Discussion related to cado-nfs

[Zimmermann Paul <Paul.Zimmermann@inria.fr>]

       Paul,

> > any news of your first factorization with CADO-NFS?
> 
> Yes.  Success, at last.
> 
> Info:Calling Block-Wiedemann...
> Info:Adding characters...
>     Info:25 vectors remaining after characters.
> Info:--------------------------------------------------------------------------
> Info:Square root
> Info:--------------------------------------------------------------------------
> Info:Preparing 25 dependency files
> Info:Testing dependency number 0...
>     Info:Factorization was successful!
> 
> Info:938162157466439248706242446740994666550032835844927071820158466530202226253
>  [prime]
> 
> Info:167833726244347054883741985866275357519984119769032664266435089934119867
>  [prime]
>     Info:Doing gcds with previously known composite factors
>     Info:non-trivial factor:
> 938162157466439248706242446740994666550032835844927071820158466530202226253 
> [prime]
>     Info:non-trivial factor:
> 167833726244347054883741985866275357519984119769032664266435089934119867
> [prime]
>     Info:Now: 2 prime factors, 0 composite factors
>     Info:Factorization complete
> Info:--------------------------------------------------------------------------
> Info:All done!
> Info:--------------------------------------------------------------------------
> 167833726244347054883741985866275357519984119769032664266435089934119867
> 938162157466439248706242446740994666550032835844927071820158466530202226253

congratulations!

> Nice to see it was not an ECM miss.
> 
> This number was the last remaining sub-C150 composite from the
> generalized Cullen & Woodall tables at
> http://www.leyland.vispa.com/numth/factorization/cullen_woodall/cw.html
> and was the cofactor of GC(8,233) aka 233*8^233+1.
> 
> With one exception, all the problems I had with the CADO-NFS
> factorization arose from my incompetence.  I expected to hit various
> issues with a new (to me) and complex piece of software because I've had
> similar experiences in the past with the CWI suite and with
> msieve/ggnfs.  CADO-NFS was certainly *much* easier to build than ggnfs!

thank you for your feedback.

> The one exception is that cadofactor.pl doesn't handle relative paths
> properly.  Most of the time they work fine but the linear algebra fails.
> Someone with ability to create a bug report in the tracker should do so.
> I don't have the requisite permissions.
> 
> Thanks all.
> 
> Paul L.

it is very easy to create an account on gforge.inria.fr, moreover it will be
needed if you want to contribute...

Best regards,
Paul Z.