A single Powerball ticket sold in Michigan matched all six numbers in Wednesday night's drawing, winning a $337 million jackpot.
A late sales rush pushed the top prize from the earlier advertised $320 million.
The numbers drawn Wednesday night were 6, 27, 46, 51 and 56, and the Power Ball was 21.
With Wednesday night's win, the jackpot for Saturday's Powerball drawing was reset to $40 million.
The jackpot in Friday's Mega Millions multi-state lottery is $46 million.
