65

This number is a composite.

Just showing those entries submitted by 'Gupta': (Click here to show all)

+ 65 is the ONLY number which gives a prime square, on adding as well as subtracting its reverse from it (65 + 56 = 112, 65 - 56 = 32). [Gupta]

Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell