
Re: Pell type equations
Posted:
Apr 29, 2012 7:13 AM


On Sun, 29 Apr 2012, Terry M wrote:
> correction: so 3x² + 7y² is never 1, 5 or 6 (Mod 8)
This is 100% correct.
I mentioned only the 6 as example but the others are correct as well. The 1 and 5 could have been caught modulo 4, but for the 6 it is necessary to check modulo 8.
 Helmut Richter

