Re: Prime Number Question


..
>
> So, while all primes are in column 1 or 5, not all numbers in those colums
> are prime.
>
> Still a neat solution but I think it needs that extra bit to avoid giving
> the impression that this is a "test for primeness"
>

Yes, of course. I hadn't meant this at all. Just got bored of typing!
:)


.

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