All eyes are on the Mega Millions jackpot after a 20 percent rise in sales this weekend brought it to $586 million. The prize, to be drawn Tuesday night, is the second largest in U.S. history—falling behind the $656 million jackpot last year. Mega Millions’ lead director Paula Otto predicts that up to 75 percent of the 259 million possible combinations will be purchased in time for the draw. If the company sees a spike in sales Tuesday, the jackpot may have the potential to top last year's kitty. "I think we'll be very close to the record, and maybe even surpass it," said Otto.