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This number is a prime.
21111 1111111111 1111111113
Single Curio View: (Seek other curios for this number)Inserting twenty three 1's between the digits of the prime 23 we find another prime whose the product and the sum of digits are consecutive perfect numbers. [Loungrides]
Submitted: 2010-02-16 03:58:19; Last Modified: 2010-02-17 20:37:04.
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