Proof-code: L436

Previous Next Random

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 1)

Entrance Rank (*): mean 37.00 (minimum 37, maximum 37)

Descriptive Data: (report abuse)

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 program.

This is PrimeGrid's first Woodall prime. Just under 65000 tests were completed by 1332 users using over 2700 computers.

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 visit: PrimeGrid: www.primegrid.com

I am a member of this code and I would like to:

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 0.021% of the (active) primes and 0.001% of the (active) score for this program.

Entry last modified: 2024-04-18 11:37:15

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 1)
Entrance Rank (*):	mean 37.00 (minimum 37, maximum 37)

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 0.021% of the (active) primes and 0.001% of the (active) score for this program.
Entry last modified:	2024-04-18 11:37:15