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A Relation Between Triangular Numbers and Prime Numbers

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Published/Copyright: January 24, 2012
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Integers
From the journal Volume 12 Issue 1

Abstract.

We study a relation between factorials and their additive analog, the triangular numbers. We show that there is a positive integer k such that n!=2kT where T is a product of triangular numbers. We discuss the primality of T±1 and the primality of |T-p| where p is either the smallest prime greater than T or the greatest prime less than T.

Received: 2011-03-26
Revised: 2011-05-30
Accepted: 2011-08-04
Published Online: 2012-01-24
Published in Print: 2012-February

© 2012 by Walter de Gruyter Berlin Boston

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