It's because of coordination between states. From the MegaMillions website:
> Unlike some multi-state or multi-country lotteries that have central offices, all Mega Millions duties are shared by member states as part of their membership in the game.
Each state handles their own tickets and they don't all use the same software systems to manage them.
> Unlike some multi-state or multi-country lotteries that have central offices, all Mega Millions duties are shared by member states as part of their membership in the game.
Each state handles their own tickets and they don't all use the same software systems to manage them.