7 is the sole range D for which the equation 2n − D = x2 has over two answers for n and x normal. Especially, the equation 2n − 7 = x2 is recognized as the Ramanujan–Nagell equation. One day a monk arrived by. They invited him to stay the https://knoxtqjxp.blogoscience.com/44282880/7-day-pill-organizers-an-overview