Many first timers were joining in, after no one won on Saturday, setting Wednesday's drawing at $425 million.
But since then, thanks to a huge increase in sales, the prize amount was boosted up to a cool half billion dollars.
If sales continue as they're going, the prize could very well be higher than that.
Forty two states, and the US Virgin Islands, participate in the lottery game.
This is the highest amount it has hit, and close to the highest dollar figure that any lottery has gotten too.