This question was originally asked in MSE about a year ago. Nobody has answered it. So I posted it here. I wonder why they think it's not research level. Because the question is elementary and every undergraduate student can understand what it means? I have no intention to compare my question with the FLT, but cannot resist the temptation to bring it up. Everybody understands what the FLT means. However, certainly it's research level.

EDIT I have no intention to compare my question with the FLT, but cannot resist the temptation to bring it up.

I would like to change this into the following statement.

I don't think my question is as imortant as the FLT, but cannot resist the temptation to bring it up.