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42n+n^2+(n-1)^2 generates at least 50% prime numbers up to 20,000,000 and up to n=3160 at least 50% of the numbers are prime for all positive values of n. There are 85 primes in the first 100 positve values of n. [Homewood]

Submitted: 2012-04-18 17:04:04;   Last Modified: 2020-11-16 21:14:16.
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