I once read that anyone who actually finds a SHA256 collision should publish it in a paper. SHA256 collisions are supposed to be the just shy of impossible to f

I once read that anyone who actually finds a SHA256 collision should publish it in a paper. SHA256 collisions are supposed to be the just shy of impossible to find (you know, the whole old trope of millions of machines millions of times faster than the ones we have now working for millions of years will find a collision at some point). Some confirmation of this would be welcome.