We salute Gauss, Hadamard, de la Vallee Poussin, and others for the formulation and for the proof of the very important Prime Number Theorem (PNT)! Wow!

Moreover, PNT is one of the greatest theorems of modern mathematics! Wow!

The truth of many important conjectures in number theory follows from PNT. Thank Lord GOD! Amen!

Relevant Reference Links:

'Prime Number Theorem',

https://en.wikipedia.org/wiki/Prime_number_theorem;

'Harmonic Series',

https://en.wikipedia.org/wiki/Harmonic_series_(mathematics).