77777...77777 (1000-digits)

This number is a probable-prime (likely to be a prime but we have not (re-)proven it on this site).

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

7*(10^1000-1)/9-2*10^275 is the largest 1000-digit near-repdigit prime-digit prime. [Loungrides]