Check if Number is Prime

/* Write a JavaScript function isPrime(number) that checks if an integer number is prime.
Write JS program primeChecker.js that checks if a few numbers are prime.
The result should be printed on the console (true or false) on the console. */

"use strict";

function isPrime(number) {
    number = Math.abs(number);

    if (number >= 2) {
        var maxDivider = parseInt(Math.sqrt(number));
        for (var i = 2; i <= maxDivider; i += 1) {
            if (!(number % i)) {
                return false;
            }
        }

        return true;
    } else {
        return false;
    }
}

console.log(isPrime(-11));
console.log(isPrime(7));
console.log(isPrime(254));
console.log(isPrime(587));