1999999999999999999979

This number is a prime.

                                                    19 9999999999 9999999979

Single Curio View:   (Seek other curios for this number)
The only non-titanic prime of form p=2*10^n-n, where n is a composite, (n=21). [Loungrides]

Submitted: 2015-07-19 13:01:34;   Last Modified: 2018-12-16 07:42:17.
Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell