297
(another Prime Pages' Curiosity)
Prime Curios!
Curios: Curios Search:
 
Participate: 		+ Twenty-nine 7's followed by seven 29's as well as seven 29's followed by twenty-nine 7's are both primes of length 7+29+7. [De Geest]

+ 2*297 + 9*297 + 7*297 + 1 is prime. [Patterson]

+ Twenty-nine 29's followed by seven 7's is prime. [De Geest]



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