Project Euler #3

euler3.py

def factorise(n):
    result = []
    check = 2
    while (check * check <= n):
        if n % check == 0:
            result.append(check)
            n /= check
        else:
            check += 1
    if n != 1:
        result.append(n)
    return result

print max(factorise(600851475143))