"scott" <sco### [at] laptopcom> wrote in message news:4a115772@news.povray.org...
> >  What is the smallest number for which it's unknown whether it's prime
> > or composite?
>
> 1000000000000000000000000000000000
>
> Oh, wait, you just worked out that is composite in your head, so ermm I
> guess it's
>
> 1000000000000000000000000000000001
>
> now :-)

7 x 11^2 x 13 x 23 x 4093 x 8779 x 599144041 x 183411838171

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