The $15 million ticket was bought at this store, but the winner has yet to collect the prize. PHOTO: Damon Higgins/The Palm Beach Post

A jackpot ticket bought in Lake Worth, Florida is waiting for an owner.

The Florida Lottery ticket was bought April 22, 2015 and expires 6 months after. The identity of the winner still remains a mystery.

The winning ticket was bought on April 22 at The Beer & Liquor Store in western Lake Worth. The winning ticket numbers — 11-13-14-21-35-43— expire Oct. 19 at midnight.

It's happened before. A Powerball ticket worth $16 million became worthless in 2013 after a six-month deadline for the winner to claim the prize money expired, Florida lottery authorities said.

Amy Bisceglia"It's only happened a few other times, so this is really, really unusual," said Florida Lottery spokeswoman Amy Bisceglia.

"It could have been anything, from somebody forgetting about it in the laundry, or just throwing it away. We have no idea what happened," Bisceglia said, when asked how the ticket holder could not have claimed the fortune.

The ticket became worthless when a 180-day deadline to claim the jackpot expired at 11:59 p.m. EST on Thursday (0459 GMT Friday), Bisceglia said.

It was the largest unclaimed jackpot in Florida since 2003, when a $53.7 million jackpot expired.

ABOUT FLORIDA LOTTERY EXPIRY DATES:

Prizes in Florida Lottery terminal games (FLORIDA LOTTO^®, MEGA MILLIONS^®, POWERBALL^®, LUCKY MONEY™, FANTASY 5™, PLAY 4™ and CASH 3™) must be claimed within 180 days of the applicable draw date.

Florida Lottery Scratch-Off game prizes must be claimed within 60 days of the official end-of-game date. FLORIDA LOTTO, MEGA MILLIONS, POWERBALL, and LUCKY MONEY jackpot winners who want to receive a one-time lump-sum payment must claim their prizes within 60 days after the applicable draw date. Once the applicable time period has elapsed, the related Florida Lottery ticket will expire.

If you want to start winning the lottery now, then get my System today for only $39.95. Your next step is to use LottoPredict to speed up your win rate, and that's just $6.60/month. Get them together here.

Got those already? Then just add PRO for the fastest way to win and you're set.