Mirlande Wilson of Baltimore told WRC-TV in Washington she would claim the jackpot if she finds the ticket.
Wilson had previously said she hid the ticket at the McDonald's where she works.
One of three winning tickets for the record-breaking $656 million prize was sold at a 7-Eleven in Milford Mill. The others were sold in Kansas and Illinois. Kansas officials said Friday that the holder of the winning ticket had come forward.
Lottery officials declined Friday to provide any details about that person or where the winning ticket was purchased. They scheduled an afternoon news conference.
They've previously said the state's winning ticket was purchased a store in northeast Kansas. Winning tickets also were purchased in Illinois and Maryland, making the Kansas ticket worth almost $219 million.
The winner has waited almost a week since the Friday drawing that produced the three winning tickets for the multistate game. But Kansas law allows someone to wait up to a year to claim a lottery prize — and permits them to remain anonymous.