{"-0x8000000000000000000", 75},
}

func TestTrailingZeroBits(t *testing.T) {
	for i, test := range tzbTests {
		in, _ := new(Int).SetString(test.in, 0)
		want := test.out
		got := in.TrailingZeroBits()

		if got != want {
			t.Errorf("#%d: got %v want %v", i, got, want)
		}
	}
}

func BenchmarkBitset(b *testing.B) {
	z := new(Int)
	z.SetBit(z, 512, 1)
	b.ResetTimer()