This number is a prime.

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

+ 193 is the smallest prime p where p^(digit-sum of p) terminates in the digits of p and the last digit of p is the digit-length of p. [Worrom]

(There is one curio for this number that has not yet been approved by an editor.)

Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell