Function primal_check::as_prime_power

pub fn as_prime_power(x: u64) -> Option<(u64, u8)>

Return Some((p, k)) if x = p^k for some prime p and k >= 1 (that is, including when x is itself a prime).

Returns None if x not a perfect power.

Examples

assert_eq!(primal::as_prime_power(2), Some((2, 1)));
assert_eq!(primal::as_prime_power(4), Some((2, 2)));
assert_eq!(primal::as_prime_power(8), Some((2, 3)));
assert_eq!(primal::as_prime_power(1024), Some((2, 10)));

assert_eq!(primal::as_prime_power(1000), None);

assert_eq!(primal::as_prime_power(15), None);