99999...00011 (4384-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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n^2+3*n+1 is prime, where n = 10^2192-5. [Amine]
Submitted: 2015-10-10 14:02:30; Last Modified: 2026-06-01 21:16:56.
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