The book is now available! 627626947
(just those submitted by Opao)
Prime Curios!
Curios: Curios Search:
 

Participate:
Share

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

+ The largest nine-digit left-truncatable prime such that when two of its digits are interchanged, the resulting number is also a left-truncatable prime. Can you locate the two digits in question? [Opao]




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