Problem using factorff()

[Bodo Schulze <bobesch@letras.net>]

Hi all,

I'm pretty new to Pari, but re-reading the manual and searching the mail
archive didn't give me any clue of how to correctly use factorff().

Here's what I tried:

### Initialize the field
? f=ffinit(2,3)
%9 = Mod(1, 2)*x^3 + Mod(1, 2)*x + Mod(1, 2)
### Take a simple polynomial
? a=x^2
%10 = x^2
### Try to factor it
? factorff(a,2,f)
  ***   polynomial variable must be of higher priority than finite field
variable in factorff.

After reading the manual once more, I understood I have to define the
polynomial before defining the finit field. So I reversed the order.

### Take a simple polynomial
? b=x^2
%11 = x^2
### Initalize the field
? e=ffinit(2,3)
%12 = Mod(1, 2)*x^3 + Mod(1, 2)*x + Mod(1, 2)
### Try to factor the polynomial
? factorff(b,2,e)
  ***   polynomial variable must be of higher priority than finite field
variable in factorff.

Any comments welcome.

Best regards, 

Bodo Schulze