ass="identifier">mpz_int</span> <span class="identifier">myint</span><span class="special">;</span>    <span class="comment">// Arbitrary precision integer type.</span>
</pre>
<p>
      Alternatively, you can compose your own multiprecision type, by combining
      <code class="computeroutput"><span class="identifier">number</span></code> with one of the predefined
      back-end types. For example, suppose you wanted a 300 decimal digit floating-point
      type based on the <a href="http://www.mpfr.org" t