public void GCDLong()
    {
        var expected = 4;
        var actual   = Factorization.GCD(412L, 612L);

        Assert.Equal(expected, actual);
    }
    public void GCDInt()
    {
        var expected = 4;
        var actual   = Factorization.GCD(412, 612);

        Assert.Equal(expected, actual);
    }