I don't think I understand it.

A main property of the prime numbers is that there don't exist a fast mathod for predicting wheter a number is prime or not.]]>

As for your question, I'm not entirely sure what you mean. The odd numbers can be represented by the set:

Which basically means all the numbers such that they can be written in the form 2k + 1 where k is an integer. So for example:

1 = 2*0 + 1

3 = 2*1 + 1

5 = 2*2 + 1

...

25= 2*12 + 1

But you can't have 24 because:

24 = 2*11.5 + 1 but 11.5 isn't an integer.

Now if you wanted only from 1 to 80, then you would have:

That additional 0 ≤ x ≤ 80 makes it so x can't be -3 or 255, or any other number outside the bounds.

Is this what you were asking?

]]>MathsIsFun wrote:Yes, but just because you always see fish in water, does not mean that every time you see water there will be fish

The primes are a bit like fish too. When you find one you recognise it (in the case of primes you test to make sure they have no prime factors). But you don't always find them where you expect.

i have question that how can i make match all the odd number form 1 to 80 there are total 40 odd numbers

i want all the odd numer in1 row form example1,3,5,7,9,11,13,15,17,19

but i want to match all the number odd numbers with one row from 1 to 80 how may rows it will take i want to make it in simple way . try to say me that i want to make with 150 rows can i do that

why no reply for my question

]]>i want all the odd numer in1 row form example

1,3,5,7,9,11,13,15,17,19

but i want to match all the number odd numbers with one row from 1 to 80 how may rows it will take i want to make it in simple way . try to say me that i want to make with 150 rows can i do that

Yes, but just because you always see fish in water, does not mean that every time you see water there will be fish

The primes are a bit like fish too. When you find one you recognise it (in the case of primes you test to make sure they have no prime factors). But you don't always find them where you expect.

i have question that how can i make match all the odd number form 1 to 80 there are total 40 odd numbers

i want all the odd numer in1 row form example

1,3,5,7,9,11,13,15,17,19

but i want to match all the number odd numbers with one row from 1 to 80 how may rows it will take i want to make it in simple way . try to say me that i want to make with 150 rows can i do that

Yes, but just because you always see fish in water, does not mean that every time you see water there will be fish

The primes are a bit like fish too. When you find one you recognise it (in the case of primes you test to make sure they have no prime factors). But you don't always find them where you expect.

i have question that how can i make match all the odd number form 1 to 80 there are total 40 odd numbers

i want all the odd numer in1 row form example

but i want to match all the number odd numbers with one row from 1 to 80 how may rows it will take i want to make it in simple way . try to say me that i want to make with 150 rows can i do that

Hi r.santhoskumar,

I am sure those two links would be helpful.

Here's another bigger list of Prime numbers and more about Prime numbers.

sir kindly tell me that how can i find that next number is prime......i got an answer that all prime numbers comes after or befor a number divisible by6 expect 2,3 ...this is true for some time not for all the times... try to help me

]]>kempos wrote:i don't think it's possible to predict when there will be a prime number. but might be wrong :-(

try to find that how that primernumber comes in above number atleast trt to find that how to find even a single prime number or any number comes after what type of number i will be very use full if u do this

try to find any number that how does the number come in this number comes abovein last post what ever it may be even or odd or pirmenumber or anyone number 1,2,3,4,5,6,7,8,9,0 what evryit may i need that how that number comesafter what type of number doesit come i will be veryusefull if u do this

]]>i don't think it's possible to predict when there will be a prime number. but might be wrong :-(

try to find that how that primernumber comes in above number atleast trt to find that how to find even a single prime number or any number comes after what type of number i will be very use full if u do this

]]>My conjecture is true.

why no reply for my question try to send me an example for ur answer please i will be very use full if u do this ok