73

This number is a prime.

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The largest known prime that starts a chain (generated by the quadratic 73 - x - x2, for x = 0, 1, 2, ... , 7) of smaller, increasingly distant primes with successive gap 2n, (n = 1, 2, 3, ..., 7): 73, 71, 67, 61, 53, 43, 31, 17. [Beedassy]

Submitted: 2009-05-07 07:08:10;   Last Modified: 2009-05-07 14:35:50.
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