prime number checking algorithm
bool IsPrime(int n) { if (n == 2 || n == 3) return true; if (n <= 1 || n % 2 == 0 || n % 3 == 0) return false; for (int i = 5; i * i <= n; i += 6) { if (n % i == 0 || n % (i + 2) == 0) return false; } return true; }
prime number checking algorithm
bool IsPrime(int n) { if (n == 2 || n == 3) return true; if (n <= 1 || n % 2 == 0 || n % 3 == 0) return false; for (int i = 5; i * i <= n; i += 6) { if (n % i == 0 || n % (i + 2) == 0) return false; } return true; }
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 True
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