From: "mcnamara_gio" <mcnamara_gio@...>

To: <primenumbers@yahoogroups.com>

Sent: Monday, April 25, 2005 7:21 PM

Subject: [PrimeNumbers] prime form

What do you think about this sequence a(n)=n^2+7n-1. Its terms are

usually prime. I have calculated that 72% of a(n) so that n<500 is

prime. 81% of a(n) is prime when n<5000. 85.6% of a(n) is prime when

n<50000 and 88.5% of a(n) is prime when n<500000. I am going to find

more prime terms in this sequence. What do you think about it?

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I think that you have mistaken the percentages of no-primes with the percentages of

primes. Can you recheck it?

Jose Brox.