18721
This number is a composite.
The smallest triangular number that is the arithmetic mean of three consecutive primes (18713, 18719 and 18731). [Bajpai]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell
This number is a composite.
The smallest triangular number that is the arithmetic mean of three consecutive primes (18713, 18719 and 18731). [Bajpai]