28019

This number is a prime.

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

+ The 28019th triangular number (392546190) is the smallest whose prime factors together (2*3*5*467*28019) are pandigital. [Gaydos]

+ The 666th Cyclops number with distinct digits. [Gaydos]

Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell