ABA12A  Help Balaji!
Balaji was reading number theory. When reading about primes, he was thinking about numbers which could be expressed as a product of primes. He wanted to know the largest number in a range which could be expressed as a product of primes. Balaji’s maths teacher is not so good at maths and so he was taught that 1 is prime. You, being a good programmer, help him with the task.
Input
The first line of input consists of C, the number of test cases, followed by C lines containing two space separated numbers a and b, the first and last number in the range (inclusive).
1 < C < 100
0 < A < B < 1e12
0 < B  A < 1e6
Output
For each test case, print a single line containing the largest number which can be represented as a product of primes, considering 1 to be prime.
Example
Input: 1
1 4 Output: 4
Explanation of test case: 4 can be expressed as 2 x 2.
hide comments
sharif ullah:
20161026 18:44:51
সবাই মজা নেয় (Everyone make fun with me!) 

Anubhav Balodhi :
20141111 18:11:36
the easiest question ever... 

Samil Vargas:
20131218 01:21:53
Man this is the easiest problem in the history but understand this is for freak people i could say that im one of those cause this problem is so easy just got to use long long int if you have time limit you are doing wrong 

Bahrul Halimi:
20120507 15:01:13
i got WA.. :(


arc:
20120507 14:57:49
此题看不懂 

:D:
20120503 16:01:54
Barely a tutorial problem. On top of that the wording seems to suggest you are looking for a number that can be expressed as product of exactly two primes, witch is not the case. You only need to remember to use 64bit integers. 

manish sharma:
20120406 16:00:30
the answer should be B only .... i don't know y it's giving me wrong answer 

magicsquare:
20120316 14:01:42
Definitely tutorial :D 

shivamrana:
20120315 13:21:42
Aviral ans is b only... ;)


theycallhimavi:
20120315 09:00:02
certainly B except zero should be the answer but it is not.. :/ 
Added by:  Kashyap Krishnakumar 
Date:  20120110 
Time limit:  0.219s 
Source limit:  50000B 
Memory limit:  1536MB 
Cluster:  Cube (Intel G860) 
Languages:  All except: ASM64 
Resource:  Own problem 