Mondays' numbers are: 5, 12, 20, 24, 29 and Powerball 4.
The Powerball jackpot was at $638 million with an estimated cash value of $321.1 million at the time of Monday's drawing.
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This is the fourth time the jackpot has been more than half a billion dollars this year.
There were at least five tickets across the country sold that matched 5 of the 6 numbers and carried prizes of $1 million or $2 million, depending on the game and the state's rules.
Those tickets were sold in California, Colorado, Georgia, New Hampshire and Pennsylvania.
The California winner was sold at the Donut Storr on Knott Avenue in Anaheim and carried a prize of more than $2 million. California's prizes are paid on a pari-mutuel basis, determined by the game's sales rather than the fixed amounts set by Powerball officials for other states.
MORE: Bay Area airport worker wins $20M from scratcher he bought on lunch break
California seems to have some luck in the national drawing.
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There have been two winning tickets -- worth more than $1 billion each -- back in July and October.
The next drawing is Wednesday at 7:59 p.m. PST.