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# Which is the prime number out of this list 9 37 12

Which is the prime number out of this list 9 37 12 15 21 24 32 36 42

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37, only divisible by itself and 1

Posted on Oct 17, 2013

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The only prime number in the list is 37.

Posted on Oct 12, 2013

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Posted on Jan 02, 2017

"A prime number (or a prime) is a natural number greater than 1 that has no positive divisors other than 1 and itself." - wikipedia
A list would be impossible without a limit. if you can't divide it by anything but 1 and the number itself(which would also mean that you were dividing by one), then it's prime.
4 is not prime, because it is divisible by 1, 2, and 4. 5 is prime, because it cannot be divided by anything except 1 and 5(itself).

Posted on Nov 11, 2012

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## Related Questions:

### Examples of prime numbers?

Presume you know that prime number is divisible only by itself. See here:

http://primes.utm.edu/lists/small/1000.txt

Oct 13, 2014 | Computers & Internet

### List of prime numbers

There are an infinite number of prime numbers so a complete list is impossible. You can see the first 500 prime numbers at http://en.wikipedia.org/wiki/List_of_prime_numbers#The_first_500_prime_numbers

Jul 07, 2014 | Computers & Internet

### What criteria make a number a prime number?

It is any number only divisible by itself and 1 (giving whole number results). A list here of the first 1000

http://primes.utm.edu/lists/small/1000.txt

May 07, 2014 | Computers & Internet

### Prime numbers

There are an infinite number of prime numbers, so I can't list them all. For the first 500 prime numbers, see http://en.wikipedia.org/wiki/List_of_prime_numbers#The_first_500_prime_numbers

Apr 06, 2014 | Computers & Internet

### List prime numbers between 19 and 24

The only prime number between 19 and 24 is 23. If you include the bounds then 19 is also prime.

Feb 17, 2014 | Computers & Internet

### I cant understand prime numbers

A prime number is a positive whole number (natural number) which cannot be divided into smaller whole numbers. In short, it can only be divided (integer division) by itself and 1.
First prime number is 2, then 3, 5, 7, 11, 13, 17, 19,
To generate a list of prime numbers the Greek Eratoshenes used a method called now the sieve Eratosthenes.

1. Write all the natural numbers up to some chosen limit (100, 259, any limit )
2. Remove 1 by crossing it ( 1 is no longer considered prime).
3. The first prime number is 2. Circle the number 2.
4. Go through the whole list crossing out all the numbers that are multiple of 2, that is 4, 6, 8,10,12, ...
5. Repeat.
6. The next prime number is 3 since it was not crossed out as a multiple of 2. Circle 3.
7. Go through the whole list crossing all the numbers that are multiples of 3, and which have not already been crossed out as multiples of 2 .
8. Number 4 has been crossed out already.
9. Next prime number is 5. Circle 5
10. Go through the whole list crossing all the numbers that are multiple of 5 and which have not been crossed out already as multiples of 2, or 3
11. Repeat:
12. Next prime number is 7. Circle 7
13. Go through the whole list again, crossing out the multiples of 7, and so on.
If you want to test the primality of a positive integer (odd number) starting by dividing it by 3 (use divisibility rules or otherwise), then divide by 5, by seven, and all subsequent prime numbers. If it is not divisible by any prime number, keep going but do not exceed the prime number that is closest yet smaller than square root of your number.

Enjoy.

Nov 26, 2013 | Office Equipment & Supplies

### List prime numbers

There are an infinite number of primes. They won't all fit into a single reply.

Oct 25, 2013 | Office Equipment & Supplies

### I dont know what all the prime numbers are

"A prime number (or a prime) is a natural number greater than 1 that has no positive divisors other than 1 and itself." - wikipedia
A list would be impossible without a limit. if you can't divide it by anything but 1 and the number itself(which would also mean that you were dividing by one), then it's prime.
4 is not prime, because it is divisible by 1, 2, and 4. 5 is prime, because it cannot be divided by anything except 1 and 5(itself).

Nov 08, 2012 | Computers & Internet

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