Lotto's ramping up its prizes and number of winners and lifting the biggest win from $50 million to $60 million.

It's adding another four Powerballs - which reduces the odds of winning Division One from one in more than 38 million, to about one in almost 54 million. 

Chief executive Jason Delamore says many things have changed since the last change-up to offerings 19 years ago.

"Our population's actually increased by over a million people, so it's very normal for lotteries to tune the Powerball in their lottery games, in keeping with the population." 

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