Discussion related to cado-nfs

[meng <qsmeng@126.com>]

Dear Paul,

 >At 2015-04-24 21:32:39, "paul zimmermann" <Paul.Zimmermann@inria.fr> wrote:

> Dear Meng,>>> Date: Fri, 24 Apr 2015 21:20:16 +0800 (CST) >> From: meng <qsmeng@126.com>>> >> Hi, >> I try to use the polynomial that is only size-optimized to do factoring, the following error is displayed: >> ...... >> Info:Polynomial Selection (root optimized): Imported polynomial, skipping this phase >> Info:Generate Factor Base: Starting >> Warning:Command: Process with PID 7095 finished with return code -6 >> Error:Generate Factor Base: Program run on server failed with exit code -6 >> Error:Generate Factor Base: Command line was: build/greatnet/sieve/makefb -poly /tmp/c150/c150.polyselect2.poly -alim 32000000 -maxbits 12 -out /tmp/c150/c150.factorbase.roots.gz -t 2 > /tmp/c150/c150.factorbase.makefb.stdout.1 2> /tmp/c150/c150.factorbase.makefb.stderr.1 >> Error:Generate Factor Base: Stderr output follows (stored in file /tmp/c150/c150.factorbase.makefb.stderr.1): >> b'Error, N does not divide resultant of given polynomials\ncode BUG() : condition 0 failed in cado_poly_getm at /$home/cado-nfs/utils/cado_poly.c:201 -- Abort\n' >> >> Traceback (most recent call last):>> ...... >> What should I do to fix it if I would like to use only size-optimized polynomial? >> Thank you in advance. >> Best regards,>> Meng> >this is strange. Please can you send us your c50.poly file, your >cadofactor.py command-line, and the exact revision you used?>

>Paul

From what you said, the size_optimized polynomial generated by cado-nfs is used to do the factoring and there is no error now. The polynomial that caused the above error is generated by my modified cado-nfs.  So it is my fault, not cado-nfs's fault.

Thank you for your time.

Have a good weekend.

Meng