Powerball is a national Australian lottery game operated by state and territory licensees, including The Lott brands and the government-owned Lotterywest in Western Australia. It launched in 1996, four years after the US version, and has undergone major format changes—most recently in April 2018, when it shifted to drawing seven numbers from 35 and a Powerball from 20, making the odds of winning the top prize 1 in 134,490,400. The game's highest jackpot was A$200 million on 1 February 2024, shared by two ticket holders, while the largest single-ticket win was A$150 million in May 2024. Winners always receive lump-sum parimutuel payouts, and most jackpots are won by a single ticket. Notable records include a A$100 million pool in August 2018 (split between Melbourne and Sydney winners) and a A$55 million prize in January 2018 that went unclaimed for nearly six months before being claimed anonymously just days before it would have been transferred to the Victorian State Revenue Office. The game has evolved to offer more prize divisions (now nine) and bigger jackpots, but the odds have become significantly harder over time.