want := i / c
			got := (i * (max + m)) >> (n + uint(s))
			if want != got {
				t.Errorf("unsigned magic wrong for %d / %d: got %d, want %d (m=%d,s=%d)\n", i, c, got, want, m, s)
			}
		}
	}
}

func TestMagicUnsigned(t *testing.T) {
	One := new(big.Int).SetUint64(1)
	for _, n := range [...]uint{8, 16, 32, 64} {
		TwoN := new(big.Int).Lsh(One, n)
		Max := new(big.Int).Sub(TwoN, One)
		for _, c := range [...]uint64{
			3,
			5,