> Elias Daher wrote:
> 
> Hey everybody,
> Look at that:
> 
>                           (2^2-1) is prime! (=3)
> 
>                             (2^[2^2-1]-1) is prime! (=7)
> 
>                             (2^[2^(2^2-1)-1]-1) is prime! (=127)
> 
>                             (2^[2^(2^[2^2-1]-1)-1]-1) is prime!
> (=170141183460469231731687303715884105727)
> 
> So why wouldn't:    (2^[2^(2^[2^(2^2-1)-1]-1)-1]-1) be prime?!
> (=2^170141183460469231731687303715884105727-1)

And all the rest of the Daher numbers?     ;-)

> 
> Well, I wish I will live enough (maybe thousands of years!!!) to see
> this number tested!
> 
>             Elias Daher

Gerry
-- 
mailto:[EMAIL PROTECTED]
Gerry Snyder, AIS Director & Symposium Chair, Region 15 RVP
Member San Fernando Valley, Southern California Iris Societies
in warm, winterless Los Angeles--USDA 9b-ish, Sunset 18-19
my work: helping generate data for: http://galileo.jpl.nasa.gov/
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