import sys; input = sys.stdin.buffer.readline
sys.setrecursionlimit(10**7)
from collections import defaultdict
con = 10 ** 9 + 7; INF = float("inf")

def getlist():
	return list(map(int, input().split()))

num = 2 * 10 ** 6 + 1 
L = [1 for i in range(num)]; L[0] = 0; L[1] = 0
anslist = [0 for i in range(num)]
plist = []
for i in range(num):
	if L[i] == 1:
		plist.append(i)
		anslist[i] += 1
		c = 2
		while i * c <= num - 1:
			L[i * c] = 0
			anslist[i * c] += 1
			c += 1


#処理内容
def main():
	N, K = getlist()
	ans = 0
	for i in range(2, N + 1):
		if anslist[i] >= K:
			ans += 1

	print(ans)


if __name__ == '__main__':
	main()