# Where f(n) = n! belongs to? P, co-P, NPComplete or NPHard? [duplicate]

Where f(n) = n! belongs to? P, co-P, NPComplete or NPHard?

## marked as duplicate by Raphael♦Mar 31 at 14:26

• do you define $f(n)$ as a complexity function? what exactly are you asking? – lox Mar 31 at 14:07