Even though Purdue was only the second one seed in tournament history to lose in the first round, the last perfect bracket out of 20 million lost before the outcome of that game. It's difficult enough picking the Sweet Sixteen much correctly picking 67 50/50 outcomes necessary to get a perfect bracket. 

Still have a couple brackets with Houston and Alabama but they are the only two teams left in my final four. 

The Women's tourney had one perfect bracket out of 2.081 million until Mississippi knocked off #1 seed Stanford.