18919
This number is a prime.
The smallest invertible prime that is the sum of three
consecutive invertible primes, i.e., (6101 + 6199 + 6619). [Jha]
The smallest five-digit invertible prime such that the sum
of itself and all truncations of itself +/- 1, i.e., (18919
+ 1891 + 189 + 18 + 1) +/- 1 is a twin prime pair {21019,
21017}. [Bajpai]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell