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Quadratic primes as they relate to #twinprimes and pairs of twin primes
The prime number 233 at the intersection of these two diagonal runs of prime numbers isn’t a twin prime but as an inevitable consequence of the way diagonals work, it’s immediately below the twin primes 197 and 199 and above the twin primes 269 and 271. Above and below that are cousin primes and above and below that are sexy primes.
In isolation I think that would be great but an intersection number like 233 isn’t particularly rare. At a slightly wider view, you can see really clearly where these diagonal runs intersect and in almost every case you’ll find either twin primes or, in a lot of cases, a pair of twin primes above and below the intersection.
One avenue for further research (that’s far above my skill level) is to prove if these runs of quadratic primes are infinite. If they always exist, then the diagonal runs of primes will intersect and wherever they do, you’ll definitely find twin primes, cousin primes, sexy primes. In lots of cases each will come in pairs.
Sidebar about Euler’s prime generating function
If you look to the right of the column of consecutive square numbers there are some amazing examples of quadratic progressions of primes. Notably there’s a diagonal run of primes matching Euler’s prime generating function k2 − k + 41 which has 40 or so consecutive primes.
I'd love to hear anyone's feedback on this. Particularly without a proper name for the quadratic progressions, it makes it impossible for me to google and see what else has been written about them. Happy to discuss or explain things better. Thanks for getting this far.