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How Many Shuffles Do You Really Need to Randomize Your Deck? artwork
Science & Medicine

How Many Shuffles Do You Really Need to Randomize Your Deck?

Quanta Science Podcast by Quanta Magazine

Jul 14, 202629:41Science & Medicine

In 1992, mathematicians Dave Bayer and Persi Diaconis proved that seven riffle shuffles are enough to shuffle a deck of cards — but only if you can cut your deck with precision. Decades later, a new proof has finally ext...

About This Episode

How Many Shuffles Do You Really Need to Randomize Your Deck? is an episode from Quanta Science Podcast by Quanta Magazine. In 1992, mathematicians Dave Bayer and Persi Diaconis proved that seven riffle shuffles are enough to shuffle a deck...

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Episode Details

Published Jul 14, 2026, 29:41 long, audio available.