Dec. 18 (UPI) -- The Powerball prize has risen again with $1.5 billion now up for grabs this weekend with an estimated to be $686.5 million in cash.

Saturday's prize is the fifth-biggest Powerball and seventh-largest U.S. jackpot.

"This jackpot is set to deliver the ultimate windfall," according to Matt Strawn, Powerball's product group chair and the Iowa Lottery's CEO.

No ticket matched all six winning numbers -- 25, 33, 53, 62, 66 and Powerball 17 -- so the jackpot increased as a result.

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