If you bought a lottery ticket, even if you didn't win the jackpot , you better check it. Winning tickets often go unclaimed.
See what the winning Powerball jackpot numbers were here .
There were nearly $40 billion in prizes awarded in U.S. lotteries last year, and about $800 million of that wasn't collected.
In Wednesday night's drawing, there were about 70 people who scored a $1 million prize.
Lotto officials say one or two of them will never know they are winners.
The jackpot is back down to $40 million.