- Sep 1, 2003An 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?
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