Show that 571 is a prime number, Mathematics

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Show that 571 is a prime number.

Ans: Let x=571⇒√x=√571

Now 571 lies between the perfect squares of (23)2 and (24)2

Prime numbers less than 24 are 2,3,5,7,11,13,17,19,23

Since 571 is not divisible by any of the above numbers

571 is a prime number

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