Little math problem(s) May 2021

[pier4r]

I wanted to leave one little problem as usual, hopefully it won't be too trivial but neither too overwhelming.

This is one among of the shortest math publications


Anyway they didn't provide the code through which they found the result (although one can suspect they optimized it a bit, despite the CDC6600 being a beast at the time).

Thus the task would be to write a code, for a calculator, that finds the counterexample in an optimized way (as otherwise the search space can blow up), of course aside from hardcoding or nearly hardcoding the counterexample.

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Small digression: I have a lot of backlog to catch up but as usual I have to find the time for it (at the end a matter of priority as the days cannot get longer). It is still awesome that the community continues to thrive (I see at the moment 400 active users, I remember in 2019 they were like 200). For example I need to catch up with the results posted here: https://www.hpmuseum.org/forum/thread-9750.html where a lot of results needs to be put on wiki4hp and the first page of the thread. Thank you to continue giving stats and sorry if I am inconsistently caring about some threads since 2019 (others can create parallel lists if they want of course).