75327...32573 (26088-digits)

This number is a prime.

Let R(n)=(10^n-1)/9. As of June 2003, the 26088-digit number (7532*10^14*R(2160)/R(4) + 75753575332572)*R(26088)/R(2174) + 1 was the largest known prime all of whose decimal digits are prime. [Broadhurst]