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Old 2022-05-06, 23:31   #5
paulunderwood
 
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Sep 2002
Database er0rr

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Quote:
Originally Posted by ATH View Post
So 71 years of CPU time for 51,000 digits vs 20 months * 64 cores ~ 107 years of CPU time for 49,081 digits.
But depends on how comparable those CPU core years are.

51,000 digits is supposed to take (51000/49081)^3.75 ~ 15% longer ? At least with Primo.
It is 50,001 digits. My estimate for Primo is (50001/49081)^4 = 1.077 or 7.7% longer.

I used quad channel DDR 2400MHz for R49081's certification. I guess they were using octa channel most of the time, but that does not explain their speed fully. There is marginal gain by having fewer stage 2 steps to do.

Last fiddled with by paulunderwood on 2022-05-06 at 23:53
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