Question 476631: weather 287,1369 and 2511 are primes or not?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! wheather 287,1369 and 2511 are primes or not?
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Example
sqrt(2511) = 50.11..
So you only need to check division of
2511 by primes that are less than 50
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Those primes are 47,43,41,37,31,...etc
I tried those and found 2511 = 31*81
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So 2511 is not prime.
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Cheers,
Stan H.
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