The book is now available! 491
(just those submitted by Carmichael)
Prime Curios!
Curios: Curios Search:


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

+ 491 is a Sophie Germain prime. 491 is also a divisor of a Generalized Fermat Number, as 491 * (2^123281+1) divides GF(123280,10) = 10^(2^123280) + 1. [Carmichael]

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