> Sorry folks, obvious error in my previous message. Not quite
> with it today. Take 2:
> An observation I made suggests that ODD composite nos can be
> described in one of two ways:
> - composite(odd): divisible by 3,5 or 7
> - composite(odd): product of a prime no AND a no. indivisible by
> 3,5 or 7.
Umm well ok. Same response. What about 539? Or 275? Or 325? Or
455? Or 357? And so on, and so on....
Odd numbers are:
- Divisible by one of 3,5 or 7,
- Divisible by none of 3,5 or 7.
And that's it. Will you please let go of this idea that 3,5,7 are
somehow more important? They're not, they're just small primes.