210231253
This number is a prime.
The smallest prime formed from concatenation of three
consecutive triangular numbers, i.e., 210, 231, and 253. [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 three
consecutive triangular numbers, i.e., 210, 231, and 253. [Gupta]