title: What's the best column type for Google+ User ID?
body: <p>Google+ has very long User IDs</p>
  
  <p>104560124403688998123</p>
  
  <p>(21 characters), which is not possible to input into BIGINT field (not unsigned)</p>
  
  <p>What column type would you use for such IDs ?</p>
  
  <p>I do not think that varchar is good idea</p>