7 is the one variety D for which the equation 2n − D = x2 has a lot more than two options for n and x all-natural. Specifically, the equation 2n − 7 = x2 is called the Ramanujan–Nagell equation. At some point a monk came by. They invited him https://senioraidtools.com/auvon-imedassist-7-day-pill-organizer-review/