While the odds of winning the jackpot are about 1 in 292 million, we're betting that won't stop more than a few people from picking up a ticket before the next drawing on Wednesday. If someone claims the $400 million prize, it will be among the largest lottery jackpots in U.S. history.
While you're dreaming of what you'll spend your winnings on, here's a look at the 10 largest lottery jackpots and some of the lucky people who won big.
- 10. $390 million (Mega Millions)
Won March 6, 2007. Winning tickets sold in Georgia and New Jersey.
9. $399.4 million (Powerball)
Won Sept. 18, 2013. Winning ticket sold in South Carolina.
The anonymous winner said it was only the second time he had played the lottery.
8. $414 million (Mega Millions)
Won March 18, 2014. Winning tickets sold in Maryland and Florida.
Raymond Moyer and Robyn Collier from Merritt Island, Fla. said they planned to use their newfound wealth to travel and attend as many Notre Dame football games as they could.
7. $425.4 million (Powerball)
Won Feb. 19, 2014. Winning ticket sold in California.
Northern California retiree B. Raymond Buxton waited until April Fool's Day to come forward to claim his winnings. He said he couldn't sleep for days after he realized he had won.
6. $448.4 million (Powerball)
Won Aug. 7, 2013. Winning tickets sold in New Jersey (2) and Minnesota.
Paul White of Ham Lake, Minn. said he had often imagined winning many times before he won.
The Ocean's 16 group were all employees of Ocean County, New Jersey and many said they intended to stay at their jobs for the near future.
Mario Scarnici from Monmouth Junction, New Jersey did not share his plans for his winnings.
5. $564.1 million (Powerball)
Winning tickets were sold for this jackpot in Texas, North Carolina and Puerto Rico on Feb. 11, 2015.
4. $587.5 million (Powerball)
Won Nov. 28, 2012. Winning tickets sold in Missouri and Arizona.
Cindy and Mark Hill of Dearborn, Mo. said they planned on paying for the college educations for their four granddaughters and their four nieces and nephews. The following year, an email phishing scam reportedly used the Hills' name and the promise of a share of their fortune to acquire bank account numbers.
3. $590.5 million (Powerball)
Won by Gloria MacKenzie on May 18, 2013. Winning ticket sold in Florida.
2. $648 million (Mega Millions)
Won Dec. 17, 2013. Winning tickets sold in Georgia and California.
Ira Curry of Stone Mountain, Ga. said her winning numbers were a combination of family birthdays and the family's lucky number -- 7.
San Jose, Calif. resident Steve Tran had purchased multiple tickets at multiple stores on his route as a delivery driver and realized he had been to the winning store in the middle of the night.
1. $656 million (Mega Millions)
Won March 30, 2012. Winning tickets sold in Maryland, Illinois and Kansas.
Merle and Patricia Butler of Red Bud, Ill. kept their win a secret for nearly three weeks before coming forward to claim their prize. The couple, married for 41 years at the time of their win, said they planned to buy a new car and attend a few St. Louis Cardinals games. Last year, someone claiming to be Merle Butler on Instagram said he was giving away his winnings, but Butler told TMZ he didn't even have an Instagram account.
The Maryland winners referred to themselves as "The Three Amigos." All worked in Maryland's public education system and pooled their money to buy 60 tickets. They joked that they planned to celebrate their win by getting matching tattoos of the winning numbers.
Powerball is played in 43 states, Washington, D.C., and the U.S. Virgin Islands.
The Associated Press contributed to this report.