This number is a composite.

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The largest natural number n for which all odd numbers k relatively prime to n, with 1 < k < n, are primes. It is also the largest for which 2n-p is prime for each prime p in [n, 2n-2]. [Capelle]

Submitted: 2009-10-12 04:42:01;   Last Modified: 2009-10-13 05:56:26.
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