The SuperLotto Plus jackpot winner, identified as Cora P., matched all six numbers with a Quick Pick ticket she had purchased in San Lorenzo.
The cash option for the ticket is estimated at $7.9 million, lottery officials said.
The winning numbers were 35, 16, 2, 5, 31 and Mega 14.
The woman bought the ticket at Kavanagh Liquors at 500 Via Mercado. The store will receive $55,000 for selling the winning ticket.