N, K = map(int, input().split())
sieve = [0] * (N + 1)
for i in range(2, N + 1):
    if sieve[i] == 0:
        for j in range(i, N + 1, i):
            sieve[j] += 1
ans = 0
for i in range(2, N + 1):
    if sieve[i] >= K:
        ans += 1
print(ans)