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

dummy = 2 * n
prime = [dummy] * (n + 2)
sie = [dummy] * (n + 2)
prime[0] = 2
prime[1] = 3
for p in prime:
    for i in range(p, n + 1, p):
        sie[i] = p
idx_p = 2
for num in range(6, n + 1, 6):
    for snum in (num - 1, num + 1):
        if sie[snum] != dummy:
            continue
        for i in range(snum, n + 1, snum):
            sie[i] = snum
        prime[idx_p] = snum
        idx_p += 1

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

print(res)