22222...22229 (176-digits)

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

                                     222222 2222222222 2222222222 2222222222
2222222222 2222222222 2222222222 2222222222 2222222222 2222222222 2222222222
2222222222 2222222222 2222222222 2222222222 2222222222 2222222222 2222222229

+ The smallest near-repdigit prime P greater than a googol found in the sequence 9, 29, 229, 2229, 22229, 222229, 2222229, etc . Curiously, P is expressible as R176 + 7, where R stands for the n-th repdigit. [Bajpai]

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