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Pastimes : My House -- Ignore unavailable to you. Want to Upgrade?

To: Lazarus_Long who wrote (4557)	1/23/2003 8:44:42 PM
From: TimF	Respond to of 7689

That SHOULD have read: I know. Since I make enough mistakes like that myself I normally don't point them out but somehow yours struck me as particularly odd. It delivers primes up to 41. But F(41) = 41^2. Yeah I had to try it the straightforward but hard way. This one was another problem where you need out of the box thinking. Actually F(41) is 41^2 + 41 +41. But that is still not a prime because it is 41*43. I wonder about figures past 41. I guess for multiples of 41 it is not a prime, but are there any other numbers for which this function does not generate a prime? Tim