If you want to examine if a integer is a prime number can you try with dividing it by
the prime numbers 2 , 3, 5 etc . What is the largest prime number that there is reason to try ?
Determine if any of the numbers 171, 203 , 211, 567 or 7669 is prime and factorize them otherwise.

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the number's square root is a cut off point

so from this you can see that 171 and 567 are not prime

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