44444...74659 (500-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 500-digit prime that produces a titanic 1000-digit prime after each digit of the former is squared. [Rivera]

Submitted: 2020-06-13 22:57:41; Last Modified: 2020-06-13 23:00:09.