Is 1147 a prime number?
by how many numbers do you need to divide 1147 so that you can find out​

Step-by-step explanation:

This is a super question to know the answer to.

Step One

Find the square root of 1147

The √1147 = 34          

So you have to check the primes up to 34

2 3 5 7 11 13 17 19 23 29 31 The other odd numbers up to 34 have already been checked.

You have 11 primes, but some of them can be eliminated without do any division.

2 is even. 1147 is not. So 2 is not a factor

3 1147 adds to 13. 13 is  not divisible by 3. Neither is 1147

5 1147 does not end in 0 or 5. 5 is not a factor

7 is not a factor. There is a fraction left over when 1147 is divided by 7

1147 cannot be evenly divided by 11 because 47 is not divisible by 11.

1147 / 13 = 88. something. Not divisible by 13

1147 / 17 = 67 and a remainder. 1147 is not divisible by 17

1147 / 19 = 60 and a remainder. 1147 is not divisible by 19

1147 / 23 = 49 and a remainder. 23 is not a factor of 1147

1147 / 29 = There's a remainder here. 29 is not a factor

1147/31 =   This is an even division. You get 37 another prime

1147 is not prime

1147 = 31 * 37     After all that work ...

answer: the answer is 23

step-by-step explanation: