The book is now available! 13131...13131 (25-digits)
(just those submitted by Avrutin)
Prime Curios!
Curios: Curios Search:
 

Participate:
Share
                                                 13131 3131313131 3131313131

Just showing those entries submitted by 'Avrutin': (Click here to show all)

+ A prime formed by concatenating thirteen 13's and deleting the last digit. [Avrutin]




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