def max_length(list1):
    
    max_length = max(len(x) for x in  list1 )  
    max_list = max((x) for x in   list1)
    return(max_length, max_list)
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