from collections import *
import sys

sys.setrecursionlimit(10 ** 6)
int1 = lambda x: int(x) - 1
p2D = lambda x: print(*x, sep="\n")
def MI(): return map(int, sys.stdin.readline().split())
def MF(): return map(float, sys.stdin.readline().split())
def LI(): return list(map(int, sys.stdin.readline().split()))
def LF(): return list(map(float, sys.stdin.readline().split()))
def LLI(rows_number): return [LI() for _ in range(rows_number)]

def main():
    n,k=MI()
    aa=[0]*(n+1)
    for i in range(2,n+1):
        if aa[i]==0:
            aa[i]=1
            for j in range(i*2,n+1,i):
                aa[j]+=1
    #print(aa)
    ans=0
    for a in aa[2:]:
        if a>=k:ans+=1
    print(ans)

main()