On 22/01/06, Steinar H. Gunderson <[EMAIL PROTECTED]> wrote:
> On Sun, Jan 22, 2006 at 07:23:25AM -0800, balint seres wrote:
> > I suggest two numbers: 13901 and 5019630
> > With a help of this two numbers, we can obtain any longer prim.
> > First, you multiply its.
>
> Any number multiplied by 5019630 is going to be composite, as 5019630 =
> 2 * 3 * 5 * 7 * 1 1 * 41 * 53.
I *think* what he means is this:
Define a_0 = 13901, b_0 = 5019630, a_{n+1} = a_n * b_n, b_{n+1} = a_n
+ b_n. Then b_n is conjectured to always be prime (above a certain n,
I assume, at least).
--
schnee
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