This number is a probable-prime (likely to be a prime but we have not (re-)proven it on this site).
Single Curio View: (Seek other curios for this number)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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