On Tuesday, March 27, 2018 at 10:48:34 AM UTC-7, Ralf Stephan wrote:
>
> Nils,
>
> See https://trac.sagemath.org/ticket/21067
>
> for a rational factor_list().
>
I don't think that helps casual user's API at all. If I have to write
SR(12/4).factor_list(), I'd rather write ZZ(12/4).factor(). In fact, in
sage we already have:
sage: factor(12/21)
2^2 * 7^-1
so no complaints there.
I think we can just put some novice-friendly logic in is_prime rather than
have the current implementation:
try:
return n.is_prime()
except (AttributeError, NotImplementedError):
return ZZ(n).is_prime()
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