>
        Class template <code class="computeroutput"><span class="identifier">gmp_int</span></code> fulfils
        all of the requirements for a <a class="link" href="backendconc.html" title="Backend Requirements">Backend</a>
        type. Its members and non-member functions are deliberately not documented:
        these are considered implementation details that are subject to change.
      </p>
<p>
        The type of <code class="computeroutput"><span class="identifier">number_category</span><span cla