This number is a composite.
Single Curio View: (Seek other curios for this number)72 is the only number of the form pq * qp that lies between a twin prime pair, where p and q are distinct primes. [Kulsha]
Submitted: 2000-10-28 10:48:41; Last Modified: 2009-04-20 18:37:58.
Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell