
    Given the total number of potential bus stops in a metropolitan transit network, determine how many critical junction points exist by calculating the number of prime-numbered stops less than the total count, as these junctions require special scheduling consideration. These junction points follow a mathematical pattern where their stop numbers are prime, making them essential transfer hubs that cannot be broken down into smaller route segments. Each prime-numbered junction serves as a vital connection point that directly impacts the efficiency of the entire bus network.
    

    
def count_Primes_nums(n):
    """
    Given the total number of potential bus stops in a metropolitan transit network, determine how many critical junction points exist by calculating the number of prime-numbered stops less than the total count, as these junctions require special scheduling consideration. These junction points follow a mathematical pattern where their stop numbers are prime, making them essential transfer hubs that cannot be broken down into smaller route segments. Each prime-numbered junction serves as a vital connection point that directly impacts the efficiency of the entire bus network.
    

    """
def count_Primes_nums(n):
    """
    Given the total number of potential bus stops in a metropolitan transit network, determine how many critical junction points exist by calculating the number of prime-numbered stops less than the total count, as these junctions require special scheduling consideration. These junction points follow a mathematical pattern where their stop numbers are prime, making them essential transfer hubs that cannot be broken down into smaller route segments. Each prime-numbered junction serves as a vital connection point that directly impacts the efficiency of the entire bus network.
    

    """
    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