N, K = map(int, raw_input().strip().split())
npf = [0] * (N+1)
for i in xrange(2, N+1):
    if npf[i] == 0:
        for j in xrange(i, N+1, i):
            npf[j] += 1
ans = 0
for i in xrange(2, N+1):
    if npf[i] >= K:
        ans += 1
print(ans)