Seven is the only real amount D for which the equation 2n − D = x2 has a lot more than two remedies for n and x purely natural. Specifically, the equation 2n − seven = x2 is named the Ramanujan–Nagell equation. The mourners sit Shivah in the home of https://marcohdbgq.loginblogin.com/45719207/7-day-pill-organizers-for-dummies