mersenneforum.org Prime95 30.8 (big P-1 changes, see post #551)
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2022-08-03, 19:26   #650
James Heinrich

"James Heinrich"
May 2004
ex-Northern Ontario

3·23·59 Posts

Quote:
 Originally Posted by Prime95 I'm not familiar with "Fishhawk Fall". If this is a not-yet-released product...
Fishlake Falls is the platform name for Sapphire Rapids-X Xeon CPUs
A decent overview: https://wccftech.com/intel-fishhawk-...-workstations/

Last fiddled with by James Heinrich on 2022-08-03 at 19:28

 2022-08-06, 23:38 #651 JuanTutors     "Juan Tutors" Mar 2004 57110 Posts Is there a table or formula for appropriate B2/B1 values as a function of ram usage for P95v30.8b15? Trying to figure out if B2/B1=73 for 27 GB ram is appropriate.
2022-08-07, 00:22   #652
James Heinrich

"James Heinrich"
May 2004
ex-Northern Ontario

3×23×59 Posts

Quote:
 Originally Posted by JuanTutors Is there a table or formula for appropriate B2/B1 values as a function of ram usage for P95v30.8b15?
It's a complex interplay between RAM, exponent, chance of factor (previous TF, new B1/B2). It's probably safe to say that if Prime95 selected those bounds for that assignment, then it's the appropriate bounds.

2022-08-07, 02:25   #653
JuanTutors

"Juan Tutors"
Mar 2004

571 Posts

Quote:
 Originally Posted by James Heinrich It's a complex interplay between RAM, exponent, chance of factor (previous TF, new B1/B2). It's probably safe to say that if Prime95 selected those bounds for that assignment, then it's the appropriate bounds.
Got it. 100M digit Mersenne factored to 2^80, B1=1369000 and B2=96916000. Given how fast this is compared to a PRP test, if I happen to be on the same version of P95, I might increase those values manually next time just because it's so fast!

2022-08-07, 02:41   #654
James Heinrich

"James Heinrich"
May 2004
ex-Northern Ontario

3×23×59 Posts

Quote:
 Originally Posted by JuanTutors I might increase those values manually next time just because it's so fast!
You can, of course, but the auto-selected values are carefully balanced to give an optimal balance of time spent on P-1 vs chance of finding a factor. You can increase the bounds and have a higher chance of finding a factor on this exponent, but your overall rate of factors found per time will decrease (the amount of time spent goes up faster than the chance of finding a factor).

2022-08-07, 05:15   #655
axn

Jun 2003

5×1,087 Posts

Quote:
 Originally Posted by JuanTutors Got it. 100M digit Mersenne factored to 2^80, B1=1369000 and B2=96916000. Given how fast this is compared to a PRP test, if I happen to be on the same version of P95, I might increase those values manually next time just because it's so fast!
If it is possible to upgrade the RAM in your computer, upgrade it to the maximum capacity and allocate the maximum RAM you can to the program. It will automatically choose _much_ higher bounds.

2022-08-07, 05:32   #656
JuanTutors

"Juan Tutors"
Mar 2004

10738 Posts

Quote:
 Originally Posted by axn If it is possible to upgrade the RAM in your computer, upgrade it to the maximum capacity and allocate the maximum RAM you can to the program. It will automatically choose _much_ higher bounds.
Unfortunately I only have 32GB ram and I allocated 27GB. Maybe I'll get more ram on my next laptop.

 2022-08-09, 17:48 #657 Prime95 P90 years forever!     Aug 2002 Yeehaw, FL 2×52×163 Posts 30.8 build 16 released for Windows and Linux 64-bit. A bug fix for Ryzen 7000.
2022-08-09, 22:53   #658
James Heinrich

"James Heinrich"
May 2004
ex-Northern Ontario

3×23×59 Posts

Quote:
 Originally Posted by Prime95 30.8 build 16 released for Windows and Linux 64-bit
https://www.mersenne.org/ftp_root/gi...8b16.win64.zip
https://www.mersenne.org/ftp_root/gi...linux64.tar.gz

2022-08-10, 00:54   #659
Prime95
P90 years forever!

Aug 2002
Yeehaw, FL

2·52·163 Posts

Quote:
 Originally Posted by James Heinrich @George: you're still not comfortable putting v30.8 on the homepage (even though it's the default download on the download page)?
Just being lazy.

 2022-08-11, 20:59 #660 Jwb52z     Sep 2002 5×132 Posts So, we don't need build 16 if we're not using the Ryzen 7000?

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