72180...10631 (6560-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 titanic probable prime formed from reverse concatenation of the first n triangular numbers (case n = 1201). [Gupta]

Submitted: 2022-02-18 02:55:38; Last Modified: 2022-02-18 03:08:28.