Yes they are most likely used in your everyday life- even if you don't realize it. Computers use prime numbers in the encryption techniques. If you log in to a website in secure mode, most likely prime numbers are being used, but you don't even know about it.
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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
Data encryption, used for personal identification numbers (PINs) and for secure communications over the internet are based on very large prime numbers.
Prime numbers and composite numbers are not used in daily jobs. However they are used by scientists to prove theorems.
Any situation numbers are used.
Counting your money would be one way.