The book is now available! 84
(just those submitted by Russ)
Prime Curios!
Curios: Curios Search:


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

+ Its digits are composite. Yet each digit minus 1, the sum of the digit minus 1 and the absolute value of the difference of the digits minus 1 is prime. [Russo]

+ 84 is the smallest number that can be expressed as the sum of 3 distinct primes raised to distinct prime exponents (25 + 33 + 52). [Russ]

Prime Curios! © 2000-2018 (all rights reserved)  privacy statement