add to list (identifying whether input is a prime number)

Question

Trying to write a function 'prime_check(number)' to test if an argument is a prime number

The number_of_factors for a given number should only be 1 (the given number itself) and '1', which is already excluded in the while statement

Having trouble adding a variable to the list "set_of_factors" Tried to debug in Thonny, which says that set_of_factors = none

def prime_checker(number):

    set_of_factors=[]
    number_of_factors=len(set_of_factors)
    f=2

    while number > 1 and f<=number:
        if number%f == 0:
            set_of_factors.insert(0,1)
            f+=1            
        else:
            f+=1              
    if number_of_factors==1:
        print("It is a prime number")
    else:
        print("It is not a prime number")

n = int(input("Check this number: "))
prime_checker(number=n)

Answer 1

Prime numbers have two factors, one and itself. Ex. 5's factors would be (1, 5)

Also istead if ".insert" use ".append"

    def prime_checker(number):

    set_of_factors=[]
    number_of_factors=len(set_of_factors)
    f=2
    while number > 1 and f<=number:
        if number%f == 0:
            set_of_factors.insert(0)
            f+=1            
        else:
            f+=1              
    if number_of_factors==2:
        print("It is a prime number")
    else:
        print("It is not a prime number")