factor
Assuming "factor" refers to a computation | Use as or or or or instead

Computational Inputs:

» expression to factor:

Input interpretation

factor | -1 + x^4

Result

(x - 1) (x + 1) (x^2 + 1)

Factorization over the complexes

(x - 1) (x - i) (x + i) (x + 1)