5

This number is a prime.

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The only greater of twin primes, written in base 6, not to end with the digit 1. Because all but the first greater of twin primes is of the form 6n+1, hence ends with (base 6) the digit 1. [Post]

Submitted: 2009-10-14 17:04:36;   Last Modified: 2009-10-14 18:15:56.
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