\" \" The Powerball jackpot stood at $620 million and Mega Millions at $1.6 billion, for a combined possible total of over $2.2 billion, in October, 2018. How and when did lottery jackpots get so huge? AdvertisementAdvertisementSo why are lottery jackpots growing so mind-bogglingly enormous now? Then, in October 2017, Mega Millions made its own changes to make it more difficult to win. A single person in South Carolina picked the magic Mega Millions numbers on October 23, 2018, to win the $1.537 billion jackpot.