This number is a composite.

+ 258 is the minimum magic sum of a magic square utilizing sixteen consecutive primes. First found by Allan W. Williams, Jr., of Washington, D.C.

+ The concatenation of all of the permutations of the digits of 258 in order (258285528582825852) falls between a pair of prime twins. Is there any larger number for which this is true? [Gaydos]

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