4 ms·> For 3, 3 is the only example. Or 7, or 31, or 127.by debacle 14y ago> For 3, 3 is the only example. Or 7, or 31, or 127.rprospero 14y ago8, 32, and 127 are powers of two, but they're odd powers. None of them are squares.debacle 14y agoAh, very correct! I misread the initial question.