24

This number is a composite.

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24 is the largest number less than a thousand such that if it is raised to the sum of its digits plus the sum of its digits, plus and minus one, the results are twin primes. I.e., 24^(2+4)+(2+4) ± 1 are twin primes. [Opao]

Submitted: 2003-12-15 03:30:32; Last Modified: 2008-01-30 17:28:00.