Merle Butler, 65, of Red Bud, Ill., came forward with his wife Patricia Wednesday as the winner of the March 30 Mega Millions drawing.
The Mega Millions game is undergoing big changes in October.
Lottery officials say the game matrix is being revised to increase the number of prize winners among those who purchase the $1 tickets.
The minimum jackpot for Mega Millions is going from $12 million to $15 million, and will grow by at least $5 million after each drawing if nobody matches the numbers.
Mega Millions drawings will still consist of five white balls and one gold ball for a total of six winning numbers.
Under the new system, the number of white balls will increase from 56 to 75, and the number of gold balls will decrease from 46 to 15. The changes mean the new overall odds of winning a prize are one in 15.