Human never knows, if it is a landmine or just a very difficult task. So does not know the AI.

I have an advice against those landmines, though. Do not use all of your time for something which has not been solved for a long time. Also decrease your devotion with time.

I suspect, there were brilliant mathematicians in the past, who spent their entire life to Goldbach's conjecture or something of that kind. That's why we have never heard of them, this "landmine" rendered them obscure. Had they choose something lighter (or even possible) to solve, they could be famous.