If you're interested in prime number theory and the Riemann hypothesis, I'm guessing you'll probably be interested in the attached document in which I illustrate Fourier series for prime number counting functions including Riemann's prime number counting function and Chebyshev's prime number counting function. I also included a couple of plots from the document below which I believe best illustrate the essence of the information contained within the document.
Fourier Series for Riemann's Prime Counting Function:

Fourier Series for Chebyshev's Prime Counting Function:

I added the Raspberry Pi group to this post because I created the attached document and performed all of the evaluations contained within the document using the Mathematica version which comes bundled with the Raspbian operating system. A complete evaluation of the attached document takes approximately one hour with Mathematica running on a Raspberry Pi 3 Model B.