23

This number is a prime.

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Kristen Eller ©2002

There are 23 primes which can not be written as a sum of (nonunit) cubes. Note that 23 is the largest prime which cannot be written as a sum of (nonunit) squares. [Hartley]

The only prime in a sequence of six numbers that regularly occurred in the first season of the television series Lost. [Hartley]