167

This number is a prime.

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

There are two 167-digit numbers consisting of only two distinct digits which are of the form p*2^167 with p prime. They correspond to the numbers containing only the digits 6 & 7, and 8 & 9. [Rupinski]

Wieferich proved that 167 is the only prime requiring exactly eight cubes to express it. [Rupinski]