258
This number is a composite.
Just showing those entries submitted by 'Gaydos': (Click here to show all)
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