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The number of days between the previous terrorist attack on the Twin Towers and 9/11. Note the appearance of 911 in the reversal of 3119. The smallest prime factor of the 43digit number of terms required to obtain a sum of 100 in the harmonic series. The only nontitanic prime of form n^n6, where n is an integer, (case n=5) [Loungrides] The smallest righttruncatable prime concatenated from two doubledigit primes. [Loungrides]
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