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88 + 91^{n} is prime for n = 1 to 6. [Blanchette] Palindromic strobogrammatic sum of the first Cunningham chain of the first kind (2, 5, 11, 23, 47). [Rock] The following quotation about primes contains 88 letters: "The obvious mathematical breakthrough would be development of an easy way to factor large prime numbers."  Bill Gates (1955 ). [Post] The sum of the first 88 emirps is 88 thousand. [Gaydos]
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