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The smallest prime p such that p^{2} + p + 4 is a palindrome. [Russo]
2551 = (2*5*5*1)^0 + (2*5*5*1)^1 + (2*5*5*1)^2. [Rooholamini] The only prime, less than a googol, that is reverse concatenation of n first powers of 5 (n=3). [Loungrides]
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