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The smallest fourdigit emirp with distinct digits. [Capelle] The mouth of a prime volcano (truncated pyramid). 1069 310693 33106933 3331069333 333310693333[Post] 1069 = 1 + 1*3 + 1*3*5 + 1*3*5*7 + 1*3*5*7*9. [Silva] The first "double" super2 emirp, i.e., an emirp p such that 2*p^2 contains twice 2 consecutive 2's in its decimal representation (2*p^2=2285522). [Loungrides] The smallest emirp that is a concatenation of three distinct brilliant numbers (10, 6, 9). [Loungrides] The smallest fourdigit prime requiring seven steps to reach its fixed point under Kaprekar's process. [Honaker]
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