2357

This number is a prime.

Single Curio View:   (Seek other curios for this number)
The reverse concatenation of the two prime derangements (5273 and 7523) of 2357 is prime: 75235273. Note that sandwiching the latter between two blocks of prime 2357, followed by halving at the middle yields a new pair of primes (23577523 ; 52732357 ) both remaining prime when every digit is replaced by its respective complement (87533587 ; 58378753). [Beedassy]

Submitted: 2009-08-10 01:06:53;   Last Modified: 2009-08-10 01:58:48.
Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell