
m=int(input())
n=int(input())
total=0
min=0
for i in range(m, n+1):
cnt=0
if i==1:
continue
for j in range(2, i):
if i%j==0:
cnt+=1
if cnt==0:
total+=i
if min==0:
min=i
if total!=0:
print(total)
print(min)
else:
print(-1)