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The prime 769 equals
sqrt(590593+sqrt(590593sqrt(590593+sqrt(590593...)))).Note 590593 is a prime. [Caldwell] prime(769) = prime(7)*prime(6)*prime(9) + phi(769). The prime 769 is the only known number (up to 2*10^9) with this property. [Firoozbakht] The smaller of only two 3digit primes p, (emirp), such that p^2 is a concatenation of three doubledigit primes, i.e., 591361 = 769^2. The other such prime is 823. [Loungrides]
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