"We haven't done much travel in our lives, but now we're off," the man said.
Elissa Lewis from Tatts Lotteries said the couple had struck largest win on a single Powerball ticket.
In 2008 one ticket bought in Melbourne won A$58.7 million.
Lewis said the odds of winning on a six-game entry were "one in just over 12 million".
Meanwhile in Britain, millions of National Lottery tickets were sold before Saturday night's draw (11am today NZT) for a record £57.8 million ($128m) jackpot.
Tickets were selling tickets at the rate of 400 a second.
But the biggest haul of all is in America where the jackpot for yesterday's Powerball drawing was estimated at US$800 million ($1.22 billion) after no one picked Wednesday's winning numbers.
If not struck this week the jackpot is expected to hit US$1 billion next week.
There have been 18 draws since a Tennessee ticket holder won a US$144.1m jackpot on November 4.
The previous high for a Powerball jackpot was US$590.5 million in May 2013. The largest US lottery prize before now was US$656 million in a March 2012 Mega Millions drawing.
Powerball is available in 44 states plus the District of Columbia, Puerto Rico and the US Virgin Islands.
Powerball winners may choose to be paid in 30 graduated instalments or choose cash instead.