Quote:
Originally Posted by R.D. Silverman
Quote:
Originally Posted by JeppeSN
Yes, I wonder if there is any explanation why the four of them are prime squares. Apparently not. I did check that 2^74207283  7 is not a square, ha ha.
Edit: It has been proved that 2^{p+2}  7 is never going to be square again.
/JeppeSN

Do people not understand the difference between math and numerology?

According to the references in the link, the Diophantine equation
2
^{n}  7 = x
^{2}
is called Ramanujan's square equation. He posed the question of whether it has any solutions for n > 15 in 1913.
So I guess you're asking, did
he understand the difference between math and numerology?