1999999999999999999979
This number is a prime.
19 9999999999 9999999979
The only non-titanic prime of form p=2*10^n-n, where n is a
composite, (n=21). [Loungrides]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell
This number is a prime.
19 9999999999 9999999979
The only non-titanic prime of form p=2*10^n-n, where n is a
composite, (n=21). [Loungrides]