258
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]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell