import math
def PrimeNum(a):
	x=math.sqrt(a)
	x=int(x)
	tmp=1
	if a==1:
		tmp=0
	elif a==2:
		tmp==1
	elif a>3 and a<9:
		for i in range(2,a):
			st=a%i
			if st==0:
				tmp=0
				break
	
	else:
		for i in range(2,x+1):
			st=a%i
			if st == 0:
				tmp=0
				break
	#print("::::",a,x,st,tmp)
		
	if tmp==1:print("・・")

	return tmp	
	
n=int(input())
p=[]
att=0
for i in range(n):
	p.append(int(input()))
	att+=PrimeNum(p[i])
	
print(att)

