Discussion related to cado-nfs

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

       Dear Meng,

> Date: Wed, 23 Mar 2016 21:00:07 +0800 (CST)
> From: meng  <qsmeng@126.com>
> 
> Hello everyone,
>    Based on the Cado-nfs-2.2 and with some modification to it,  I can find 
> a litter better polynomial for RSA120 (Murphy E=9.43e-10) with admax=2e4. 
> However, when I set admax=4e5, I only can get the  polynomial with Murphy 
> E=8.55e-10 as Cado-nfs-2.2 does.
>   Maybe this can be solved by some configuration, like the number of 
> reserved size-optimized  polynomials  and something alike. Would you please 
> tell me how to configure this parameter?
>   Thank you very much.
>  Best regards,
> Qingshu Meng

you can play with tasks.polyselect.nrkeep (default is 100 for a c120) and
tasks.polyselect.ropteffort (default is 5): nrkeep is the number of 
polynomials
kept after stage 1, and ropteffort is the effort made in stage 2 (rootsieve).

If you find better parameters, please tell us!

Paul