The winning tickets were sold at Cigarettes 4 Discount on 973 Alamo Dr. in Vacaville, and at a Walmart located on 8465 Elk Grove Blvd in Elk Grove.
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Wednesday's jackpot was up to $1.2 billion, the third largest prize in the game's history, with a cash option of $551.7 million.
If someone hits Saturday's drawing, the cash value is estimated at $643.7 million.
The numbers drawn Wednesday night were: 9-35-54-63-64 and Powerball: 1.
The jackpot has grown so large because there have been more than 30 consecutive drawings without a big winner, dating back to July 19.
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The highest Powerball jackpot ever was just over $2 billion.
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The odds of winning the top Powerball prize are 1 in 292,201,338.
Retailers that sell winning Powerball tickets receive a bonus of 1% of the prize amount.
10 biggest Powerball, Mega Millions jackpots won in US lottery history: LIST
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Winners have one year from the date of the winning draw to claim their prize.
Powerball tickets are $2 per play. Tickets are sold in 45 states, the District of Columbia, Puerto Rico and the U.S. Virgin Islands.
SEE ALSO: Why does the Powerball jackpot get so high?