13

This number is a prime.

Single Curio View: (Seek other curios for this number)

13^13 - π(13)^π(13) is prime. It is the largest known prime with this property. The next prime of this form (if it exists) will have more than 50000 digits. [Firoozbakht]

Submitted: 2009-09-05 01:04:02; Last Modified: 2009-09-05 01:42:17.