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Prime Time with the Ulam Spiral
on 11 Oct 2022
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% Polar remix of the Ulam Spiral
% https://en.wikipedia.org/wiki/Ulam_spiral
n=2:200^2;
t=n(isprime(n));
polarscatter(t*180/pi,t,2,'y','filled')
axis off
set(gcf,'Color','k')