61199...96119 (1004-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 prime formed from the reverse concatenation of the first n invertible primes, i.e., {611999, 611969, ..., 109, 61, 19}, (case n=187). [Bajpai]

Submitted: 2019-06-03 00:56:52; Last Modified: 2020-06-18 15:10:58.