hd-utils/lib/utils/number/isPrime.js

A handy utils for modern JS developers

/**
 * @description will check if the passed number is prime or not;
 * @example isPrime(1) // false
 */
export default function isPrime(num) {
    for (let i = 2, s = Math.sqrt(num); i <= s; i++) {
        if (num % i === 0)
            return false;
    }
    return num > 1;
}