SPRINGFIELD, Maine – If you bought a Megabucks lottery ticket at Smith’s General Store on Wednesday night, you might be $550,000 richer, and don’t know it yet.

Maine State Lottery officials told store owner Aaron Smith on Thursday that Wednesday’s winning ticket — with numbers 10, 13, 20, 25, 31, 37, and bonus: 28 — was purchased at his store, but as far as he knows, no one has claimed it yet, he said.

“I wish we knew who it was,” Smith said Sunday. “Nobody’s come forth; nobody knows anything.”

State lottery offices are closed Sundays. State lottery officials did not immediately return telephone messages seeking confirmation of Smith’s account.

As of Sunday afternoon, the state lottery’s Web site, www.mainelottery.com, listed the winning numbers but did not state that the winning ticket had been sold or claimed.

The site lists Wednesday’s Jackpot as being estimated at $550,000.

Saturday’s winning numbers are listed as 5, 17, 21, 29, 33, 36, and bonus: 26. All tickets expire one year after they are drawn.

“My worst nightmare,” Smith said, “is for the person who may have lost it, can’t find it, burnt it, who knows? I am worried for somebody who could be a half-million richer and just threw it out the window.”

Winning tickets must be validated on the Maine State Lottery’s system for final winner verification.