 # Prime Numbers

## A prime number is a number that has exactly two factors: 1 and itself. All whole numbers greater than 1 are either prime numbers or can be written as the product of prime numbers. There are an infinite number of prime numbers, but they occur less frequently among larger numbers. Prime numbers are important in cryptography and number theory.

###### 45,581 Questions
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# Are there any even prime numbers other than two?

No. Any other even number other than 2 will be divisible by 2. So, the only even prime number is 2.

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# The square of certain number exceeds 24 by 5 times the numberwhat is the number?

x2-5x-24=0 (x+3)(x-8)=0 x=8,-3 putting the value 64-40-24=0 64-64=0
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# What is the largest four digit number whose cube root is a prime number?

6859. Cube root of 9999 is 21.54, so find the largest prime number less than that (19), then cube that number.

19^3=6,859

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# Find the prime factors or state the number is prime 899?

12

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# Write prime numbers less than 20?

The prime numbers less than 20 are 2, 3, 5, 7, 11, 13, 17, and 19.

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# Prime numbers up to 200?

2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67 71 73 79 83 89 97 101 103 107 109 113 127 131 137 139 149 151 157 163 167 173 179 181 191 193 197 199

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# What is the biggest prime number known up to date?

257,885,161 -1 as of 2013. New primes are being calculated all the time, so this will change as new and larger ones are discovered. Also, note that there are infinitely many primes (proved by Euclid around 300 BCE), so there won't ever be a single "highest" prime, only the highest one known.

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# Is 241 a prime number?

Yes 241 is a prime number because it is only divisible by 1 and itself.

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# Is it true that if you add 2 prime numbers you always get an even number?

As long as one of the numbers isn't 2, adding any two prime numbers results in an even number. Why? 1.) Adding any two odd numbers gives an even number, 2.) adding an odd and an even gives an odd, and 3.) all primes are odd, except for 2.

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# What numbers go into 97?

1 and 97 only, so 97 is a prime number.

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1514 = 2*757

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# What is the highest 2 digit prime number?

The highest two digit prime number is 97.

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# How are prime numbers useful in life?

In computers "The RSA algorithm involves three steps: key generation, encryption and decryption"

Used to keep data secret from other people. I'm not an expert but I think your bank login use it ect.

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# What are first 12 prime numbers?

2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37

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# What are the next 10 prime numbers after 47?

The next ten primes after 47 are 53, 59, 61, 67, 71, 73, 79, 83, 89 and 97

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3 and 41

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# Why is 111 not a prime number?

Because in addition to '1' and itself, it's also divisible by 3 and 37.

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# What numbers are prime numbers in the 90's?

There is only one: 97.

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# How do you write 79 in Spanish?

setenta nueve

setenta = 70

nueve = 9

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# What is the smallest positive integer whose prime factorization consists of 8 different prime numbers?

This would be whatever number is 2 X 3 X 5 X 7 X 11 X 13 X 17 X 19, which is 9699690.

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19.

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# What is the sum of the first 6 prime numbers?

2+3+5+7+11+13=41.

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# Why is 36 not a prime number?

36 is divisible by more than itself and 1. It can be divided by 2, 3, 4, 6, 12, 18.

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# What are the factors and prime factors of 741?

The factors are: 1, 3, 13, 19, 39, 57, 247, 741

The prime factorisation is 3 x 13 x 19

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