1601
This number is a prime.
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x2 - 79x + 1601 gives primes for x = 0 to 79, with one repetition of each prime obtained. Note that 79 and 1601 are primes. [Capelle]
Submitted: 2003-06-21 18:20:59; Last Modified: 2008-01-30 17:28:00.
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