Mark and Cindy Hill appeared at a press conference Friday with their three adult sons and adopted daughter Jaiden, 6, where they were presented with a check for more than $293 million, NBC News reported.
"We're still stunned by what's happened. It's surreal and people keep asking us, 'What are you going to buy with it?' I just want to go home and be back to normal," said Cindy Hill, 51.
Cindy Hill said that when she learned she may have won the jackpot Thursday, she called her husband.
"I called my husband and told him, 'I think I am having a heart attack,'" Hill said. "I think we just won the lottery!"
The other winning ticket was sold at the Four Sons Food Store in Fountain Hills, just outside of Phoenix, Ariz.
State lottery spokeswoman Karen Bach said the winner hasn't come forward there, CNN reported.
"Unbelievable," said Four Sons manager Bob Chebat. "Everyone comes in here buying tickets, joking they'll take care of you if they win. But chances are so slim that it becomes standard that no one does win. I just don't know what to say. I'm shocked. I hope I was the guy who sold the winning ticket."
Meanwhile, the California Lottery Commission unanimously voted Thursday to bring Powerball to the state, the Los Angeles Times reported.
Tickets, which cost $2 each, will go on sale at licensed lottery merchants in April.