The book is now available! 949
(another Prime Pages' Curiosity)
Prime Curios!
Curios: Curios Search:
 
Participate: 		+ The largest palindromic two-sided semiprime. [Gupta]

+ 949 is the only known multi-digit palindromic number m such that m*m! - prime(m) is prime. [Firoozbakht]

  To link to this page use http://primes.utm.edu/curios/page.php?number_id=3353


Prime Curios! © 1999-2009 (all rights reserved)