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+ The 273rd prime minus sum of gaps between the first 273 consecutive primes minus one equals 273. [Fentsor]

+ The smallest of the only two sphenic numbers consisting of distinct prime digits. Note that its prime factors (3, 7, 13), concatenated in reverse order, is prime. [Loungrides]

(There is one curio for this number that has not yet been approved by an editor.)




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