Sierpinski and Riesel number (Fixed k, Variable base)
Has there been any work done to find S/R for fixed k and variable base?
eg. What is the lowest base=b for k=2 such that 2*b^n+1 is never prime?
What k's can never be sierpinski numbers? Is there any proof to this.
How does one generate the sierpinski base for a given k?
(The same questions for Riesel side)
