8

This number is a composite.

Single Curio View:   (Seek other curios for this number)
Let R(n) = (10n - 1)/9 and Tn = the nth triangular number, then P(n) = TR(n) + 1 generates primes for n = 1 through 8. [Wesolowski]

Submitted: 2007-11-29 14:54:25;   Last Modified: 2011-02-06 13:41:21.
Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell