title: Clojure: ClassCastException java.lang.Long cannot be cast to clojure.lang.IFn
body: <p>I've started learning clojure and I managed to get a few of the problems on Project Euler worked out but for whatever reason I've had a tough time with <a href="http://projecteuler.net/problem=4" rel="nofollow">this</a> one. </p>
  
  <p><a href="https://gist.github.com/1756608" rel="nofollow">Here</a> is the code I have written for it. It looks to run fine until it gets to the second outer loop. Then it fails and the error message looks like <a href="http://imgur.com/GVC9I" rel="nofollow">this</a>. I did some googling for this error and it seems to be about having extra parens but I'm not seeing where they are in my code. Alas I've probably just overlooked something simple.</p>
  
  <p>Also if there are any bad coding conventions in there please let me know.</p>