PNG or Jpeg's are not showing up in the instructions.

I just ran through and the answer is 25,743,6857. Something is likely wrong with your code if you are getting 739 instead of 743. You total is correct as well as the number of primes so maybe you are not setting highest prime number somewhere.

Which language? I'm not certain but the solutions may vary by language. Javascript has completely different tests in 3 and 6 place.

Tested and appears to be working correctly. Post the input line and your result for further response.

If you are using javascript just put in
console.log(text);
at the beginning of the program.

You have to fill each queue as it empties. In this case the queue that runs 97 is 37, 3, 8, 49. You cannot mix and match to produce a more efficient queue, that is not the goal of this challenge.