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<a name="boost_multiprecision.tut.ints"></a><a class="link" href="ints.html" title="Integer Types">Integer Types</a>
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<p>
        The following back-ends provide integer arithmetic:
      </p>
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                <p>
                  Backend Type
                </p>
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<th>
                <p>
                  Header
                </p>
              </th>
<th>
                <p>
                  Radix
                </p>
              </th>
<th>
                <p>
                  Dependencies
                </p>
              </th>
<th>
                <p>
                  Pros
                </p>
              </th>
<th>
                <p>
                  Cons
                </p>
              </th>
</tr></thead>
<tbody>
<tr>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">cpp_int</span></code>
                </p>
              </td>
<td>
                <p>
                  boost/multiprecision/cpp_int.hpp
                </p>
              </td>
<td>
                <p>
                  2
                </p>
              </td>
<td>
                <p>
                  None
                </p>
              </td>
<td>
                <p>
                  Very versatile, Boost licensed, all C++ integer type which support
                  both <a href="http://en.wikipedia.org/wiki/Arbitrary-precision_arithmetic" target="_top">arbitrary
                  precision</a> and fixed precision integer types.
                </p>
              </td>
<td>
                <p>
                  Slower than <a href="http://gmplib.org" target="_top">GMP</a>, though
                  typically not as slow as <a href="http://libtom.net" target="_top">libtommath</a>
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">gmp_int</span></code>
                </p>
              </td>
<td>
                <p>
                  boost/multiprecision/gmp.hpp
                </p>
              </td>
<td>
                <p>
                  2
                </p>
              </td>
<td>
                <p>
                  <a href="http://gmplib.org" target="_top">GMP</a>
                </p>
              </td>
<td>
                <p>
                  Very fast and efficient back-end.
                </p>
              </td>
<td>
                <p>
                  Dependency on GNU licensed <a href="http://gmplib.org" target="_top">GMP</a>
                  library.
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">tom_int</span></code>
                </p>
              </td>
<td>
                <p>
                  boost/multiprecision/tommath.hpp
                </p>
              </td>
<td>
                <p>
                  2
                </p>
              </td>
<td>
                <p>
                  <a href="http://libtom.net" target="_top">libtommath</a>
                </p>
              </td>
<td>
                <p>
                  Public domain back-end with no licence restrictions.
                </p>
              </td>
<td>
                <p>
                  Slower than <a href="http://gmplib.org" target="_top">GMP</a>.
                </p>
              </td>
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