11111...11111 (526-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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The smallest prime of the form k63k, where all the digits of k are identical. [Wu]

Submitted: 2022-02-08 19:37:04;   Last Modified: 2022-02-08 19:39:31.
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