- --- In primenumbers@yahoogroups.com,

Kevin Acres <research@...> wrote:

> I expect this to give an extra 6 or so 15/16 chains on

The bad news, of course, is that Poisson gives you

> top of the 18 I have now.

no credit whatsoever for the 18 previous failures.

Your chance of success with the next 6 is about

1 - exp(-6*mu) =~ 50%

if we are are right about the mean probability

mu =~ 1/9.

Good luck!

David - --- In primenumbers@yahoogroups.com,

Kevin Acres <research@...> wrote:

> x=a*x+b either is a square or has a square as a major factor.

Suppose that we want to start with a square and get a square.

Then we must solve the Diophantine equation

y^2 = a*x^2 + b

For any pair (a,b), Dario will tell us all the solutions:

http://www.alpertron.com.ar/QUAD.HTM

David