Is there a list somewhere of all the problems that Erdős offered cash awards for, including both solved and unsolved problems? One would think that the answer is yes, but so far I have had no luck finding such a list.
Greg Kuperberg compiled a partial list, which he posted in the answer to another MO question, but I don't think it is complete; in particular, it seems that Kuperberg's list does not include the problem recently solved by Oliver Janzer (Disproof of a conjecture of Erdős and Simonovits on the Turán number of graphs with minimum degree 3), although it does include a related problem. (Incidentally, Janzer's remarkable result is what prompted me to ask this question, since I was wondering if there were any other cases where Erdős offered more money for a counterexample than a proof and yet the conjecture was false.)
There is also a related list on Wikipedia as well as a similar MO question that I asked a while ago, but these don't quite answer my question (although Fan Chung and Ron Graham's book Erdős on Graphs: His Legacy of Unsolved Problems presumably contains all the graph-theoretic problems that Erdős offered money for).
