Prime95 version 29.6/29.7/29.8

[Prime95]

Originally Posted by Evil Genius

But if you have time to spare give it a try on a Zen 1. The results may surprise you.

I'm not sure what you are referring to when you say "Zen 1".

All the benchmark results I've seen from Ryzen chips indicate they are excellent performers. Like Intel chips, they are memory bandwidth limited (for large FFT sizes).

[Evil Genius]

Originally Posted by Prime95

I'm not sure what you are referring to when you say "Zen 1".

All the benchmark results I've seen from Ryzen chips indicate they are excellent performers. Like Intel chips, they are memory bandwidth limited (for large FFT sizes).

Zen 1 comprises the AMD Ryzen 1000 series, Zen 1+ the 2000 series, and Zen 2 the 3000 series.

AMD Threadrippers will have double the memory channels however.

[Bulldozer]

Originally Posted by Evil Genius

Zen 1 comprises the AMD Ryzen 1000 series, Zen 1+ the 2000 series, and Zen 2 the 3000 series.

AMD Threadrippers will have double the memory channels however.

Nope. Ryzen 1000 series is Zen, 2000 series is Zen+, and the 3000 series is Zen 2.

[ixfd64]

Very minor issue: on macOS, part of the text box is always cut off.

[pepi37]

Can Prime95 be configured in such way to show what FFT will be used when processing of candidate is started?
To put that info in some log file or something like that

[hansl]

Originally Posted by pepi37

Can Prime95 be configured in such way to show what FFT will be used when processing of candidate is started?
To put that info in some log file or something like that

It does already appear in the main worker window for me, but not specifically in a log from what I can see:

Starting primality test of MXXXXXXXX using FMA3 FFT length 2560K, Pass1=640, Pass2=4K, clm=4, 4 threads

[pepi37]

Originally Posted by hansl

It does already appear in the main worker window for me, but not specifically in a log from what I can see:

Starting primality test of MXXXXXXXX using FMA3 FFT length 2560K, Pass1=640, Pass2=4K, clm=4, 4 threads

I would like to put list of candidates in worktodo.txt so Prime95 scan and write what FFT will be used.

[ssybesma]

Mac OS X: https://mersenne.org/gimps/ftp_root/...8b6.MacOSX.zip


The web folders ftp_root and gimps are transposed and so it won't download.
Takes you to the Home tab on the main website.

[VBCurtis]

Originally Posted by pepi37

I would like to put list of candidates in worktodo.txt so Prime95 scan and write what FFT will be used.

With a little bit of experience, you'll know which FFT is used; it's not like LLR where the FFT choice has multiple inputs (k and n), so you'll learn the approximate cutoffs in fairly short time.

If you post the architecture you run P95 on, I bet some experienced user can share them from (human) memory.

[S485122]

Originally Posted by ssybesma

Mac OS X: https://mersenne.org/gimps/ftp_root/...8b6.MacOSX.zip


The web folders ftp_root and gimps are transposed and so it won't download.
Takes you to the Home tab on the main website.

On the website also there are some links that deserve corrections, it is still version 3 that is posted. Also on the site on the download page all links point to http instead of https.

Jacob

[ssybesma]

Originally Posted by S485122

On the website also there are some links that deserve corrections, it is still version 3 that is posted. Also on the site on the download page all links point to http instead of https.

Jacob

Yep, if I see something I'll let you know.