6711713

This number is a prime.

Prime string of five consecutive integers from 9 to 13 whereby the composite numbers are replaced by the sum of their prime factors {6}{7}{11}{7}{13}. Replacing the composites by the concatenation of these prime factors (counting multiplicity) yields yet another prime 33251122313 or {3*3}{2*5}{11}{2*2*3}{13}. [De Geest]