The book is now available! 221
(just those submitted by Rupinski)
Prime Curios!
Curios: Curios Search:
 

Participate:
Share

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

+ 2*3*5*7+11=13*17. Note the consecutive use of the first 7 primes. [Rupinski]




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