AUSTIN (KXAN) — It's March, and you know what that means — time for some madness! This year, more than 3.4 million women's NCAA Tournament brackets were made on ESPN alone. But how many perfect brackets remain? Just one — at least on EPSN's site. Almost a fifth of all ESPN brackets were busted in the first game, when Michigan defeated Iowa State. Indiana's win over Utah knocked out more than 1.2 million brackets. Later, 633,000 brackets were busted when Oregon beat Vanderbilt. How many perfect brackets remain in the NCAA men's tournament? After 13 games, the number of perfect brackets dropped below 100,000, thanks to Richmond's win over Georgia Tech. By the end of the tournament's first day, just 58,424 brackets remained intact — accounting for 1.71% of all brackets. South Dakota State's win over Oklahoma State later wiped out 74% of the remaining brackets on ESPN, dropping the total below 12,000. At the end of the first round of the tournament, 1,811 brackets were still intact, 0.05% of all brackets. Kansas State's win over Kentucky later dropped the total below 1,000. Just 106 remained at the end of the tournament’s third day. By the end of the second round, 25 perfect brackets remained. TCU's win over Notre Dame dropped the number of brackets remaining from seven to one. It also left CBS Sports Bracket Games with no perfect brackets remaining. The owner of the last bracket left standing, highlighted by the NCAA, may be on the edge of their seat Sunday. Of the two games being played — South Carolina versus Duke and UCLA versus LSU — LisaVT22's Picks 1 on ESPN has selected South Carolina and LSU. With 63 games in total, what is the longest stretch of correctly predicted games in the women's tournament? According to the NCAA, a bracket last year correctly predicted the outcomes of the first 50 games. Meanwhile, perfection ended on the men's side last weekend. It is, of course, possible that you have a perfect bracket on paper or another site. If that's the case, congratulations! The Associated Press and Nexstar's Addy Bink contributed to this report. ...read more read less