
    Given a target quiz score threshold, determine how many distinct exceptional performance levels exist below this threshold, where an exceptional level occurs at prime-numbered scores. This information will help establish grading benchmarks and identify critical intervention points for academic support.
    

    
def count_Primes_nums(n):
    """
    Given a target quiz score threshold, determine how many distinct exceptional performance levels exist below this threshold, where an exceptional level occurs at prime-numbered scores. This information will help establish grading benchmarks and identify critical intervention points for academic support.
    

    """
def count_Primes_nums(n):
    """
    Given a target quiz score threshold, determine how many distinct exceptional performance levels exist below this threshold, where an exceptional level occurs at prime-numbered scores. This information will help establish grading benchmarks and identify critical intervention points for academic support.
    

    """
    ctr = 0
    for num in range(n):
        if num <= 1:
            continue
        for i in range(2, num):
            if num % i == 0:
                break
        else:
            ctr += 1
    return ctr