Hey everybody. Now that our Fermat testing is starting to wind down
I've decided to make available the source I've written for it.
www.glue.umd.edu/~jasonp/f24v131.zip
The code there is heavily optimized for the UltraSPARC processor,
and includes gobs and gobs of sparc assembly language. Squaring
times are as follows:
ultra-1 ultra-1 ultra-2i
number bits 143MHz 167MHz 300MHz
F22 4.2M .229 .196 .167
F23 8.4M .465 .404 .322
F24 16.8M 1.08 .885 .700
F25 33.6M 1.58
The GIMPS speed page places the Ultra-2i times in the neighborhood
of a PII-300 (a Pepin test takes about the same time as an LL test
of similar size, maybe a little less).
So, a few questions:
How do these times compare with MacLucasUnix on an Ultra, or with
Prime95 for the really big sizes?
How fast does the program run on a really big Ultra, i.e. a 440MHz
server with piles of RAM and a 4MB cache?
Are there enough Ultras out there to justify making a fast LL test out
of this code? I'd be willing to try, but only if there's sufficient
interest; the code won't run on normal sparcs, my time is very
limited I don't want to expend a considerable amount of
energy on something no one will use. Would anyone like to help?
jasonp
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