1.2824271291006226368...

This number is neither prime nor composite.

                                  1.2824271 2910062263 6875342568 8697917277
6768892732 5001192063 7400217404 0630885882 6461129736 4919582023 7441024...

The Glaisher-Kinkelin Constant is related to the series 1^1 + 2^2 + 3^3 + ... + n^n, the Gamma Function, and the derivative of the Riemann Zeta Function (crucial to the distribution of prime numbers). [Post]