Determine whether or not N is a composite number, where

NOTE:
A prime number (or a prime) is a natural number that has exactly two (distinct) natural number divisors, which are 1 and the prime number itself. A composite number is a positive integer which has a positive divisor other than one or itself. By definition, every integer greater than one is either a prime number or a composite number. The numbers 0 and 1 are considered to be neither prime nor composite.

(In reply to A first stab at the solution by e.g.)

From this we can see the last digit is a 1, since all powers of numbers ending in a 6 end in 6 and 6-6+6+6-1=11

I also tried writing this number in base 26:

25 25 25 0 0 0 0 0 0 0 0 1 0 25 25 25 25 25 25 25 25 25 25 25

Which doesn't seem helpful but I thought I'd share.

Posted by Jer on 2006-04-23 13:21:48