10131923
This number is a prime.
The smallest prime formed from concatenation of the four
consecutive Happy numbers, i.e., 10, 13, 19 and 23. [Gupta]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell
This number is a prime.
The smallest prime formed from concatenation of the four
consecutive Happy numbers, i.e., 10, 13, 19 and 23. [Gupta]