In article <_9qdnbY6rMCzjdfXnZ2dnUVZ8tZi4p2d@bt.com>, firstname.lastname@example.org says... > Dik T. Winter said: > > > In article > > <email@example.com> > > Musatov <firstname.lastname@example.org> writes: ... > > <snip> > > > > Shown: > > > 2*4+1=9+2=11 prime > > > 2*24+1=49+2=51 prime > > > > Since when is 51 prime? > > It's odd, right? And primes (ignoring 2, which is clearly > experimental error) are odd, right? Therefore, 51 is prime, QED. > Come now Richard, you have to ignore 3 and 17 as well to prove that 51 is prime.