492249760
2022-01-26LaurVNF-PM1
B1=1993731
2021-10-11SRBaseNF
no factor from 2^71 to 2^72
2021-08-27SRBaseNF
no factor from 2^70 to 2^71
2021-08-19SRBaseNF
no factor from 2^69 to 2^70
2020-05-15TJAOINF
no factor from 2^68 to 2^69
2018-07-24ramgeisNF
no factor from 2^67 to 2^68
2016-10-24Gordon SpenceNF
no factor from 2^66 to 2^67
2015-06-21VictordeHollanderNF
no factor from 2^65 to 2^66
2014-02-06lycornNF
no factor from 2^64 to 2^65
2014-02-02NesowaNF
no factor from 2^63 to 2^64
2011-12-22James HeinrichNF-PM1
B1=135000, B2=2936250, E=6