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547
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can anybody find a pattern of a prime number? cause I think I can! I already made a equation about it

 Feb 27, 2015

Best Answer 

 #2
avatar+130516 
+5

Unfortunately....we don't have a general "equation" that will always produce a prime number.....

However....In the search for "perfect" numbers - numbers that are the sum of their proper divisors - we have a term utilized which is known as a "Mersenne" prime. It has the form,  2p-1

It is known that if this number produces a prime, then "p" itself is prime.

Unfortunately, it doesn't work the other way.....that is....if "p" is prime, then the number is prime

For instance, if p = 11, then.....

211 - 1 = 2047  = 23*89 ...which is composite......

 

{If you truly discover a "formula" that always produces a prime......you're probably too good for this site......!!! }

 

 Feb 27, 2015
 #1
avatar
0

1,2,3,5,7,11,13,17,19,23,29,31,37

 Feb 27, 2015
 #2
avatar+130516 
+5
Best Answer

Unfortunately....we don't have a general "equation" that will always produce a prime number.....

However....In the search for "perfect" numbers - numbers that are the sum of their proper divisors - we have a term utilized which is known as a "Mersenne" prime. It has the form,  2p-1

It is known that if this number produces a prime, then "p" itself is prime.

Unfortunately, it doesn't work the other way.....that is....if "p" is prime, then the number is prime

For instance, if p = 11, then.....

211 - 1 = 2047  = 23*89 ...which is composite......

 

{If you truly discover a "formula" that always produces a prime......you're probably too good for this site......!!! }

 

CPhill Feb 27, 2015

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