The Powerball jackpot rose to $643 million for the Wednesday, Aug. 20, drawing after no one won the top prize on Monday, Aug. 18.

After there was no winner in Monday night's drawing, Powerball's jackpot climbed to an estimated $643 million ahead of Wednesday's drawing.

The Powerball lottery jackpot — the biggest of the year — is swelling after nobody won in Monday night's drawing. The jackpot is now $643 million, with the next drawing set for Wednesday night. Although no one took home the full prize, two Powerball players won $1 million each, according to Powerball.