31313...16161 (744-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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A prime concatenating a prime p, p times, from p = 31 to 61. [Rivera]
Submitted: 2019-04-01 13:42:44; Last Modified: 2019-04-05 14:55:58.
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