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                                                                3 3251122313
+ Prime string of five consecutive integers from 9 to 13 whereby the composite numbers are replaced by the concatenation of their prime factors (counting multiplicity) {3*3}{2*5}{11}{2*2*3}{13}. Replacing the composites by the sum of these prime factors yields yet another prime 6711713 or {6}{7}{11}{7}{13}. [De Geest]

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