Sam Safa says many of Reeds Ferry Market regulars have been stopping by since it opened at 5:30 a.m. Sunday to congratulate him and chat about the nation's seventh-largest jackpot.
He says the store in Merrimack, about 25 miles (40 kilometers) south of Concord, is a small, independent business over 100 years old.
The store will receive a $75,000 bonus for selling the winning ticket.
The winning numbers drawn Saturday night were 12-29-30-33-61 and Powerball 26.
The winning ticket was drawn one day after a single Mega Millions ticket purchased in Florida matched all six numbers to claim $450 million.
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