C Bignum Bakeoff

<i>The object of the BIGNUM BAKEOFF is to write a C program of 512 characters or less (excluding whitespace) that returns as large a number as possible from main(), assuming C to have integral types that can hold arbitrarily large integers.</i><p>Rules for the contest:<p>1. <a href="http:&#x2F;&#x2F;djm.cc&#x2F;bignum-rules-posted.txt" rel="nofollow">http:&#x2F;&#x2F;djm.cc&#x2F;bignum-rules-posted.txt</a><p>2. <a href="http:&#x2F;&#x2F;djm.cc&#x2F;bignum-clarification-i.txt" rel="nofollow">http:&#x2F;&#x2F;djm.cc&#x2F;bignum-clarification-i.txt</a><p>3. <a href="http:&#x2F;&#x2F;djm.cc&#x2F;bignum-clarification-ii.txt" rel="nofollow">http:&#x2F;&#x2F;djm.cc&#x2F;bignum-clarification-ii.txt</a>