1427

This number is a prime.

Just showing those entries submitted by 'Patterson': (Click here to show all)

The smallest four-digit prime such that the following form is also prime: 142⁷ + 14²⁷ + 1⁴²⁷. [Patterson]

The smallest increasing concatenation of 1^1 then 2^2 then...then n^n that is prime, starting with 1. [Patterson]