#coding=UTF-8
#とりあえずやってみるか

mojir=input()
hyo=mojir.split(" ")
N=int(hyo[0])
K=int(hyo[1])

ans=0
furui=list(range(0,N+1,1))
for idx in range(0,N+1,1):
    furui[idx]=0

furui[0]=-1
furui[1]=-1

for idx in range(2,N+1,1):
    if furui[idx]==0:
        for idy in range(idx,N+1,idx):
            furui[idy]=furui[idy]+1

    if furui[idx]>=K:
        ans=ans+1

print(ans)