The Powerball jackpot rose to $700 million after Wednesday's drawing. What About The UK Powerball Prize? The biggest completed Powerball jackpot of the year so far is a $250.8 million prize won by a lottery player from Arkansas. Those are the astronomical odds a Powerball ticket buyer will need to overcome to win the jackpot prize. further readingMega Millions Ticket Buyer From Florida Wins $800 Million—Here’s What They Could Take Home (Forbes)