BALTIMORE — The record-breaking Mega Millions jackpot climbed to $656 million on Monday, though no one holding one of the three winning tickets has come forward yet to claim a share of the prize, officials said.

Three tickets — one each in Kansas, Illinois and Maryland — will split the jackpot, which officials said Monday was higher than previously estimated. It is now at $656 million, after sales from the 44 state lotteries were totaled, up from the previously reported $640 million. That means each winner would receive roughly $218 million apiece before taxes.

In Maryland, a McDonald’s employee claimed to hold the winning ticket and planned to contact lottery officials Monday. But lottery spokeswoman Carole Everett said no one had come forward with the ticket sold at a 7-Eleven store in Milford Mill outside Baltimore.