EDISON - The Mega Millions lottery has soared to a jackpot of $636 million.

The cash option for tonight’s drawing is estimated to be $341.2 million.

A frenzy of last-minute ticket purchases before tonight's drawing could send it even higher, and possibly past the March 2012 jackpot record of $656 million.

Officials say the jackpot will likely reach $1 billion if there are no winners from this week's drawings on Tuesday and Thursday.