The book is now available! 809
(just those submitted by Andersen)
Prime Curios!
Curios: Curios Search:
 

Participate:
Share

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

+ 809 is the start of 21 consecutive primes which alternate between the forms 6n - 1 and 6n + 1. The smallest start of 22 such primes is the much larger 3954889. [Andersen]




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