19219...31071 (72-digits)

This number is a prime.

                                                                          19
2190188176 1671391331 3012910910 3100979491 8682797068 4944323128 2319131071

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

The smallest happy prime formed from concatenation of happy numbers in reverse order. [Gupta]