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Mystery surrounds tonight's monster $150 million Powerball jackpot winner, who officials have declared to be the biggest lottery winner in Australian history.
A single ticket bought in South Australia swept the division one prize pool but the winner was yet to claim their prize hours after the highly anticipated draw.
The winning numbers were 18, 29, 34, 8, 4, 28 and 6 with a Powerball of 11.
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The Lott said a single person bought the ticket but didn't register it to a player card or online account so officials were left with no option but to wait for them to come forward.
The $150 million prize is tied for the third biggest prize ever offered by the lottery game but all the more lucrative draws were won by multiple winners or syndicates.
The Lott spokesperson Khat Intrachai called on anyone who lived in SA or bought a ticket there to check their numbers.
"Someone has become Australia's biggest individual lottery winner and possibly doesn't know it yet," she said.
"Can you imagine unwittingly walking around with a ticket worth $150 million?"
Officials earlier said up to half of Australian adults were expected to buy a ticket as the division one prize surged on the back of six draws in a row without winners.
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The Lott spokesperson Matt Hart said there had only ever been five draws offering a jackpot of $150 million or more.
"If just one person takes home this $150 million prize on Thursday night, they'll make history by becoming the nation's biggest-ever individual lottery winner," he said, before the draw.
"The last time Powerball offered a $150 million prize was in January this year when the peak of sales was at 6.15pm on the day of the draw when 7455 tickets were sold in a single minute."
While The Lott quickly confirmed there was only a single winning entry tonight, it wasn't clear if that was just one person or belonged to a syndicate.
Statisticians say there is a greater chance of being hit by lightning than winning the massive prize but it's a chance millions were willing to take.
The Lott said winners had a year to claim the prize in SA before a process to claim the prize directly from the state government kicked in.
You can get immediate assistance by calling the National Gambling Helpline on 1800 858 858 for free, professional and confidential support 24 hours a day, 7 days a week.
