20201218, 23:45  #243 
P90 years forever!
Aug 2002
Yeehaw, FL
2^{3}×919 Posts 

20201219, 02:03  #244  
Jul 2003
wear a mask
3×11×47 Posts 
If a factor is not found, does the new code report the requested B2 or the computed B2? In my initial results,
These are the lines I tried: Quote:
NEVERMIND: I'm wrong  misread the outputs. Code reported the B2 it used, which was not adequate in this case... I'll try to see how much memory to allocate to get the desired factor. Last fiddled with by masser on 20201219 at 02:09 

20201219, 02:34  #245 
P90 years forever!
Aug 2002
Yeehaw, FL
7352_{10} Posts 
A present for your project  I was comparing P1 speeds for 30.3 vs. 30.4 and found this:
processing: P1 factor 74415394148849438918449121 for M16963013 (B1=500,000, B2=20,500,000) 
20201219, 04:28  #246 
1976 Toyota Corona years forever!
"Wayne"
Nov 2006
Saskatchewan, Canada
10710_{8} Posts 

20201219, 06:19  #247  
P90 years forever!
Aug 2002
Yeehaw, FL
2^{3}·919 Posts 
Quote:
30.3 did 17.3% of stage 2 to B2=10M in 470 seconds. 30.4 did 43.4% of stage 2 to B2=20.5M in 1940 seconds. My extrapolation is 30.3 would have taken 2480 seconds to do what 30.4 did. Last fiddled with by Prime95 on 20201219 at 06:22 

20201219, 06:52  #248 
Jun 2003
2^{3}·607 Posts 
@George: Can you share the B2 selection logic (source code)? I want to understand/predict how memory allocation will affect this. Does the logic take into account MaxHighMemWorkers / workerspecific memory settings?

20201219, 17:35  #249 
1976 Toyota Corona years forever!
"Wayne"
Nov 2006
Saskatchewan, Canada
2^{3}×569 Posts 
Are the save files compatible. I'm currently at 29.8

20201219, 20:06  #250  
P90 years forever!
Aug 2002
Yeehaw, FL
2^{3}·919 Posts 
Quote:
The source code will be made available, but emulating the B2 selection logic will not be easy. See post #242 

20201219, 20:13  #251  
"Oliver"
Sep 2017
Porta Westfalica, DE
435_{10} Posts 
Quote:
An ECM got: M630901, B1 = 250k, B2 =155 * B1 @ 6 GB availible. Stage 1 took around 0.5h, stage 2 took 0.25h. Edit: @George, thanks for a rough clarifications. Last fiddled with by kruoli on 20201219 at 20:14 Reason: Crosspost. 

20201220, 00:28  #252 
Jul 2003
wear a mask
3017_{8} Posts 
Could someone teach me how to find the sigma that was used to find an ECM factor from the mersenne.org website?
I'm trying to test that the new ECM in version 30.4 recovers known factors without running hundreds of curves. Last fiddled with by masser on 20201220 at 00:29 
20201220, 02:40  #253 
Jun 2003
2^{3}×607 Posts 
Potential P1 (display) bug:
Stage 2 % resets to zero once a batch of relative primes is processed. At least, that's what I think is happening  haven't completed a full P1 run yet. 
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