The winning ticket from Saturday's drawing correctly matched all five white balls, 08-14-15-16-27. It missed the red Powerball 26.
An added "Power Play" set the prize at $2 million, minus 25 percent in federal taxes.
Nobody won the estimated jackpot of $40 million.
Pennsylvania lottery officials say the ticket was sold at Long Newsstand in south Philadelphia. The retailer will get a $10,000 bonus.
The Powerball jackpot has now grown to an estimated annuity value of $50 million, or $33.3 million in cash. The next drawing is Wednesday.