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This number is a prime.
4122333 4444555556 6666677777 7788888888 9999999997
Single Curio View: (Seek other curios for this number)The only prime formed by inserting, between the digits of a double-digit number n, the concatenation in order of all the digits d, d times each of them, n=47. [Loungrides]
Submitted: 2018-04-25 11:33:09; Last Modified: 2018-05-26 07:48:57.
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