After several drawings with no winner, the Mega Millions jackpot has soared to $1.1 billion. If someone wins Tuesday night’s drawing, it will be the third-largest jackpot in Mega Millions history, falling behind a $1.5 billion ticket sold in South Carolina in 2018 and a $1.3 billion ticket sold in Illinois last summer. If it seems like these enormous jackpots are happening more often, it’s because they are. And that’s not by chance. “They changed the rules so that the pool of numbers you’re selecting from is bigger, so it’s harder to actually get the winning numbers,” said Lew Lefton, who just retired after 23 years at Georgia Tech, where he was a senior academic professional in the School of Mathematics, as well as Assistant Dean for Information Technology and Associate Vice President for Research Computing with the College of Sciences.