This photo provided by Fadi Alberre shows the Marietta Liquors & Deli in Menifee, Calif..
Saturday's jackpot is the seventh-largest in Powerball's history, according to the California lottery.
The unnamed victor has a year to claim the jackpot.
The jackpot winning ticket was sold in Sun City, southeast of Los Angeles, California Lottery said.
The store is just off a highway in an area originally developed as a retirement community.
California Lottery officials said the retailer where the winning ticket was sold will receive a $1 million "retailer bonus".
Alberre owns the store with his father, who has owned it for 26 years.
"We're so blessed for this to happen", Alberre told The Associated Press.
"We're hoping they're a parishioner and they'll bring us a check tomorrow", said Blais, president of the Sun City Civic Association's board.
"There's a lot of good folks over there, so hopefully one of our Menifee folks won", said Neil Winter, the mayor of the city.
Those numbers were 20, 26, 32, 38, 58 and the Powerball number 3.
The victor must come forward within a year of the drawing to receive either an annuity, which pays off over 29 years, or to take home the cash prize of $279.1 million. The unnamed couple that bought the ticket chose to take the cash payout option of $74 million.
Both prize amounts would be before taxes are deducted.
The jackpot for Wednesday's drawing will be 40-million-dollars.
A single winning Powerball ticket matching all six numbers has been sold in California and will claim an estimated $447.8 million jackpot.
The earliest the victor could claim their prize was 8 a.m. Sunday; the victor will have one year from the draw date to come forward. The Powerball game is played in 44 states, the District of Columbia, Puerto Rico and U.S. Virgin Islands.