G-Jun Yam/AP The Mega Millions jackpot is at $458 million as of Tuesday morning. Though that's a pretty big prize, working through the math of how lotteries work suggests that buying a ticket is not a great investment. The low probability of winning and the risk of splitting the prize in a big, highly covered game mean you'd probably lose money. The Mega Millions jackpot for Tuesday's drawing is up to $458 million as of 11:30 a.m.