All Episodes of Numberphile

Season 1

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  11.11.11

  Season 1 Episode 1 - Aired 11/8/2011

  Numberphile video about number 11, marking the last binary day of a generation: 11.11.11. Exploring barcodes, check digits and CD technology. Filmed at the home ground of Nottingham Forest Football Club, The City Ground.

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  255 and Pac-Man

  Season 1 Episode 2 - Aired 11/17/2011

  Explaining binary to understand why Pac-Man becomes unplayable after 255 levels.

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  16

  Season 1 Episode 3 - Aired 11/23/2011

  We discuss the number 16 - a perfect square - and how sitting at table 16 led to something bigger for Matt Parker. In this video is Dr Ria Symonds from the University of Nottingham.

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  8128 and Perfect Numbers

  Season 1 Episode 4 - Aired 11/28/2011

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

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  6174

  Season 1 Episode 5 - Aired 12/5/2011

  6174 is also known as Kaprekar's Constant.

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  69!

  Season 1 Episode 6 - Aired 12/8/2011

  69 is the largest number that most hand-held calculators can factorialize!

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  220 and 284 (Amicable Numbers)

  Season 1 Episode 7 - Aired 12/19/2011

  Why do 220 and 284 get along so well? Dr James Grime introduces us to the world of so-called amicable numbers.

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  15 bumfit

  Season 1 Episode 8 - Aired 12/22/2011

  Numbers can be interesting when studied in different languages and dialects - such as in Lincolnshire where we have dik, figgit and bumfit.

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