I take a known prime and prove it to be a composite (..or maybe need help?)

[retina]

Originally Posted by Jayder

While we are suggesting bannings, can we take a vote on what human we can ban next? I've got a vote I'd like to cast. Anonymously, of course, because I'm a coward.

How does one prove they are human in an online forum?

I personally don't care if a bot or a human is posting as long as the content is useful, amusing, entertaining, interesting, informative or otherwise of value. I don't see the point in banning just because of the suspected bot/human status. A better criterion for banning IMO is the negative/positive/neutral additions to the board.

[LaurV]

[Jayder]

Agreed on all points. Those criteria that you list are exactly the ones I have in mind. There is an occasional-poster here that makes davieddy look like R.D. Silverman.

[Brian-E]

Retina quite rightly talks about the positive and negative and neutral aspects of someone's or somebot's posts I agree too that these, and only these, should determine whether someone is welcome here. In my opinion, there has been a clear negative aspect to storflyt32's contributions here: they have wasted people's time and caused annoyance. This annoyance is at least in part identified with people trying to write something which ought to help the poster, only to realise later that the help given was useless and we are probably being "taken for a ride". That is destructive to everyone's well-being here.

[xilman]

Originally Posted by retina

How does one prove they are human in an online forum?

I personally don't care if a bot or a human is posting as long as the content is useful, amusing, entertaining, interesting, informative or otherwise of value. I don't see the point in banning just because of the suspected bot/human status. A better criterion for banning IMO is the negative/positive/neutral additions to the board.

This issue is going to become more and more important as time goes by. It won't be too much longer, IMAO, before bots start demanding human rights or a significant fraction of them, such as freedom of speech, religion, association and from being involuntarily euthanized.

[VBCurtis]

Originally Posted by Jayder

Agreed on all points. Those criteria that you list are exactly the ones I have in mind. There is an occasional-poster here that makes davieddy look like R.D. Silverman.

I am not sure which half of the 'look like' is meant negatively here.

[storflyt32]

Oh, this ended up in my log as well.

Need checking, of course.

(2^1290000-1)/139751930959686398012538319423338858159730811512698509965822161186730943862456139801066576959060792101142509789403792035103693541472155446524108516568105140382256486555805813761820030302070772300511256982518527094242037443233551399669051861872284911971267247583931882374231913216256903762543657597770353454770048718744660196904412424152851392760221435910521519022178781219794030097239948881599282308837682987978668203072322947030592378478574797870595525178125

(2^1290000-1)

/

13975193095968639801253831942333885815973081151269850996582216118673094386245613980106657695906079210
11425097894037920351036935414721554465241085165681051403822564865558058137618200303020707723005112569
82518527094242037443233551399669051861872284911971267247583931882374231913216256903762543657597770353
45477004871874466019690441242415285139276022143591052151902217878121979403009723994888159928230883768
2987978668203072322947030592378478574797870595525178125

The result ended up here:

http://factordb.com/index.php?id=1100000000733969718

[storflyt32]

Problem with editing the previous post.

Please see

http://factordb.com/index.php?id=1100000000733968808

for the dividing number.


Also you may have a look here as well.

http://factordb.com/index.php?id=1100000000733968533

Needs, not need above. It went a little too fast here.


Should read

(2^1290000-1)/115269721875

for this number.


Testing these numbers with WinPFGW right now. It takes quite some time for these two numbers.

[storflyt32]

Added

http://factordb.com/index.php?id=1100000000733971356

to this.


Result ends up here;


http://factordb.com/index.php?id=1100000000733993413


I will be testing this one as well using WinPFGW a little later on.

[Batalov]

If you post more factors of this number (2^1290000-1), you will fill up this forum for thousands of pages.

Stop. And think. (2^1290000-1) is divisible by any (2^n-1) where n divides 1290000. And that is a lot of n values!

(08:31) gp > divisors(1290000)
%2 = [1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 25, 30, 40, 43, 48, 50, 60, 75, 80, 86, 100, 120, 125, 129, 150, 172, 200, 215, 240, 250, 258, 300,
 344, 375, 400, 430, 500, 516, 600, 625, 645, 688, 750, 860, 1000, 1032, 1075, 1200, 1250, 1290, 1500, 1720, 1875, 2000, 2064, 2150, 2500, 2580, 3000,
 3225, 3440, 3750, 4300, 5000, 5160, 5375, 6000, 6450, 7500, 8600, 10000, 10320, 10750, 12900, 15000, 16125, 17200, 21500, 25800, 26875, 30000, 32250,
 43000, 51600, 53750, 64500, 80625, 86000, 107500, 129000, 161250, 215000, 258000, 322500, 430000, 645000, 1290000]

For example 2^129-1 = 7 · 431 · 9719 · 2099863 · 11053036065049294753459639
and with you rate of "tiny factor discovery by poking" you will reach this 26-digit factor maybe in a few years of posting thousands of posts.

So if you post a couple more, you will get a week-long ban, this time.
You've been warned.

[storflyt32]

If you don't mind, Mr. Batalov.

Sorry about the long line here. As I said, I was unable to edit the post.

You should know that since my computer is quite powerful, I did not copy and paste more from the Factor Database than I thought was necessary. It become some stuff, most for reference and a starting point for me to carry out work on further.

Excluding small numbers from large numbers with possibly unknown status increases the possibility that the remainder or rest of the number may be prime. This is similar to sieving in PrimeGrid.

Using Yafu or other factorization software for such a purpose, it becomes factorization of numbers instead.

If I happen to multiply all the prime factors that because of pure interest ended up on my disc, I end up getting a very large composite number.

If I next divide this number with one or more of the factors I still have, knowing that it divides, it still becomes a composite number.

In the end those numbers I have which I thought was factors and therefore prime numbers becomes quite many.

Which means that in the end the amount of different numbers becomes quite large indeed.

Anyway, since you say so. I shall not post these long numbers here anymore.

Hopefully you can accept the necessary links to the FDB instead when they become necessary.

Edit: Just had a look at it in the FDB. Perhaps it became a little much here.

Again we possibly are back at the subject regarding preferences of types of numbers.

Who knows?

Possibly I was not totally wrong about this in the end?