n, k = map(int, input().split())
count = [0] * (n + 1)
sieve = [True] * (n + 1)
sieve[0] = sieve[1] = False

for i in range(2, n + 1):
    if sieve[i]:
        # Mark all multiples of i starting from i
        for j in range(i, n + 1, i):
            count[j] += 1
        # Sieve out multiples of i starting from i*i
        for j in range(i * i, n + 1, i):
            sieve[j] = False

result = sum(1 for x in count[2:n+1] if x >= k)
print(result)