Who says you can’t do complex analysis in Excel...
Prime Counting function using the first 200 non trivial zeroes of the Zeta function (and first 5 trivial ones). Equation used is the main sum in the top with an approximation if you want a simpler expression to try.
Main point of the famous paper by Riemann is using the zeta zeroes you can calculate the number of primes below a number, they are one in the same, interwoven in math.
The zeroes can be found easiest using the Riemann Siegel functions lower graph (also just using excel).



















