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#13 | |
Random Account
Aug 2009
Not U. + S.A.
2·31·41 Posts |
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#14 | |
"TF79LL86GIMPS96gpu17"
Mar 2017
US midwest
737510 Posts |
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Yes. Well, it optimizes the bounds selection given projected odds of finding a factor versus many bounds values and run time estimates for P-1 and PRP and allowed ram usage, for maximum expected computing time savings.
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Last fiddled with by kriesel on 2022-11-16 at 18:43 |
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#15 |
"James Heinrich"
May 2004
ex-Northern Ontario
100716 Posts |
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Prime95 selects optimal bounds based on the available RAM vs probability of finding a factor vs expected time saved not doing PRP when factor found. Here we don't want "really high" bounds, we want optimal bounds to maximize number of exponents factored (and therefore DC/PRP saved) per time. More RAM will give slightly better chance of factor and slightly longer runtime, but as long as you have at least (as requested in the thread title) 24GB allocated to Prime95 it should give you decent bounds. These assignments here are exponents that have been LL-tested once, but with bad P-1, so running a decent P-1 could potentially save one PRP test (and associated certification). We don't want to spend any more effort looking for factors than is necessary to balance the time savings of finding a few factors, to optimize overall GIMPS throughput.
Last fiddled with by James Heinrich on 2022-11-16 at 18:37 |
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#16 |
"/X\(‘-‘)/X\"
Jan 2013
60438 Posts |
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Will 24 GB be sufficient for all these assignments under 100M?
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#17 |
"James Heinrich"
May 2004
ex-Northern Ontario
11×373 Posts |
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Sufficient, yes. If you have more RAM by all means make use of it, but 24GB should be fine to give a "decent" P-1 effort, far better than the poor P-1 that was done previously.
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#18 |
"TF79LL86GIMPS96gpu17"
Mar 2017
US midwest
53·59 Posts |
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Here's one we would not have gotten with ordinary bounds, and its factor is 102 bits.
https://www.mersenne.ca/exponent/85408633 |
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#19 |
"TF79LL86GIMPS96gpu17"
Mar 2017
US midwest
11100110011112 Posts |
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Mark or anyone can contribute to good first-test wavefront P-1. I have mine configured to queue up some of that automatically if they get close to running out of retry before dc assignments. Good first P-1 prevents the need for retry, and reduces unnecessary first prp.
Last fiddled with by kriesel on 2022-11-28 at 16:48 |
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#20 | |
"/X\(‘-‘)/X\"
Jan 2013
60438 Posts |
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#21 |
"/X\(‘-‘)/X\"
Jan 2013
60438 Posts |
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#22 |
"James Heinrich"
May 2004
ex-Northern Ontario
100078 Posts |
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