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Message 9138 - Posted: 10 Oct 2023, 12:41:33 UTC

by the new prst app. There are some issues with similar CPUs and Riesel Bases (-1), Sierpinski Base is fine:

GenuineIntel Intel(R) Celeron(R) J4125 CPU @ 2.00GHz [Family 6 Model 122 Stepping 8]
GenuineIntel Intel(R) Celeron(R) CPU N3150 @ 1.60GHz [Family 6 Model 76 Stepping 3]
GenuineIntel Intel(R) Pentium(R) Silver J5005 CPU @ 1.50GHz [Family 6 Model 122 Stepping 1]

1 (0x1) Unknown error number


The gwnum must have a bug, already reported to the dev.

If you have such errors with these CPUs, disable work for -1 bases until this is fixed.

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Message 9161 - Posted: 15 Oct 2023, 19:35:57 UTC
Last modified: 15 Oct 2023, 19:40:38 UTC

I am glad it is just GWNUM (or the Intel CPU design itself?) that is at error here, it happened just when I added some extra libraries for multiple and arbitrary precision on my J5005....

BTW: The new Sierpinski Base app runs like a dream on one of my Ryzen 7 5700G machines, kudos.

P.S.: Get well soon!

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Message 9163 - Posted: 15 Oct 2023, 21:23:39 UTC - in response to Message 9161.

I am glad it is just GWNUM (or the Intel CPU design itself?) that is at error here, it happened just when I added some extra libraries for multiple and arbitrary precision on my J5005....

BTW: The new Sierpinski Base app runs like a dream on one of my Ryzen 7 5700G machines, kudos.

P.S.: Get well soon!


must be something in gwnum lib, +1 bases are fine, something with FFT length I think.

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Message 9185 - Posted: 23 Oct 2023, 10:12:12 UTC - in response to Message 9138.

by the new prst app. There are some issues with similar CPUs and Riesel Bases (-1), Sierpinski Base is fine:

GenuineIntel Intel(R) Celeron(R) J4125 CPU @ 2.00GHz [Family 6 Model 122 Stepping 8]
GenuineIntel Intel(R) Celeron(R) CPU N3150 @ 1.60GHz [Family 6 Model 76 Stepping 3]
GenuineIntel Intel(R) Pentium(R) Silver J5005 CPU @ 1.50GHz [Family 6 Model 122 Stepping 1]
1 (0x1) Unknown error number


The gwnum must have a bug, already reported to the dev.

If you have such errors with these CPUs, disable work for -1 bases until this is fixed.


Just a hunch: You do know that these CPU's have a thing in common? No L3 cache. If your code for -1 bases explicitely makes use of L3 cache than they will fail.

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Message 9186 - Posted: 23 Oct 2023, 10:20:08 UTC - in response to Message 9185.

by the new prst app. There are some issues with similar CPUs and Riesel Bases (-1), Sierpinski Base is fine:

GenuineIntel Intel(R) Celeron(R) J4125 CPU @ 2.00GHz [Family 6 Model 122 Stepping 8]
GenuineIntel Intel(R) Celeron(R) CPU N3150 @ 1.60GHz [Family 6 Model 76 Stepping 3]
GenuineIntel Intel(R) Pentium(R) Silver J5005 CPU @ 1.50GHz [Family 6 Model 122 Stepping 1]
1 (0x1) Unknown error number


The gwnum must have a bug, already reported to the dev.

If you have such errors with these CPUs, disable work for -1 bases until this is fixed.


Just a hunch: You do know that these CPU's have a thing in common? No L3 cache. If your code for -1 bases explicitely makes use of L3 cache than they will fail.


Should work, +1 did, if Iam getting a chance to compile the latest prst source with gwnum 30.18 to test then I will know more, no feedback from the dev yet.

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Message 9197 - Posted: 27 Oct 2023, 18:38:45 UTC
Last modified: 8 Nov 2023, 18:16:18 UTC

https://srbase.my-firewall.org/sr5/download/PRST-11-test.zip

This is a recompiled unchanged srbase version with latest code changes and gwnum30.19 for testing for the problem CPUs listed in this thread.

Run locally outside BOINC with

prst.exe -boinc -fermat "13288*96^204730-1"


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