11939...91193 (29-digits)

This number is a prime.

                                             119391193 9119391113 9119191193

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

A prime number obtained by concatenating the five right-to-left circular permutations of the circular prime 11939, and by inserting four 1s as separators between the five concatenated primes. [Necula]