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[cado-nfs] sqrt error


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  • From: eric.jeancolas@free.fr
  • To: cado-nfs@inria.fr
  • Subject: [cado-nfs] sqrt error
  • Date: Mon, 26 Apr 2021 07:24:08 +0200 (CEST)
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Hello

I got the following error in the last step of a process:
Error:Square Root: Error, N does not divide resultant of given polynomials,
or there are multiplicities.
Error:Square Root: Can not compute m.
I'm in a snfs mode.
The polynomial is as follows:
n:
181570647363941951922859674104963771103015312977807439204421953197794821673476296854978179746096739603508598016332617111965534228905323443567644055007324027034168949
skew: 1.36
type: snfs
c0: -80
c5: 17
Y0: 100000000000000000000000000000000
Y1: -1

Which parameter can I tune to prevent this error?
If such a parameter is easy to tune, could you add a line on the Error
message to give such an advice? With something like:
Error:Square Root: This is due to blah blah, try a larger tasks.blah.blah
parameter...

Best regards.
Éric



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