import math

n, k = [int(x) for x in input().split()]

prime = [2 * n] * n
idx_p = 0
for num in range(2, n + 1):
    is_prime = True
    sq = math.sqrt(num)
    for p in prime:
        if num % p == 0:
            is_prime = False
            break
        if p > sq:
            break
    if is_prime:
        prime[idx_p] = num
        idx_p += 1

cnt = [0] * (n + 1)
for p in prime:
    for i in range(p, n + 1, p):
        cnt[i] += 1
res = 0
for c in cnt:
    if c >= k:
        res += 1

print(res)