Now let us look at how difficult or easy it is do testing. When "n" is equal to 100 almost what really we see is about something like 2100. If you have to test the things almost assuming that our system can process as many as 1010 computations per second, which is very large in present standards, it almost takes to test this small loop about 4 x 1012 years. So, if we can test system a small loop like this requires about 1012 years of time.

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