Still the 1. One perfect women's March Madness bracket going into Sweet 16

Key Points:

• Going into the Sweet 16 of the women's NCAA Tournament, only one perfect bracket remained among millions of entries in ESPN's bracket challenge and the NCAA's official website contests, while no perfect brackets were left on the men's side.
• The NCAA's site started Monday with 235 perfect women's brackets, which dropped to seven after Virginia's upset over Iowa, and then to one following Notre Dame's win against Ohio State.
• The men's perfect bracket quest ended Sunday after Tennessee's victory over Virginia, preceding Iowa's upset of top-seeded Florida; ESPN and NCAA contests had no perfect brackets remaining.
• ESPN's bracket challenge had 26.5 million entries, with 36 million tracked by the NCAA across multiple contests, showcasing the extreme difficulty of maintaining a perfect bracket through multiple tournament rounds.
• The statistical odds of predicting a perfect 63-0 bracket range from one in 9.2 quintillion for random guesses to one in 120 billion for semi-educated picks, highlighting the near impossibility of perfection.