giant number is not a prime

[drmurat]

I guess that 6 * 10 ^ (900.000.000.000) is not belog to twin prime number . any idea ?

[retina]

Originally Posted by drmurat

I guess that 6 * 10 ^ (900.000.000.000) is not belog to twin prime number . any idea ?

Given that the number you posted is divisible by 2 then that means you are correct, it isn't part of any prime sequence.

Can I now also guess an even number and claim that it doesn't belog [sic] to any twin prime?

[drmurat]

Originally Posted by retina

Given that the number you posted is divisible by 2 then that means you are correct, it isn't part of any prime sequence.

Can I now also guess an even number and claim that it doesn't belog [sic] to any twin prime?

yes I guess that the number 6 x 10 ^ (900.000.000.000) + 18 x 10 ^ ( 450.000.000.000) + 1 also is not belong to twin prime number

[drmurat]

Originally Posted by drmurat

yes I guess that the number 6 x 10 ^ (900.000.000.000) + 18 x 10 ^ ( 450.000.000.000) + 1 also is not belong to twin prime number

I also mention values of k in 6 x k +1 and 6 x k 1

[drmurat]

...

[R. Gerbicz]

Originally Posted by drmurat

yes I guess that the number 6 x 10 ^ (900.000.000.000) + 18 x 10 ^ ( 450.000.000.000) + 1 also is not belong to twin prime number

Yes, that is true, since if N denotes your number then N+2 is divisible by 3 and N-2 is divisible by 107.

[drmurat]

Originally Posted by R. Gerbicz

Yes, that is true, since if N denotes your number then N+2 is divisible by 3 and N-2 is divisible by 107.

This number isk value so we must find 6 x k and than we must look 6 x k+ 1 and 6 x k - 1to check primabilty but how did you calculated 107 easly

[R. Gerbicz]

Originally Posted by drmurat

This number isk value so we must find 6 x k and than we must look 6 x k+ 1 and 6 x k - 1to check primabilty but how did you calculated 107 easly

I've thought that I understand you, but not. Learn more Maths, and more English.

[drmurat]

Originally Posted by R. Gerbicz

I've thought that I understand you, but not. Learn more Maths, and more English.

Thanks for your advice. I Will do but how did you devide such a big number to107. How did you check primabilty so easly I also give much bigger samples

[paulunderwood]

Originally Posted by drmurat

Thanks for your advice. I Will do but how did you devide such a big number to107. How did you check primabilty so easly I also give much bigger samples

This Robert at his computer:


Know that a*b mod n is the same as (a mod n) * (b mod n)

[drmurat]

Originally Posted by paulunderwood

This Robert at his computer:


Know that a*b mod n is the same as (a mod n) * (b mod n)

Thanks you but my english is not so well. And This unswer Will change my life view. Can you explain step by step how can we devide This giant number to 107 easly