buf = buf[1:]
		}
	}

	return new(big.Int).SetBits(words)
}

func TestDecimalConstants(t *testing.T) {
	sqrtM1String := "19681161376707505956807079304988542015446066515923890162744021073123829784752"
	if exp := new(Element).fromDecimal(sqrtM1String); sqrtM1.Equal(exp) != 1 {
		t.Errorf("sqrtM1 is %v, expected %v", sqrtM1, exp)
	}