]]></prerequisite_results>
				<testwords><![CDATA[

              ]]></testwords>
			</collection>
			<collection Name="n2sm">
				<bad_urls><![CDATA[
contains:\\.xml$
              ]]></bad_urls>
				<good_urls><![CDATA[
https://www.n2sm.net/
              ]]></good_urls>
				<prerequisite_results><![CDATA[
20
              ]]></prerequisite_results>
				<testwords><![CDATA[

              ]]></testwords>

          ArithmeticException.class,
          () -> {
            UnsignedInteger unused = UnsignedInteger.fromIntBits(a).dividedBy(UnsignedInteger.ZERO);
          });
    }
  }

  public void testMod() {
    for (int a : TEST_INTS) {
      for (int b : TEST_INTS) {
        if (b != 0) {
          UnsignedInteger aUnsigned = UnsignedInteger.fromIntBits(a);