Two tickets bought in California - one in Ontario and one in Milpitas - had 5/5 of the numbers, but missed just the Powerball number.
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The 5/5 tickets each carry a prize of $1.04 million, according to the California Lottery.
Having that one extra number - the Powerball of 23 - would have jumped that payoff to $1.2 billion.
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Instead with no winners, Saturday's prize now grows to $1.5 billion - close to the all-time Powerball record of $1.586 billion that was won in 2016 but split between three tickets.
If the winner takes the cash option instead of annual payments, it would be a lump sum of $745.9 million. Minus taxes, of course.
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The $1 million Ontario ticket was sold at Eastland Food Market, 1072 E G St.
The Milpitas ticket was sold at a 7-Eleven at 1838 Milmount Dr.
The winning numbers for Wednesday's drawing were 2-11-22-35-60 and PB 23.
There were 16 tickets sold across the country that carried a $1 million prize, plus three others with a $2 million award because of the Power Play option.
The odds of hitting all five numbers plus the Powerball are about 1 in 292 million.