331
This number is a prime.
Just showing those entries submitted by 'Gaydos': (Click here to show all)
The smallest prime p such that the concatenation of p and p^2 is a Cyclops number (331109561). [Gaydos]
331 is the smallest integer n that has the same sums of
digits as the nth prime number (2221) and the nth composite
number (412). [Gaydos]
The smallest lucky Honaker number. [Gaydos]
(There are 2 curios for this number that have not yet been approved by an editor.)
Printed from the PrimePages <t5k.org> © G. L. Honaker and Reginald McLean