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The only prime number with four consecutive increasing digits. [De Geest] The smallest nontrivial straightline prime. [Pol] The only 4digit esthetic prime, i.e., a prime whose the difference between adjacent digits is 1. [Loungrides] 4567, 4^4 + 5^5 + 6^6 + 7^7 + 4567, 4^4 + 5^5 + 6^6 + 7^7 + 4567 + 4*5*6*7, and 4567 +/ 4*5*6*7 are all prime. [Bui Quang Tuan]
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