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 L436, one of those codes.
Code name ( *): L436 (See the descriptive data below.)
Persons ( *): 1 (counting humans only)
Projects ( *): 1 (counting projects only)
Display (HTML): Andersen2, Gcwsieve, MultiSieve, PrimeGrid, LLR
Number of primes: total 1
Unverified Primes: 0 (prime table entries marked 'Composite','Untested', or 'InProcess')
Score for Primes ( *): total 45.0970, on current list 45.0970 (normalized score 3)
Entrance Rank ( *): mean 37.00 (minimum 37, maximum 37)
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The discovery was made by Lasse Mejling Andersen of
Denmark using an Intel Celeron 2.80 GHz with 512 MB RAM.
This machine took a little over 3 hours and 27 minutes to
test using the LLR program. The prime was verified on 7
Aug 2007, 15:25:07 UTC, by Mike Ingram using an Intel
Pentium D 3.2 GHz with 2 GB RAM. This machine took a
little over 2 hours 52 minutes to test using the LLR
This is PrimeGrid's first Woodall prime. Just under 65000
tests were completed by 1332 users using over 2700
Using a single PC would have taken years to find this
prime. So this timely discovery would not have been
possible without the hundreds of volunteers who
contributed their spare CPU cycles. A special thanks to
everyone who contributed their advice and/or computing
power to the search - especially Brian Rodenkirk, Joseph
M. Osiecki, Geoffrey Reynolds, and Paul Underwood.
PrimeGrid's Woodall Prime Search will continue to search
for even larger Woodall Primes. To join the search please
Below is additional information about this entry.
Display (text): Andersen2, Gcwsieve, MultiSieve, PrimeGrid, LLR
Display (short): Andersen2
Database id: 3337 (do not use this database id, it is subject to change)
Proof program: LLR The primes from this code accounts for 0.020% of the (active) primes and 0.004% of the (active) score for this program.
Entry last modified: 2019-10-20 10:20:14