20211201, 05:36  #958 
Jun 2003
5·29·37 Posts 
Unlike previous versions which run into diminishing returns the more RAM you throw at it, 30.8 efficiency keeps on going up as you increase your RAM allocation. So any recommendation that doesn't take into account the available RAM is going to be suboptimal (and not just by a little)
We don't need to cut it so close to the required probabilities. Pick reasonably large B1, let P95 choose the B2. We'll still complete the range _much_ faster than we would with previous versions. If it turns out that we're getting much larger probabilities than is needed, we can dial back B1 a bit. Last fiddled with by axn on 20211201 at 05:37 Reason: s/that/than 
20211202, 00:35  #959 
P90 years forever!
Aug 2002
Yeehaw, FL
1ED0_{16} Posts 
I had wanted to keep 30.8 out of the general public's eye, but someone created a 30.8 thread.
I've moved all the 30.8 posts there: https://www.mersenneforum.org/showthread.php?t=27366 We now return this thread to its regular programming.... 
20211202, 05:07  #960 
1976 Toyota Corona years forever!
"Wayne"
Nov 2006
Saskatchewan, Canada
3·11·157 Posts 
Some stats in the 2x.xM ranges.
No crashes or weird results so far...
i52500 with 12GB RAM allocated; B1/B2 of 600K/90M: 28.0M exponent Stage 1: 51 Min Stage 2: 55 Min i53570 with 14GB RAM; B1/B2 of 600K/90M: 24.7M exponent Stage 1: 36 Min Stage 2: 31 Min i53570 with 6.5GB RAM; B1/B2 of 600K/75M: 24.7M exponent Stage 1: 35 Min Stage 2: 51 Min i53570K with 3GB RAM; B1/B2 of 600K/75M: 24.7M exponent Stage 1: 31 Min Stage 2: 85 Min i53570 with 14GB RAM; B1/B2 of 600K/90M: 6.1M exponent Stage 1: 7 Min Stage 2: 3 Min i53570K with 3GB RAM; B1/B2 of 600K/75M: 6.1M exponent Stage 1: 6 Min Stage 2: 5 Min My take: in the 2x.xM ranges 12+ GB seems decent 6.5GB soso 3GB not enough ... better suited for the lower exponents (i.e 6M) P.S. 2 cases now trying to stop Prime95 early in Stage 2; right after Stage 2 Init complete. And it takes a very long time ... more than 5 minutes and still waiting. ...it stopped only after Stage 2 completed. Last fiddled with by petrw1 on 20211202 at 05:39 Reason: last line 
20211202, 06:05  #961 
Jun 2003
5×29×37 Posts 

20211202, 12:26  #962  
Aug 2002
Buenos Aires, Argentina
1,447 Posts 
Quote:
Code:
[Worker #1] Pminus1=1,2,9325159,1,50000000,50000000000,"8056937377,16207126343,95788033249,799651034569,2894827758689,1416068886691577,36098431074477463,635315498297290933609,6214794856879965540791" 

20211202, 13:02  #963 
Jun 2003
5365_{10} Posts 

20211202, 13:19  #964 
Aug 2002
Buenos Aires, Argentina
1,447 Posts 
My system has 16 GB of RAM, and I have several programs running at the same time. That's why I give 8 GB to Prime95. Otherwise the system would run slower.

20211202, 13:42  #965 
Aug 2002
3×2,819 Posts 
We have 256GB of memory.
If you want a test/benchmark done just post the worktodo entry that we need to use. 
20211202, 14:02  #966  
1976 Toyota Corona years forever!
"Wayne"
Nov 2006
Saskatchewan, Canada
3×11×157 Posts 
Quote:
It's at the doctor. I'll have it later today. 

20211202, 16:51  #967  
Jun 2003
14F5_{16} Posts 
Quote:
Yes, with only 16GB available RAM, I understand that you can't give more. Unfortunately, you could've saved several days of computation if you had more RAM. 

20211203, 19:51  #968 
1976 Toyota Corona years forever!
"Wayne"
Nov 2006
Saskatchewan, Canada
5181_{10} Posts 

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