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Mega Millions will grow to $2 billion if there is no winner Tuesday

There's been no Mega Millions winning ticket since July 24. The current jackpot is $1.6 billion.

It might wind up having to be called Mega Billions.

If no one picks all six numbers in Tuesday night's record-breaking $1.6 billion Mega Millions draw, it will roll over to a Friday jackpot worth an estimated $2 billion, said Carole Gentry, a spokesman for Maryland Lottery and Gaming.

The Mega Millions jackpot has been growing since the last winning draw, on July 24, when 11 co-workers from Santa Clara, Calif., chipped in on the winning $543 million ticket.

Mega Millions tickets are sold in 44 states, the District Columbia and the U.S. Virgin Islands.