Subject: Discussion related to cado-nfs
List archive
- From: Markus Tervooren <mail@markustervooren.de>
- To: Paul Zimmermann <Paul.Zimmermann@inria.fr>
- Cc: cado-nfs@inria.fr
- Subject: Re: [cado-nfs] Issue with "purge" on C210 GNFS
- Date: Thu, 3 Oct 2024 21:31:24 +0200
- Authentication-results: mail3-smtp-sop.national.inria.fr; spf=None smtp.pra=mail@markustervooren.de; spf=Pass smtp.mailfrom=mail@markustervooren.de; spf=Pass smtp.helo=postmaster@sxb1plsmtpa01-01.prod.sxb1.secureserver.net
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- Ironport-sdr: 66fef114_N2bsasikb2wv9YQmBkA7YIvTuZ409jZ4F0i+IpiihYQTYZ1 vvPYJpLRV0058ZuqIfylggXPsuFN26BVHYw7GGA==
Dear Paul,
I successfully obtained a suitable matrix and have now begun the BWC step.
Sieving parameters were:
-q0 1000000 -q1 920000000 -A 31 -lim0 300000000 -lim1 300000000 -lpb0 35 -lpb1 35 -mfb0 86 -mfb1 96 -ncurves0 20 -ncurves1 20
For a total of 3B raw relations. After dup2, 1.9B relations remained. Including all relations up to 35 bits resulted in a significantly better matrix compared to using only 34 bits - these were removed after sieving.
The purge process reduced the total to 249 million relations:
Step 0: only singleton removal
Sing. rem.: begin with: nrows=1917941307 ncols=1948512258 excess=-30570951 at 2883.09
Sing. rem.: iter 001: nrows=1155353090 ncols=1012751300 excess=142601790 at 4037.84
Sing. rem.: iter 002: nrows=976499437 ncols=821895684 excess=154603753 at 4521.78
Sing. rem.: iter 003: nrows=929047533 ncols=773453347 excess=155594186 at 4857.31
...
Sing. rem.: iter 002: nrows=249083636 ncols=249083416 excess=220 at 56595.46
Sing. rem.: iter 003: No more singletons, finished at 56675.36
Matrix: total 71851914 rows 71851662 cols 10096684980 coeffs
krylov: N=60000 ; ETA (N=2248000): Wed Oct 30 03:07:17 2024 [1.100 s/iter]
Expecting factors in about 45 days. The composite is part of aliquot sequence 162126, index 4412.
Suggestions for better parameters are always welcome.
Markus
Am 24.09.24 um 10:14 schrieb Paul Zimmermann:
Dear Markus,
turns out I forgot to include the free relations into nrels. After doing sogreat to hear! Please tell us if you manage to complete your factorization.
there is no error anymore.
Paul
Attachment:
OpenPGP_signature.asc
Description: OpenPGP digital signature
- Re: [cado-nfs] Issue with "purge" on C210 GNFS, Markus Tervooren, 10/03/2024
- Re: [cado-nfs] Issue with "purge" on C210 GNFS, Paul Zimmermann, 10/04/2024
- Re: [cado-nfs] Issue with "purge" on C210 GNFS, Markus Tervooren, 10/04/2024
- Re: [cado-nfs] Issue with "purge" on C210 GNFS, Paul Zimmermann, 10/04/2024
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