Subject: Discussion related to cado-nfs
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- From: hermann@stamm-wilbrandt.de
- To: cado-nfs@inria.fr
- Subject: [cado-nfs] .params files
- Date: Thu, 09 Nov 2023 11:56:20 +0100
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This is a followup on "[cado-nfs] Parameter documentation" thread,
with last posting 7/6/2023:
https://sympa.inria.fr/sympa/arc/cado-nfs/2023-07/msg00002.html
This was just before I joined the mailing list, so I don't have email to reply to.
Also it is more on the selection process used to determine default .params files. From last email pointed to:
...Recently I am active on mersenneforum.org, mostly wrt gwnum lib software
> Well, about params.c130, it seems have a continuity check. Shouldn't be set
> to 13 ?
these parameters were set using some optimization tool.
This tool does not guarantee continuity of the parameters.
...
like Jean Penné's LLR and paulunderwood's gw_utilitiy, eg. for determining
sum of 2 squares for largest known 11.9digit prime =1 (mod 4) in 6.7 days:
https://github.com/Hermann-SW/11887192-digit-prime
There is an active cado-nfs subforum:
mersenneforum.org > Factoring Projects > CADO-NFS
https://www.mersenneforum.org/forumdisplay.php?f=170
Recently I posted really cool RSA-150 factoring time on my new 16c/32T
AMD 7950X CPU of only 26:41:57h. @VBCurtis seems to be very active in
tuning cado-nfs .params files, and provided c150.params in this posting:
https://www.mersenneforum.org/showthread.php?t=27315&page=4&p=642545
He stated that it factored RSA-7950X on his AMD 5950X in 16:08h.
My 7950X did factor RSA-150 in only 13:31h(!).
The runtime quotioent roughly matches both CPUs Passmark multithreaded CPUmark values:
https://github.com/Hermann-SW/RSA_numbers_factored/tree/main/cado-nfs#factoring-rsa-x
paulunderwood and others use the tuned c150.params file for other big RSA-numbers in that range, not only the original RSA-150 I used. In that
and other threads it is also described how modifications of the params
files are tested and tuned.
I only wanted to point to c150.params here, because of the runtime reduction
to 50.66% compared to cado-nfs default c150.parans on 7950X(and 5950X) CPU.
Regards,
Hermann.
- [cado-nfs] .params files, hermann, 11/09/2023
- Re: [cado-nfs] .params files, Paul Zimmermann, 11/09/2023
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