Proof-code: x42
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  Samuel Yates began, and this site continues, a database of the largest known primes. Primes in that database are assigned a proof-code to show who should be credited with the discovery as well as what programs and projects they used. (Discoverers have one prover-entry, but may have many proof-codes because they use a variety of programs...) This page provides data on x42, one of those codes.

Code name (*):x42   (See the descriptive data below.)
Persons (*):3 (counting humans only)
Projects (*):0 (counting projects only)
Display (HTML):Leyland, Water, Broadhurst, OpenPFGW
Number of primes:total 2
Unverified Primes:0 (prime table entries marked 'Composite','Untested', or 'InProcess')
Score for Primes (*):total 32.7912

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Descriptive Data: (report abuse)
Factorization help was provided by Paul Leyland. The generalized Lucas number U(12071,-1,2521) was proven prime by an implementation of the Williams-Lenstra method, using Pari-GP.
Below is additional information about this entry.
Display (text):Leyland, Water, Broadhurst, OpenPFGW
Display (short):Leyland, Water & Broadhurst
Database id:152 (do not use this database id, it is subject to change)
Proof program:unknown
Entry last modified:2017-10-24 02:50:12