12212...23123 (735-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 formed from two consecutive numbers n (122 and 123) with each number repeating n times. [Gupta]

Submitted: 2019-11-04 23:56:02; Last Modified: 2020-06-13 13:13:34.