title: Ruby get maximum integer size value
body: <p>What is the Ruby equivalent for Java's <code>Integer.MAX_VALUE?</code>. Hopefully native.</p>
  
  <p>Runner Up: If no equivalent, I need to set this for a Time object, so instead of hardcoding the maximum date for an integer 2116-02-20, is there a system constant that would work for this?</p>