The book is now available! 78910111213
(another Prime Pages' Curiosity)
Prime Curios!
Curios: Curios Search:

                                                                7 8910111213
+ The concatenation of seven consecutive integers starting from seven forms a prime (78910111213). Exactly seven distinct digits are used and the digital root of the prime is seven. [De Geest]

Prime Curios! © 2000-2018 (all rights reserved)  privacy statement