import math
M,N=map(int,input().split())
k=0
w=0
while M!=N+1:
i=round(math.sqrt(M))
for q in range (2,i+1):
if M%q==0:
k+=1
if k==0:
w+=1
print(M)
else:
k=0
M+=1
if w==0:
print("Absent")# your code goes here
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