title: gmpy source code
body: <p>Is there any way I can look at the source code of <code>gympy</code>?
  To be specific, <code>gmpy2.is_prime</code>.</p>
  
  <p>I tried various links</p>
  
  <ul>
  <li><a href="https://code.google.com/p/gmpy/source/checkout" rel="nofollow">https://code.google.com/p/gmpy/source/checkout</a></li>
  <li><a href="https://code.google.com/p/gmpy/source/browse/#svn%2Ftrunk%2Fsrc" rel="nofollow">https://code.google.com/p/gmpy/source/browse/#svn%2Ftrunk%2Fsrc</a></li>
  <li><a href="https://github.com/qsnake/gmpy" rel="nofollow">https://github.com/qsnake/gmpy</a></li>
  </ul>
  
  <p>I can't find it anywhere.</p>
  
  <p>I have gmpy2 downloaded, and checked on my local drive, but the file extension was <code>.pyd</code>.
  When I open it (in Notepad), the following is the first few lines I see -</p>
  
  <pre><code>MZ       ÿÿ  ¸       @                                   ð   º ´  Í!¸LÍ!This program     cannot be run in DOS mode.
  </code></pre>
  
  <p>The rest is gibberish.</p>
  
  <p>I want to write a very fast prime-checker, and its the best I've come across so far
  Can anyone tell me how I can get at the source code? Or perhaps links to some other fast prime-checker's source code (or discussions)?</p>