From the Mathworld reference above:
An ordinary deck of 52 cards is returned to its original order after 52 in-shuffles, but after only eight out-shuffles!

-QM
--
Quantum Mechanics: The dreams stuff is made of

In reply to Re^2: Perfectly shuffling a deck of cards, over and over by QM
in thread Perfectly shuffling a deck of cards, over and over by FoxtrotUniform

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