The mystery woman, who lives with her mother, said she initially thought she had won $5000 and refused to believe she had actually won $526,661.35 until she received a phone call from Tatts officials.

She was one of just two division 2 winners in Australia.

“I was looking at it and a row lit up yellow and I thought I’d won around $5,000 and then realised there were more zeros,” she said.

“I went out to check with Mum and she wrote out all the winning numbers and I just kept thinking ‘am I seeing this right?.

“We said we wouldn’t believe it until I got the phone call from Tatts.”

The lucky winner, who wished to remain anonymous, said she would spend her money on house renovations and a new car.

And for the record, the luck numbers were: 25, 38, 43, 21, 41 and 30.