The jackpot for the Aug. 20 Powerball has reached an estimated $643million ($290.6 million cash option). The winning numbers in Monday's drawing are 15, 46, 61, 63, and 64, with Powerball number 1. The Power Play number is 3.

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.