Bill Allombert on Fri, 30 Jul 2004 15:04:35 +0200


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unwarranted factor warning ? 

Package: pari
Version: 2.2.8 CVS as of today
Severity: minor

Hello PARI-dev,

While testing galoisinit() I found out that:

? \g2
? factor(14428102754787546312318245110276^2,0);
  *** factor: Warning: IFAC: unfactored composite declared prime.
        1096507

However 1096507 is a prime number. Please note that
? factor(14428102754787546312318245110276,0);

does not output any warning, so the above behaviour seems unwarranted.

There is also the more general question of the wording of the warning:
it is displayed when a partial factorisation is requested, and the
composite is not 'declared' prime in any way outside being output as
part of the factorisation.

Cheers,
Bill.