Transcript for When Will the Big Powerball Winner Come Forward?
Next tonight, to the mystery surrounding America's newest powerball winner. And here are the first clues. That person bought two tickets, one for the Wednesday drawing, and one for the Saturday drawing, both times using the same Numbers. And it was Saturday that paid off. Here's ABC's Linzie Janis from New Jersey. Reporter: Some of the folks who shop at this neighborhood 7-eleven say they're pretty sure they know who purchased the golden ticket. I buy right in back of her sometimes, I'm right in back of her. Reporter: Today, lottery officials appealing to the mystery buyer to come forward. I want them to sign the back of the ticket, put it in a safe place. Reporter: All we know that she or her purchased the lucky ticket at this store in Trenton, New Jersey, at 5:20 P.M. Tuesday. Lottery officials have already looked at the surveillance footage, as have the store owners, who are getting $30,000 for selling the winning ticket. How well do you know your Kus Americans? Very well, very well. I see them more than my friends. Reporter: Whoever it was picked their own Numbers, playing exactly the same Numbers twice. Once for Wednesday's draw, and once for Saturday's. That Saturday ticket now the sole winner of the nearly $430 million jackpot. The winner even checking the box asking for the lump sum, $284 million cash. David, here in New Jersey, the winner is not allowed to remain anonymous, but has one year to come forward. David? One year. A long time to sit on a secret. Linzie, thank you.
This transcript has been automatically generated and may not be 100% accurate.