On 13 Aug 2007, 1:42:08 UTC, PrimeGrid's Woodall Prime
Search found the 32nd and largest known to date Woodall
The discovery was made by Stephen Kohlman of Canada using
an Intel C2D 6300 @ 1.86 GHz with 1 GB RAM. This computer
took a little over 5 hours and 41 minutes to test using
the LLR program. Stephen is a member of Team Canada.
The prime was verified on 20 Aug 2007, 2:40:57 UTC, by
Jeff Morales of the United States using an Intel Pentium
4 @ 2.8 GHz with 512 MB RAM. This computer took a little
over 10 hours 27 minutes to test using the LLR program.
Jeff is a member of team SETI.USA.
This is PrimeGrid's second Woodall prime. Since the
search began, just under 85,000 tests have been completed
by 2555 users using over 5100 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, Lennart
Vogel, Joseph M. Osiecki, Geoffrey Reynolds, and Paul
Additional thanks to all the sievers who prepared the
work for PrimeGrid: Sievers
PrimeGrid's Woodall Prime Search will continue to search
for even larger Woodall Primes. To join the search please
visit PrimeGrid: www.primegrid.com