Mega Millions jackpot tops $1 billion after no one won $830 million top prize

The Mega Millions jackpot has crossed the $1 billion threshold. The grand prize in Friday night's drawing will be an estimated $1.02 billion, lottery officials said, though that's certain to grow as more and more tickets are bought as that drawing approaches.

The cash option for that pot of gold would be $602.5 million.

No winning tickets were sold for Tuesday night's drawing, which had a jackpot of $830 million. It would have been the nation's fourth-largest lottery prize of all time and third-largest Mega Millions prize.