Problem 1

Largest prime factor

The prime factors of 13195 are 5, 7, 13 and 29.

What is the largest prime factor of the number 600851475143 ?

for nextPrime view Prime Numbers

var num = 600851475143;

var prime = 2;
var devided = false;

var list = [];
has = false;
var leftNum = num;

while( leftNum > 1) {
    while( leftNum % prime !== 0 ) {
        prime = nextPrime(prime);
    }

    leftNum = leftNum / prime;
    list.push(prime);
}
console.log(list);