Popular Culture
In the 2007 Doctor Who episode "42", a sequence of happy primes (313, 331, 367, 379) is used as a code for unlocking a sealed door on a spaceship about to collide with a sun. When the Doctor learns that nobody on the spaceship besides himself has heard of happy numbers, he asks, "Don't they teach recreational mathematics anymore?"
The contestants in the 2012 University Challenge final were asked to identify a sequence of numbers as happy primes in a picture round.
Read more about this topic: Happy Number
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