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Old 2021-09-23, 19:12   #443
kriesel
 
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"TF79LL86GIMPS96gpu17"
Mar 2017
US midwest

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Let's ballpark these for ppm of system productivity.

P-1 GCD 1 hour at 880M on Xeon Phi 7210. I have another similar-exponent P-1 that's projecting a week left to go for about half of stage 2. So let's assume 30 days for both stages on 880M, 7210; 60 minutes x 2 stages / (30x24x60) x 15/16 ~2600 ppm = 0.26% of P-1 time, which is ~1/40 of PRP time, so ~62. ppm of exponent (TF + P-1 + PRP) time. That might become worthwhile to pursue at some point, depending on what other optimization opportunities remain and effort needed.

Preallocate PRP proof space 3 minutes at 500M on Xeon Phi 7210.
Forecast PRP time 328.5 days ~473040 minutes. 3/473040 x 15cores/16cores= 6. ppm of PRP time.
That would need to be a very quick modification to be worth the programming and test time. Seems unlikely.
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