prime number checking algorithm
function isPrime(num) {
if (num <= 3) return num > 1;
if ((num % 2 === 0) || (num % 3 === 0)) return false;
let count = 5;
while (Math.pow(count, 2) <= num) {
if (num % count === 0 || num % (count + 2) === 0) return false;
count += 6;
}
return true;
}prime number checking algorithm
def is_prime(n: int) -> bool:
"""Primality test using 6k+-1 optimization."""
if n <= 3:
return n > 1
if n % 2 == 0 or n % 3 == 0:
return False
i = 5
while i ** 2 <= n:
if n % i == 0 or n % (i + 2) == 0:
return False
i += 6
return TrueCopyright © 2021 Codeinu
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