cryptography
factor tree
There are few real-life uses for prime numbers. Nevertheless, they do have a useful purpose in some cases. For instance:Circada's only come out at time periods of 13 or 17. These are prime, and mean that a predator coming out at another value (say 4 or 6) will be less likely to catch them.Prime numbers are used to contact aliens. They are a simple but universal phenomenon that will indicate our intelligence.Prime numbers are used in encryption. It is much harder to crack a code with a big number that is the product of two large prime numbers than one which has lots of factors.
Prime numbers are used to encrypt credit cards and identify them.
we have 7 days in a week. 7 is a prime number. there are 31 days in some months.31 is a prime number
Any situation numbers are used.
Prime numbers only have two factors, one and the number itself.
When used as in "prime number" or "prime factor", it means that the number has exactly 2 factors. For example: 17 has only the factors 1 and 17, so it is prime. 14 has the factors 1, 2, 7, and 14, so it is not prime. When used as in "relatively prime", it means that two or more numbers do not have any common factors other than 1. For example: 3 and 4 do not have any common factors other than 1, so they are relatively prime. 6 and 10 have 1 and 2 as common factors, so they are not relatively prime.
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 product of the prime factors of composite numbers.
none that I know of... except maybe cycling your brain to stay awake whilst driving.
cryptography
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
Proportions are used in real life to determine prices of things.
Number factors help find common denominators in fractions and reducing fractions. In algebra they are used to find the answers to higher level equations like quadratics.
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
i know this is a bad answer but really, no where. my father said when he was young he learned it and never EVER used it once in his whole life.