This number is a composite.

Just showing those entries submitted by 'Kulsha': (Click here to show all)

+ 665 - 5 is the smallest prime of the form ac - b, where b = a - 1. Note that c is the concatenation of a and b. [Kulsha]

Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell