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The smallest 4digit prime n such that p1 = 2n+3, p2 = 4n+5, and p3 = 6n+7 are all prime. [Russo]
The smallest invertible prime whose concatenated pair form a strobogrammatic prime (11096011). The sequence begins 1109, 1699, 6689, 6691, 6991, .... The only emirp derived from a twodigit prime by inserting the sum of its digits inbetween. [Loungrides] In the ISO 860 date format the terrorist attack against New York on day "nine eleven" is written as 1109. [Petersson]
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