19882...93317 (1318-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 p such that p-1 is a square and p-2 is a triangular number. There are only 11 such non-titanic primes. [Gudipati]

Submitted: 2026-04-22 03:16:17; Last Modified: 2026-04-22 10:59:21.

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