41
This number is a prime.
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The formula (41 + x)2 - x, for x = 2 to 40, yields 34 primes. Composites (five in all) occur only where x is a square. [Sutherland]
Submitted: 2003-12-30 18:21:41; Last Modified: 2008-01-30 17:28:00.
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