It's been more than two months since someone won the Powerball jackpot, so the prize has been gradually growing from its $40 million starting point.
The last time Powerball grew nearly so large was February 2014.
Because of strong sales, lottery officials Wednesday raised the estimated jackpot from $485 million to $500 million.
Lottery officials are quick to point out that the game is for fun and a chance to dream. They note the chance of winning a Powerball jackpot is about 1 in 175 million.
Powerball revenue has been down slightly during a drought of jackpots, but officials say this big prize has caused sales to surge.
Copyright 2015 The Associated Press modified.