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Powerball Jackpot: Winner To Be Revealed
The holder of one of two tickets sharing a record $587.5m (£366.7m) Powerball jackpot will be unveiled later.
One ticket was bought at a Trex Mart convenience store in Dearborn, a small town in Missouri about 35 miles (56km) north of Kansas City.
The other winning ticket was sold in Arizona, at a 4 Sons Food Store in Fountain Hills, just outside of Phoenix.
The Missouri Lottery said it had verified the ticket and would unveil the name of the winner at a news conference at a Dearborn high school later on Friday.
Missouri Lottery chief operations officer Gary Gonder did not provide any details, including whether the ticket had been bought by someone from Missouri.
The Trex Mart store will be awarded $50,000 for selling the winning ticket.
The winners could split a cash payout of $384.7m before taxes, or about $192m per ticket, and have six months to claim their prize money.
It was not clear whether the tickets belonged to individuals or had been purchased by groups.
The odds of winning Wednesday night's draw were estimated to be one in 175 million.
Americans went on a ticket-buying spree in the run-up to the lottery, the big money enticing many people who rarely, if ever, play the lottery to purchase a shot at the second-largest payout in US history.
Tickets sold at a rate of 130,000-a-minute nationwide, about six times the volume from a week earlier, which pushed the jackpot even higher.
The jackpot had rolled over 16 consecutive times without a winner.
Powerball's website crashed shortly after the winning numbers - 5, 16, 22, 23, 29 and Powerball of 6 - were announced, as did that of the Multi-State Lottery Association, which oversees Powerball.
Besides the jackpot, Powerball players can win as much as $1m if they hold tickets with most but not all the drawn numbers, but many people are unaware of these prizes and they can end up going unclaimed.
The biggest jackpot in US lottery history of $656m was claimed in March 2012 by MegaMillions players in Kansas, Illinois and Maryland who all held tickets bearing the same winning numbers.