The book is now available! 91013...12547 (53-digits)
(another Prime Pages' Curiosity)
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                  910 1323910159 1129103110 1419121037 2116114112 4315112547
+ Prime string of consecutive integers from 20 to 47 whereby the composite numbers are replaced by the sum of their prime factors {9}{10}...{25}{47}. Replacing the composites by the concatenation of these prime factors (counting multiplicity) yields yet another prime of length 80 or {2*2*5}{3*7}...{2*23}{47}. [De Geest]

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