The jackpot for tonight’s Mega Millions drawing — after 21 straight without a grand prize winner, could top $600 million. And if the trend continues it could hit the billion dollar mark.

The epic jackpot is at a whopping $586 million and climbing. It is one of the biggest jackpots in the world right now, and the fourth largest in U.S. history. If no one wins Tuesday, it will likely surpass the largest U.S. payout set in March 2012 by over $100 million, and has the potential to become the largest lotto in mega millions history.