polisirreducible and factor

[Jean-Marc Sac-Epée <jmse@poncelet.univ-metz.fr>]

Hi,

I have strange problems with "polisirreducible" and "factor" functions, which fail with some peculiar polynomial.

Let me give the following sample:

? p=x^44 + x^42 - x^31 - x^29 - x^26 - x^24 - x^23 - x^21 - x^20 -
 x^18 - x^15 - x^13 + x^2 + 1
%1 = x^44 + x^42 - x^31 - x^29 - x^26 - x^24 - x^23 - x^21 - x^20- x^18 - x^15 - x^13 + x^2 + 1
? factor(p)
  ***   bug in GP (Segmentation Fault), please report
? polisirreducible(p)
 ***   bug in GP (Segmentation Fault), please report

I think that  polisirreducible and factor functions have problems with polynomials which are divisible by cyclotomic polynomials. Is it possible?

Best regards,

JM

-- 
Jean-Marc Sac-Epée, Ingénieur de Recherches,    ("\-''-/").___..--''"`-.
Laboratoire de Mathématiques, Université de Metz,(`@_ @  )   `-.  (     ).`-.__.`)
Tél 03 87 54 72 69                                (_Y_.)'  ._   )  `._ `. `-..-''
Fax 03 87 31 52 73                                 `--'_..-_/  /--'_.' ,'
mail jmse@poncelet.univ-metz.fr