7 is the only number D for which the equation 2n ? D = x2 has over two answers for n and x pure. Specifically, the equation 2n ? seven = x2 is recognized as the Ramanujan–Nagell equation.Naturally There is certainly also the perfectly-recognized Tale of Pharaohs aspiration concerning the seven Fats cows and seven skinny cows.In brief, the meme or… Read More