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7507 (another Prime Pages' Curiosity) |
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Single Curio View: (Seek other curios for this number) The difference of the numbers formed by descending concatenation of the composite digits and the ascending concatenation of the prime digits: 9864-2357. [Silva]
Submitted: 2009-05-09 20:58:47; Last Modified: 2009-05-09 22:21:38.
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