2357
This number is a prime.
Single Curio View: (Seek other curios for this number)
Adding the prime digits (2, 3, 5, 7) either to all primes
with a prime number of distinct prime digits (23, 37, 53,
73, 257, 523) or to all nonprimes with a nonprime number of
distinct prime digits (2375, 2537, 2573, 2735, 3275, 3572,
3725, 3752, 5327, 5372, 5723, 5732, 7235, 7325, 7352, 7532
) forms a prime in each case (983 ; 76159) the reversal of
whose product is also prime (79246847). [Beedassy]
Submitted: 2009-09-11 11:03:03; Last Modified: 2009-09-11 16:00:03.
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell