20211206, 06:52  #111 
P90 years forever!
Aug 2002
Yeehaw, FL
5^{2}·311 Posts 

20211206, 08:09  #112 
"GIMFS"
Sep 2002
Oeiras, Portugal
2^{2}×3×127 Posts 
Prime95 (30.8 build 3) silently stopped working at the beginning of P1 stage 2  last messages were about setting the affinities for the 3 helper threads (it´s a 4 core machine). Several hours later, Task Manager was showing 0% CPU and 2.3 GB of RAM in use  it is allowed to use up to 11 GB, which it normally does). The green icon was visible in the tray, and right clicking it produced the usual menu; selecting stop would display the message "stopping all working windows" in the comms window, but nothing actually happened. I had to use Task Manager to kill the process.
The machine had been running build 3 for many hours without any problem, and had already tested several exponents Am I the only one to experience this problem? I just noticed ATH posted a similar situation. In my case I had been running build 3 from the beginning of stage 1, tho. Last fiddled with by lycorn on 20211206 at 08:11 Reason: Cross posting 
20211206, 10:10  #113  
P90 years forever!
Aug 2002
Yeehaw, FL
1E5F_{16} Posts 
Quote:


20211206, 13:51  #114 
Aug 2002
8408_{10} Posts 

20211206, 14:17  #115 
Jun 2003
2·3^{2}·293 Posts 
Nice! A condensed summary of the run:
Code:
Optimal P1 factoring of M108028051 using up to 231424MB of memory. Assuming no factors below 2^76 and 1.1 primality tests saved if a factor is found. Optimal bounds are B1=755000, B2=479779000 Chance of finding a factor is an estimated 6.32% Using AVX512 FFT length 5760K, Pass1=3K, Pass2=1920, clm=1, 18 threads M108028051 stage 1 complete. 2178208 transforms. Total time: 2516.060 sec. Conversion of stage 1 result complete. 5 transforms, 1 modular inverse. Time: 45.094 sec. Switching to AVX512 FFT length 7056K, Pass1=1344, Pass2=5376, clm=2, 18 threads Using 229108MB of memory. D: 6930, 720x3371 polynomial multiplication. Stage 2 init complete. 20328 transforms. Time: 211.952 sec. M108028051 stage 2 complete. 721861 transforms. Total time: 2481.481 sec. Stage 2 GCD complete. Time: 24.941 sec. M108028051 completed P1, B1=755000, B2=492127020 
20211206, 16:25  #116 
Aug 2002
Buenos Aires, Argentina
1422_{10} Posts 
Assuming 10% of the users have huge amounts of RAM, that will translate to only 0.2%

20211206, 16:40  #117 
"Curtis"
Feb 2005
Riverside, CA
7×11×67 Posts 
No, because even 5% of users is plenty to P1 all the wavefront exponents. Axn is saying 2% more factors would be found, saving that many prp tests and speeding the project by 2%.

20211206, 16:48  #118  
"James Heinrich"
May 2004
exNorthern Ontario
13·277 Posts 
Just playing around with 30.8b3.win64 (on M859433, yes I know it's prime) and found some odd behaviours. i73930K, 64GB (32GB allocated).
Tried with the default 6 threads and it froze as described above. Limited it to 1 thread and it worked: Quote:
I'm not sure the "100% chance of factor" is quite right either. 

20211206, 16:59  #119  
Jun 2003
2×3^{2}×293 Posts 
I think you may have messed up the worktodo line. To wit:
Quote:
Yes, it is normal for it to use larger than the specified B2. 

20211206, 17:45  #120 
Aug 2002
Buenos Aires, Argentina
2·3^{2}·79 Posts 
We do not know if these people will accept doing only P1. Some people only wants to perform PRP because of the prizes. So they would use multithreading to run as many PRP as possible.

20211206, 17:46  #121  
"James Heinrich"
May 2004
exNorthern Ontario
13×277 Posts 
Pfactor=1,2,859433,1,0,10 was what I used for the above. (I came across this exponent on my "worst P1" page, before I excluded prime exponents, and it had the erroneous TF=0 level). Perhaps Prime95 should apply some sanity checks to specified TF levels?
Running it again with Pfactor=1,2,859433,1,40,10 and the numbers come up more sane: Quote:
One side oddity: Sending result to server: UID: JamesHeinrich, M859433 completed P1, B1=82000, B2=5164589430, Wi4: 25B7808A But the result shows up as "Anonymous". 

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