The book is now available! 31316...91489 (48-digits)
(another Prime Pages' Curiosity)
Prime Curios!
Curios: Curios Search:

                        31316913 8727147145 2100449741 4685822072 9781791489
+ This number constitutes the home prime of 80, the largest known home prime for any two-digit composite integer and is achieved in 31 steps using the repeated factoring and concatenation procedure. [Schiffman]

Prime Curios! © 2000-2017 (all rights reserved)