The winning numbers were 6, 7, 16, 23 and 26, and the final number, called the Powerball number, was 4.
Massachusetts State Lottery initially reported that the ticket had been purchased at the Handy Variety convenience store in Watertown, about nine miles west of Boston.
The lottery later corrected that statement, saying the lone winning ticket had been purchased at a Pride Station & Store in Chicopee.
Handy Variety, in fact, sold a $1 million prize, according to the lottery.
The name of the massive jackpot’s winner has not yet been released. The payout, which can be taken in a lump sum or in 29 yearly payments, is estimated to be around $443 million, depending on state taxes.