def position_max(list1):
    
    max_val = max(list1)
    max_result = [i for i, j in enumerate(list1) if j == max_val]
    return max_result
def is_not_prime(n):
    import math
    
    result = False
    for i in range(2,int(math.sqrt(n)) + 1):
        if n % i == 0:
            result = True
    return result