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To confirm the fact that 11887 is prime, one needs to check if it is divisible by each of 2, 3, 5, 7,.... What should be the four greatest primes in this list?

 Jul 6, 2021
 #1
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To confirm the fact that 11887 is prime, one needs to check if it is divisible by each of 2, 3, 5, 7,....

What should be the four greatest primes in this list?  

 

You don't need to check any numbers greater than its square root. The square root of 11887 is 109.027+. 

 

Since 109 is prime, that would be the largest number.  The next largest primes are 107, 103, & 101.  

 Jul 6, 2021
 #2
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THANKS!

Guest Jul 6, 2021

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