The book is now available! 107
(just those submitted by Necula)
Prime Curios!
Curios: Curios Search:
 

Participate:
Share

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

+ Many Lucas numbers are not prime, but "Lucas" is (chemically) prime if we add the atomic numbers of Lu(tetium), Ca(lcium) and S(ulphur): 71 + 20 + 16 = 107. [Necula]

+ The sum of atomic numbers of five chemical elements that have their symbols embedded in the second author's last name (H,O,Na,K,Er). [Necula]




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