47962...64631 (215-digits)

This number is a prime.

                                                                       47962
8163985231 1760618972 6043968411 8485193047 0859805935 0620557763 2776947377
5582015858 0941773369 7401129837 8126518329 9561695077 8101444942 9029290650
6606685128 2169153821 0715860490 0927276535 0581497706 5288925235 2435564631

The smallest difference of powers greater than a googol. Note that is the first prime of the form n^n-(n-1)^(n-1), where both numbers n and (n-1) are composite. [Loungrides]