Prime Numbers with a gap of 2 between them.Įratosthenes Method Of Finding Prime Numbers: Prime Numbers ChartĮratosthenes was a Greek Mathematician from the 3rd century BC who devised a method to find the Prime nos. Numbers having only 1 as their common factor or HCF = 1. So, we have tabulated the types below: Even Prime Numbers Often students have difficulty in finding the types of prime numbers. All the even positive integers >2 can be expressed as a sum of 2 prime numbers ( 4 = 2+2 or 8 = 5+3).
Coprime or relatively prime or mutually prime numbers are the ones that have 1 as HCF. Any number >1 can be divided by at least one Prime Number. Therefore, 2 is the only even number that is prime. From the above table, you can see that all prime numbers except 2 are odd. Some properties through which you can decide whether a number is prime or not are listed below:
Quick Tip: 1 is not a prime number as it has only 1 factor. The most searched query regarding prime numbers is the list of prime numbers between 1 to 1000. You can also play it as a competition with your friends and once done you can check the answers from the table in the next section. So from the above table, we can devise another definition of Prime Numbers – “ Numbers having exactly 2 factors are known as Prime Numbers“.įun Exercise For You: Try to find the list of Prime Numbers between 1 to 50. Going by the easiest and most effective definition, prime numbers can be defined as the “Numbers which are divisible by 1 and the number itself”. Learn Factorisation Formulas From Here What Is A Prime Number?
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