#!/usr/bin/env python
"""
Created on 18 Mar 2017

@author: David Doblas Jiménez
@email: daviddoji@pm.me

Solution for problem 3 of Project Euler
https://projecteuler.net/problem=3
"""

from utils import timeit


@timeit("Problem 3")
def compute():
    """
    The prime factors of 13195 are 5, 7, 13 and 29.

    What is the largest prime factor of the number 600851475143?
    """

    ans = 600851475143
    factor = 2
    while factor * factor < ans:
        while ans % factor == 0:
            ans = ans // factor
        factor += 1

    return ans


if __name__ == "__main__":
    print(f"Result for problem 3 is {compute()}")