Tiffany Brown of Dorchester is the winner of a $1 million Powerball prize after the first five numbers on her Quic Pic ticket matched those selected in the game’s Monday, September 18 drawing that featured a $638 million jackpot. Brown claimed her $1 million prize (before taxes) Wednesday, September 20 at the Massachusetts State Lottery’s Dorchester headquarters. Her winning ticket was purchased at Supreme Liquors located at 506 Geneva Ave. in Dorchester. She said that a friend had encouraged her to play because of the large jackpot. The store receives a $10,000 bonus for its sale of this ticket.