The book is now available! 277777788888989
(another Prime Pages' Curiosity)
Prime Curios!
Curios: Curios Search:
 

Participate:
Share
                                                            27777 7788888989
+ The smallest prime with a multiplicative persistence (i.e., the number of times the digit product must be iterated in order to reach a single-digit product) of 11: 277777788888989 --> 4996238671872 --> 438939648 --> 4478976 --> 338688 --> 27648 --> 2688 --> 768 --> 336 --> 54 --> 20 --> 0. [Beedassy]




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