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Numberphile

Season 1 · Episode 4

8128 and Perfect Numbers

0.0November 28, 2011

For many years, 8128 was the largest known perfect number. But what is a perfect number?

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Episode 111.11.11
Episode 2255 and Pac-Man
Episode 316
Episode 48128 and Perfect Numbers
Episode 56174
Episode 669!
Episode 7220 and 284 (Amicable Numbers)
Episode 815 bumfit