Play is sure to be heavy today at many Virginia Lottery outlets. That’s because tonight’s MegaMillions jackpot is one of the largest in the game’s history: at least $512 million.  MegaMillions has been around for 16 years, and this will be just the seventh time in the game’s history that the jackpot has surged past the $400 million mark, let alone exceeding a half billion. Its top prize came in March of 2012: $651 million, but we are still far away from the largest American lottery jackpot ever, a $1.6 billion Powerball mother lode in January of 2016.