Are there any answers to Brocard's problem other than 4, 5, and 7?
6
150á¹€3032100
7%
chance
1H
6H
1D
1W
1M
ALL
https://en.wikipedia.org/wiki/Brocard%27s_problem
Resolves once a proof is well-accepted among the mathematical community. If it's proven to be unprovable or not well-defined, resolves N/A.
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The facts "standard heuristic arguments suggest that there are only finitely many solutions" and "extensive numerical search shows that there are no unknown small solutions" are strong evidence for there being no more solutions. (Apparently also the ABC-conjecture implies that there are only finitely many solutions.)