Thread: AVX-ECM
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Old 2020-11-29, 05:19   #75
Prime95
P90 years forever!
 
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Aug 2002
Yeehaw, FL

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Have you played with improving PRAC?

I recently did and gained one or two percent. This may be because prime95 can store data FFTed which may change the costing functions. A double costs 10 transforms, an add costs 12 transforms. Also, prime95 is usually dealing with larger numbers and can afford to spend a little more time searching for the best chain.

Glad to share the C code for the changes.
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