
Curios:
Curios Search:
Participate: 
The smallest compositedigit prime whose prime factors of its digits form another prime when they are concatenated lefttoright. [Honaker] The greatest prime factor of any sevendigit repdigit. [La Haye] 4649 is formed from two consecutive semiprimes (46 and 49); each of them formed from semiprime digits. [Silva]
(There are 2 curios for this number that have not yet been approved by an editor.)
Prime Curios! © 20002018 (all rights
reserved)
