def solve(N, K):
    ps = [0] * (N + 1)
    for i in range(2, N + 1):
        if ps[i]:
            continue
        for j in range(i, N + 1, i):
            ps[j] += 1

    count = 0
    for pi in ps[2:]:
        if pi >= K:
            count += 1
    return count

N, K = map(int, input().split())
print(solve(N, K))