7 is the only real variety D for which the equation 2n − D = x2 has over two solutions for n and x organic. Specifically, the equation 2n − seven = x2 is referred to as the Ramanujan–Nagell equation. two hours back By Mashable Staff A MacBook Professional for https://devinhetql.ampblogs.com/7-day-pill-organizers-an-overview-74581811