13432Re: [PrimeNumbers] Composite nos
- Sep 1, 2003On Mon, Sep 01, 2003 at 11:04:21AM -0000, navid_altaf wrote:
>Are you being serious? What do you mean? What about 225? Have you
> An observation I made (checked for the range 3-10000)suggests
> that ODD composite nos can be described as follows:
> - composite(odd)< 121 : divisible by 3,5 or 7
> - composite(odd)> 121 : will always be the product of a
> prime no AND a no. indivisible by 3,5, or 7
> Is it possible to prove this?
> Any examples of where this does not hold?
thought about this at all? So once you get past 121, there are no
numbers divisible by 7 and 3? Or 5 and 7? Or 3, 5 and 7? What are you
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