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On 13 Aug 2007, 1:42:08 UTC, PrimeGrid's Woodall Prime
Search found the 32nd and largest known to date Woodall
prime.
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 Underwood.
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
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