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Old 2020-09-15, 09:34   #1
drmurat
 
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Default giant number is not a prime

I guess that 6 * 10 ^ (900.000.000.000) is not belog to twin prime number . any idea ?
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Old 2020-09-15, 09:41   #2
retina
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Originally Posted by drmurat View Post
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?
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Old 2020-09-15, 09:49   #3
drmurat
 
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Originally Posted by retina View Post
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
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Old 2020-09-15, 09:54   #4
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Originally Posted by drmurat View Post
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
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Old 2020-09-15, 12:39   #5
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Default The giant number iş not twin prime

...

Last fiddled with by drmurat on 2020-09-15 at 13:09
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Old 2020-09-15, 13:58   #6
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Originally Posted by drmurat View Post
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.
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Old 2020-09-15, 14:15   #7
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Originally Posted by R. Gerbicz View Post
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

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Old 2020-09-15, 14:50   #8
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Originally Posted by drmurat View Post
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.
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Old 2020-09-15, 15:09   #9
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Originally Posted by R. Gerbicz View Post
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

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Old 2020-09-15, 15:21   #10
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Originally Posted by drmurat View Post
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)
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Old 2020-09-15, 15:41   #11
drmurat
 
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Originally Posted by paulunderwood View Post
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
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