prime numbers are invented by srinivasan ramanujan, an Indian mathematician.
One method for finding prime numbers is called the "Sieve of Eratosthenes" because it basically "sifts" through the numbers looking for numbers that are not not prime.
Y. Motohashi has written: 'Sieve Methods and Prime Number Theory (Lectures on Mathematics and Physics Mathematics)' 'Lectures on sieve methods and prime number theory' -- subject(s): Numbers, Prime, Prime Numbers, Sieves (Mathematics)
The Sieve did not invent prime numbers. It was used to find them.
11 is prime; 21 is not. To see whenever a number is prime or not, think if a number can be multiplied by another number to get that number. Or just look at a Sieve of Eratosthenes, if you're not a "thinky" person. :)
The Sieve of Erastosthenes shows prime numbers.
prime numbers
The sieve of Eratosthenes is a simple, ancient algorithm for finding all prime numbers up to any given limit.
Eratosthenes' method of finding prime and composite number is called 'The Sieve of Eratosthene'.
It was around 200 BC.
One
Nobody invented them - they are a characteristic of the set of numbers.