The book is now available! 897
(just those submitted by Siegenthalers)
Prime Curios!
Curios: Curios Search:
 

Participate:
Share

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

+ The only sphenic number with prime factors of the form (p)(p+10)(p+20). [Siegenthalers]




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