The book is now available! 20261
(just those submitted by Kilpatrick)
Prime Curios!
Curios: Curios Search:
 

Participate:
Share

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

+ The smallest five-digit prime ABCDE for which the all of the following are also prime: ABCD + E; ABC + DE; AB + CDE; A + BCDE; AB + CD + E; A + B + C + D + E. [Kilpatrick]




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