202129
This number is a prime.
A prime that is a concatenation of elements of a primitive
Pythagorean triple (20,21,29). Note that 29 is a prime and
so are 212029, 292021, and 202921. This is the smallest
prime having this property. [Jevtic]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell