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The number 3467 and its reversal are the only fourdigit lefttruncatable emirps with lefttruncatable reversal. [Punches]
The smallest emirp containing all distinct digits n for which n!1 is a factorial prime. [Loungrides] The smaller term in the only existing pair of 4digit lefttruncatable emirps, (3467, 7643). [Loungrides] The smallest distinctdigit 4digit emirp whose the complementary digits create its emirp, i.e., 7643. Is there another such prime? [Loungrides]
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