Nothing is testing the base division now :D add a case

        self::assertEquals(0, mod_int($a, $b));

    }

    public function testDivModBigButBFits()

    {

        if (PHP_INT_SIZE < 8) {

            $this->markTestSkipped();

        }

        $a = from_hex('73276fe21bfc5b874f0000', 16);

        $b = 10000000000000000;

        list($d, $m) = div_mod_int($a, $b);

        self::assertEquals('13921270543', to_dec($d));

        self::assertEquals(0, $m);

        // also check simple mod

        self::assertEquals(0, mod_int($a, $b));

    }

    public function testModNoZero()

    {

        $this->expectException(\RangeException::class);