The mystery player won the the first prize in Lucky Lotteries Super Jackpot draw 10574, which was drawn on Monday.

The ticket is unregistered, so officials from The Lott say they have no way of contacting the winner.

The winning entry was purchased at Oak Flats Newsagency, 74B Central Avenue in Oak Flats.

Canberrans who've stopped in at the Illawarra on the way to the South Coast are encouraged to check their tickets for the lucky numbers.

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Oak Flats Newsagency owner Victor Costabile said he hoped the winner would be discovered soon.

"We're excited about the win," Mr Costabile said.

"We've been sharing the news with all our customers and everyone is over the moon.

"Every time we check someone's Lucky Lotteries Super Jackpot ticket, we hope they're the winner. So far, that hasn't been the case, so we're just waiting now!"

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The Lott spokesperson Ally Ramsamy said she recommend potential winners to "scout high and low" for a ticket.

"The elusive winner is likely going about their day completely oblivious that they're now $100,000 richer," she said.

"We're encouraging all Lucky Lotteries players who purchased an entry from Oak Flats Newsagency to check their tickets as soon as possible.

"We recommend scouting high and low for any lottery tickets. Previous winners have found their valuable tickets in strange places - like pockets, car glove boxes and the bottom of drawers.

"If you discover you are holding the winning ticket, contact the Lott on 131 868 to begin claiming your prize."

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