97

This number is a prime.

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The Kryptos Sculpture was unveiled on the grounds of the CIA complex in Langley, Virginia. It was built by American artist Jim Stanborn and contains four encrypted messages. Three of the messages have been solved but the fourth, which is 97 letters long, is still waiting to be deciphered. [Homewood]

Submitted: 2019-08-01 13:41:29; Last Modified: 2020-08-16 16:52:09.