Inspired from Numberphile: https://www.youtube.com/watch?v=iFuR97YcSLM Author: Butch Wesley
Creates an Ulam spiral of the specified size and starting point. It knows the first 10,000 primes which are hardcoded in primes.js. The primes were copied from http://primos.mat.br/primeiros_10000_primos.txt
It's been a long long while since I did me some we dev, so this is a bit rough around the edges but it was a fun exercise.