The $1.02 billion prize is for winners who choose the annuity option, paid annually over 30 years. Most winners opt for the cash option, which for the next drawing Friday night is an estimated $602.5 million.
The odds of winning the jackpot are 1 in 302.5 million.
Mega Millions is played in 45 states as well as Washington, D.C., and the U.S. Virgin Islands. The game is coordinated by state lotteries.