Prime Real Estate

Normal Sudoku rules apply. Numbers in cages sum to the number in the top left corner of the cage. There are 20 prime numbers from 13 to 97. There are 19 DIFFERENT 2-digit prime numbers in the grid, inside the pills, reading from left to right. The one prime, from 13 to 97, that does not have a pill is VERTICAL in the grid, and read from top to bottom. Find the vertical prime that was left out of the set of 20.