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Q: What are large prime numbers used for?

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Data encryption, used for personal identification numbers (PINs) and for secure communications over the internet are based on very large prime numbers.

Data encryption, used for personal identification numbers (PINs) and for secure communications over the internet are based on very large prime numbers.

Prime numbers are used to find the LCM of numbers Prime numbers are used to find the HCF of numbers Prime numbers are used to simplify fractions Prime numbers are used to find the LCD of fractions

There is no formula that will specifically give you a prime number and no non-prime number. Therefore, several large numbers are tested to see if they are primes, until a prime number is found.

Usually, but not necessarily and not if they're prime. All prime numbers have the same number of factors.

Large prime numbers are used in encryption. The larger the primes, the better the encryption. Typically each of two people will provide a prime; you need to know both prime numbers to decrypt. A program is used to calculate the values to be sent. The message is sent along with the product of the primes (sender's prime * receiver's prime). Since the number will be large it is difficult to crack (again, larger the better). To decrypt you have to know both prime numbers. Knowing one and the product makes it easy (just divide). If you only have the product, decrypting can be very time-consuming as you are forced to find the factors of the number

Prime numbers are used to find the product of the prime factors of composite numbers.

This question is based on a misunderstanding. Most cryptography is based on numbers that are products of two very large prime numbers. Being the product of two primes means that these numbers are composite - not prime!

Prime95 is a Windows application that helps you find Mersenne Prime Numbers, which are very large prime numbers. It is used my many to test the stability of their computers and make sure there are no errors present.

91,97 are the two large prime numbers below 100.

The same way as with smaller numbers, it may take longer. Just keep dividing by prime numbers until all the factors are prime.

Actually it is composite numbers that are used - products of two very large primes.

The same way as with smaller numbers, it may take longer. Just keep dividing by prime numbers until all the factors are prime.

Prime numbers and composite numbers are not used in daily jobs. However they are used by scientists to prove theorems.

Actually both are important. Public encryption is based on the product (and so a composite) of two very large prime numbers.

Prime numbers are used in encryption of financial transactions.

Let p = any prime number. (2p -1) is called a Mersenne number. Any such number that is prime is called a Mersenne Prime. Father Mersenne wrote a list of numbers of this type which he thought were prime, but a few were not. In fact, most of the large Mersenne numbers are not prime, but all the really large numbers that have been proved to be prime are Mersenne Primes.

Most of the time, but large prime numbers still have only two factors.

Not a lot. They're both prime numbers. A factor that is prime is used to make other numbers.

M. N. Huxley has written: 'The distribution of prime numbers: large sieves and zero-density theorems' -- subject(s): Numbers, Prime, Prime Numbers

2 is the smallest prime number. Numbers can't have factors larger than themselves. Zero and one aren't large enough to have prime factors.

In part because the problem of finding large prime numbers isn't exactly trivial.

1 Prime numbers have only 2 factors which are themselves and one 2 Prime numbers can't be composite numbers which have more than 2 factors 3 Prime numbers are odd except for two which is the only even prime number 4 Prime numbers are used in finding the LCM of 2 or more numbers 5 Prime numbers are used in finding the HCF of 2 or more numbers 6 Prime numbers are used in finding the LCD of fractions 7 Prime numbers are used in reducing fraction to their lowest terms 8 Prime numbers are rational because they can be expressed as fractions 9 Prime numbers are infinite 10 Prime numbers are irrational when square rooted 11 Prime numbers can't be 0 or 1 which are also not composite numbers 12 Prime numbers don't follow a forecasted numerical pattern 13 Prime numbers make up 25% of the first 100 integers or whole numbers 14 Prime numbers have a code amongst themselves that has never been cracked

Prime numbers are used to encrypt credit cards and identify them.

Large primes numbers are used in public key encryption systems as when multiplied together to create an even larger composite number it is extremely difficult to factorise this number into its component primes - this is what gives the encryption its strength. It is the knowledge of the large prime factors of the even larger composite number which allows the encryption and decryption keys to be determined; they are dependent on each other and the prime factors.