Prime Sum Godoku

Here's an easier version of the nine-by-nine prime sum Sudoku puzzle from last time.  Because the numbers one through five only contain two numbers which aren't prime, and their sum happens to be prime, a lot of information is given when a zero appears.

Let's go over the rules again, even though they match that of our last puzzle.  When two cells are in the same cage there is a circle between them if and only if their sum is prime.  The number in that circle reveals how many of those two numbers are primes themselves.  

These are really short and very easy once you grasp the rules.  Hopefully they might entice some people to try the larger 9x9 Sudoku version.

PDF Version

Solution