(CNN) - More proof of just how incredibly unlikely it is to win the Powerball jackpot.

No one’s done it since May 31.

That means the jackpot is rolling over after no one won again on Monday night.

Now, it’s expected to reach $815 million before Wednesday’s drawing, something that would make it the seventh largest in the lottery’s history.

The cash value of that payout, if taken in a lump sum, would be about $368 million.

The jackpot could go even higher if more people than expected buy tickets.

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