>>9740757Are you asking how you can check 217 can't be written as ?
Just computationally calculate the results of all combinations of , and ,
with in the range of 0 to 5, in the range of 0 to 2, and in the range of all primes to 211.
Then you will see 217 is not in these results.
If you're asking how I know for sure 217 is the ONLY answer, then I will admit I don't know that for certain.
I can only check up to a certain of course. But there doesn't appear to be any other number.
If you could prove me wrong by finding a different number that would be great. :)
