Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Lucas-Lehmer test results of Mersenne Numbers

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3 Later Factored LL test results

Exponent
User name
Computer name
Residue
Shift count
Error code
#LL
#PRP
Software
Date found
13967Unknown55C503Unknown, (aka U)
13967George WoltmanCF6B7C131D05D5C503Woltman, Prime95, first web release, (aka W4)
13967Brian J. BeesleyCF6B7C131D05D5C503Mac, John Sweeney, v1.4, (aka J3)