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Old 2017-09-03, 06:16   #1
NookieN
 
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Default 100M exponent FFT size?

Well I've been Googling and searching here for it for half an hour and I still can't find it. What is the FFT size for the current M332 exponents? I'm guessing it's about 17920k but I want to benchmark the correct size.
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Old 2017-09-03, 14:39   #2
Uncwilly
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Mersenne.ca says it is larger:
http://www.mersenne.ca/credit.php?wo...tton=Calculate
18432K
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Old 2017-09-04, 01:58   #3
ATH
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CUDALucas also says 18432K (18M).

Prime95 says it is near the border between 17920K and 18432K but the round off error was too high to use 17920K.


Edit: Round off error was too high to use 17920K.

Last fiddled with by ATH on 2017-09-04 at 11:11
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Old 2017-09-04, 22:11   #4
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Great, thank you both. At 18432K it looks like it would take about 61 days on the Xeon I have. Tempting, though I might wait for when it's not 100 degrees in my office.
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