def test_simple_factorization():
"""Tests simple factorization method """
assert simple_factorization(20) == [2, 2, 5]
assert simple_factorization(201929) == [7, 7, 13, 317]
assert simple_factorization(0) == []
assert simple_factorization(1) == []
assert simple_factorization(12) == [2, 2, 3]
assert simple_factorization(17) == [17]
def problem_3():
""" Attempt to solve the problem... """
factors = simple_factorization(600851475143)
return max(factors)