The 'simple' odds of winning the challenge are 1 in 2^63. This assumes a 50/50 chance of winning any particular game.

Once you get to the Final Four with 60 games right, assuming the 50/50 chance per game, you would have a 1 in 8 chance of getting the last three games right.

No way was I entering the contest, it is an invitation to get bugged by Quicken.