show that x^2 -x + 41 is prime for all integers x with 0<= x >=40 . show , however , that it is composite for x =41.
Last edited by mr fantastic; April 27th 2010 at 04:10 AM. Reason: Re-titled.
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Prime-Generating Polynomial -- from Wolfram MathWorld id:A005846 - OEIS Search Results
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