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interesting hobbyhere are some links to explore:https://mathworld.wolfram.com/PrimeSpiral.htmlplay withhttp://lab.ejci.net/UlamSpiral/https://rosettacode.org/wiki/Ulam_spiral_(for_primes)
interesting hobby
here are some links to explore:
https://mathworld.wolfram.com/PrimeSpiral.html
play with
http://lab.ejci.net/UlamSpiral/
https://rosettacode.org/wiki/Ulam_spiral_(for_primes)
