5
This number is a prime.
Single Curio View: (Seek other curios for this number)
Every positive integer can be written as the sum of 5
pentagonal numbers. Note that 5 is the only prime
pentagonal number. [Capelle]
Submitted: 2009-07-12 01:47:30; Last Modified: 2009-07-12 14:08:22.
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