2
This number is a prime.
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(2^2^2 + 1)^(2^2^2 + 1) - (2^2^2 + 1) - 1 is a 21 digit prime. [Luhn]
Submitted: 2002-04-19 11:11:59; Last Modified: 2008-01-30 17:28:00.
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