The book is now available! 419
(just those submitted by Carmichael)
Prime Curios!
Curios: Curios Search:
 

Participate:
Share

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

+ 419 is a Sophie Germain prime, since 2 * 419 + 1 = 839, which is prime. Note that it is the 22nd Sophie Germain prime, and 22 = 2 * 11 is the product of two Sophie Germain primes. [Carmichael]




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