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I was looking at the paper Zum Hilbertschen Nullstellensatz [1] and wondered if there was a shorter mathematical paper than this one. A colleague of mine rumored about a number-theoretic paper where just a counterexample consisting of a few numbers is given, and he conjectured that it must be the shortest mathematical paper. However, we were unable to find it. I would be very curious to see it.

So, I am asking you for references to papers that are shorter at least than [1] and if possible, as short as said number-theoretic paper. Thanks a lot in advance. Also, I am sorry if this question is too far off-topic.

[1] J. L. Rabinowitsch, *Zum Hilbertschen Nullstellensatz*, Mathematische Annalen Volume 102, Number 1 (1929), 520.