77777...14913 (77777-digits)

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

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7*((10^77777-1)/9)-81432*2 is a lucky 77777-digit number, with 77771 sevens in a row! [Stath]

Submitted: 2020-10-08 20:04:02; Last Modified: 2025-03-23 20:41:58.