<p>As always, it depends on what do you expect -- duplicates of older works and "obvious problems" (i.e. those you instantly see after sitting merely 10 years in a topic) are likely to be spotted fast and accurately, but a 3-page proof will end in oblivion. Whether it would get an attention also depends on how innovative the stuff is -- scientists are by-design being amused by dealing with something intriguing. </p>

<p>Thus I think it is a good idea provided that you will not have too high expectations.</p>

<p>About the length -- you can just actually write a mini paper, publish on arXiv or viXra and simply put a link here. Moreover, this way makes it easier to split your doubts in a separate questions (for a better clarity) without sacrificing context. And you can withdraw the mini paper from both (from viXra more completely).</p>
