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
78227371Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 276
TF target 275
P-1
B1 = 675000
B2 = 13162500
LL
StatusDateUserResidueShift
Verified2016-02-01KCBE0A4D32987DB87269981782
Verified2025-07-14Luke DurantBE0A4D32987DB8720
History
DateUserTypeResult
2025-07-14Luke DurantC-LL
BE0A4D32987DB872
2024-08-14Sid & AndyNF
no factor from 2^75 to 2^76
2016-02-01KCC-LL
BE0A4D32987DB872
2015-11-26NesowaNF-PM1
B1=675000, B2=13162500, E=6
2015-11-19dh1NF
no factor from 2^74 to 2^75
2014-09-28brilongNF
no factor from 2^73 to 2^74
2014-09-28brilongNF
no factor from 2^72 to 2^73
2014-09-28brilongNF
no factor from 2^71 to 2^72
2013-01-13Bill StaffenNF
no factor from 2^70 to 2^71
2011-11-01rduerrNF
no factor from 2^66 to 2^70
2011-06-18Serge BatalovNF
no factor from 2^64 to 2^66