7

This number is a prime.

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The Pollock octahedral numbers conjecture (1850) states that every number can be written as the sum of at most seven octahedral numbers. Frederick Pollock, better known as a lawyer and politician, was a contributor of papers on mathematics to the Royal Society. [Capelle]

Submitted: 2009-08-13 01:23:48;   Last Modified: 2009-08-13 06:06:57.
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