title: what are the values in _ga cookie?
body: <p>I am using <a href="https://support.google.com/analytics/answer/2790010?hl=en&amp;ref_topic=2790009">universal analytics</a>. universal analytics creates first party cookie <code>_ga</code></p>
  
  <pre><code> _ga=1.2.286403989.1366364567;
  </code></pre>
  
  <p>286403989 is clientId</p>
  
  <p>1366364567 is timestamp</p>
  
  <p>what is <code>1</code> and <code>2</code> in _ga cookie?</p>