n,k=map(int,input().split())
d=[0]*(n+1)
for i in range(2,n+1):
  if d[i]==0:
    for j in range(i,n+1,i):
      d[j]+=1
ans=0
for i in range(2,n+1):
  if d[i]>=k:
    ans+=1
print(ans)