SOLUTION: I've been taught that an irrational number is a number where the decimal neither terminates or repeats. Is there a standard for how many decimals should be looked at before it is

Question 398214: I've been taught that an irrational number is a number where the decimal neither terminates or repeats. Is there a standard for how many decimals should be looked at before it is deemed irrational? Or, is there a rule I can follow to more easily figure that out?
Thanks in advance for your help.
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
I don't know of a standard.
Some numbers, such as pi, are thought to be irrational and have been checked to 2 million digits (maybe more), but there's no proof that it won't start to repeat at some point.
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What is it you want to figure out?
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I checked on google, found this:
The record for the number of digits of pi calculated is held by a 55-year-old Japanese programmer. A program writte by Shieguru Kondo calculated 5 trillion digits of pi, taking 90 days.
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