The book is now available! 11713771
(another Prime Pages' Curiosity)
Prime Curios!
Curios: Curios Search:
 

Participate:
Share/Bookmark
+ The prime whose reversal factors into the two extremal primes with only the four prime digits: 17731711 = 2357*7523. Note that the latter primes concatenate to another prime (23577523) that remains a prime when each digit is replaced by its complement (87533587). [Beedassy]

  To link to this page use http://primes.utm.edu/curios/page.php?number_id=8720



Prime Curios! © 1999-2013 (all rights reserved)