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 Showing results 1 to 25 of 1000 Search took 0.25 seconds. Search: Posts Made By: a1call
 Forum: Miscellaneous Math 2022-08-14, 21:05 Replies: 2 Views: 24 Posted By a1call Thank you Batalov for the reply. Phi... Thank you Batalov for the reply. Phi function is foreign to me. I will try to read about it. Is the 59 yield, the largest known Prime/PRP of the form (as listed in the eois)? ETA: It seems...
 Forum: Miscellaneous Math 2022-08-14, 19:59 Replies: 2 Views: 24 Posted By a1call Probable primes off the form (2^(p^2)-1) / (2^p-1) Hey all, Are primes of the form: (2^(p^2)-1) / (2^p-1) Where p is a prime number. Example: p=7 => 4432676798593 Studied/Researched? If so how are they referred to as? Are there any known...
 Forum: Puzzles 2022-07-01, 17:51 Replies: 12 Views: 1,405 Posted By a1call I see. I missed reading the sorted in the... I see. I missed reading the sorted in the following statement: Since we keep the cells in sorted order, Thanks.
 Forum: Puzzles 2022-07-01, 17:13 Replies: 12 Views: 1,405 Posted By a1call Shouldn’t the last configuration in the example... Shouldn’t the last configuration in the example be (0, 8, 7) rather than (0, 7, 8)?
 Forum: Miscellaneous Math 2022-06-25, 02:25 Replies: 8 Views: 164 Posted By a1call You are a very wise person charybdis. Thank... You are a very wise person charybdis. Thank you very much for your replies and nice to have you back. :smile:
 Forum: Miscellaneous Math 2022-06-25, 00:12 Replies: 8 Views: 164 Posted By a1call So here is a follow-up question. Knowing that... So here is a follow-up question. Knowing that semiprimes with proximal factors can be easily factored, isn't there a potential method of multiplying a complimentary integer to N that would result in...
 Forum: Miscellaneous Math 2022-06-24, 23:29 Replies: 8 Views: 164 Posted By a1call Yes of course, silly of me not to check that... Yes of course, silly of me not to check that before asking. Thanks.
 Forum: Miscellaneous Math 2022-06-24, 23:25 Replies: 8 Views: 164 Posted By a1call Well I tried the following calculators on a... Well I tried the following calculators on a similar but much smaller and web-friendly integer without any success: ...
 Forum: Miscellaneous Math 2022-06-24, 21:48 Replies: 8 Views: 164 Posted By a1call Thank you very much for the info. As you well... Thank you very much for the info. As you well know I am not very knowledgeable in factoring. Did you use a ready made factoring software or a calculator such as Pari? Did you hit the squares on...
 Forum: Miscellaneous Math 2022-06-24, 20:18 Replies: 8 Views: 164 Posted By a1call factoring Semiprimes with Proximal factors I believe that Fermat's factorization method is ideal for factoring composites with factors that are of about the same size. This is why encryption semiprimes use factors that are Proximal but not...
 Forum: Homework Help 2022-06-10, 08:31 Replies: 24 Views: 1,454 Posted By a1call My mistake. Please disregard. My mistake. Please disregard.
 Forum: Homework Help 2022-06-10, 06:49 Replies: 24 Views: 1,454 Posted By a1call It would be an interesting puzzle to figure out... It would be an interesting puzzle to figure out the maximum number of gcd tests required if both primes are in the list of 100. I get maximum of 14 tests if Murphy’s law applies for all the tests....
 Forum: Homework Help 2022-06-10, 05:38 Replies: 24 Views: 1,454 Posted By a1call In keeping with the title of this thread, even if... In keeping with the title of this thread, even if both primes are in the list you could pinpoint them using Paul’s method with systematic grouping of the primes and then performing the gcd which will...
 Forum: Homework Help 2022-06-10, 00:45 Replies: 24 Views: 1,454 Posted By a1call That would work if only one of the 2 primes is in... That would work if only one of the 2 primes is in the list of all primes.
 Forum: Homework Help 2022-06-09, 20:39 Replies: 24 Views: 1,454 Posted By a1call Although it is highly recommended that you learn... Although it is highly recommended that you learn to use Programming/Scripting codes (PARI-GP is easy enough for me to use :smile: ), there is a Low-tech alternative that you can try. If you are...
 Forum: greenskull 2022-06-06, 22:10 Replies: 54 Views: 2,765 Posted By a1call Isn't life just beautiful? Isn't life just beautiful?
 Forum: Programming 2022-06-01, 23:59 Replies: 4 Views: 265 Posted By a1call In windows, I would import the text file into... In windows, I would import the text file into excel as delimited text: Excel >> Data >> From Text >> use appropriate delimited separator say "space" >> sort on the desired column, say the exponent...
 Forum: No Prime Left Behind 2022-05-31, 17:45 Replies: 9 Views: 532 Posted By a1call \\ I learned this from SM. In PARI-GP ... \\ I learned this from SM. In PARI-GP allocatemem() allocatemem() allocatemem() allocatemem() length(Str(2^82589933 - 1)) ##
 Forum: Factoring 2022-05-30, 17:26 Replies: 84 Views: 3,361 Posted By a1call Just in case you did not know, there are ready... Just in case you did not know, there are ready made solutions for such market place. You can access them by googling the phrase: Reverse Auction Software ETA You might also want to google the...
 Forum: Factoring 2022-05-29, 20:48 Replies: 84 Views: 3,361 Posted By a1call Thank you factorn for the... Thank you factorn for the enlightenment/clarification. As for interest in performing the mining, it is no worse that what Bitcoin miners achieve/contribute. One thing that is probably undeniable is...
 Forum: Factoring 2022-05-29, 11:51 Replies: 84 Views: 3,361 Posted By a1call Are you saying that, the “puzzle” to solve by... Are you saying that, the “puzzle” to solve by miners, is to find semiprimes within some given set parameters (size, range, factors-separation/offset) by performing factoring and subsequent primality...
 Forum: Factoring 2022-05-29, 07:09 Replies: 84 Views: 3,361 Posted By a1call Well I did try to read the PDF, but 12 pages of... Well I did try to read the PDF, but 12 pages of the complex subject is too much for my resources. I am asking genuine questions so please do not take my posts personally. I did some thinking and...
 Forum: Factoring 2022-05-29, 04:15 Replies: 84 Views: 3,361 Posted By a1call What is the advantage of: * Having a source... What is the advantage of: * Having a source that creates semiprimes from known primes and is subject to hacking, insider-leaks/cheats and otherwise accessing the same known source primes via...
 Forum: Factoring 2022-05-29, 03:20 Replies: 84 Views: 3,361 Posted By a1call So you are proposing that there is a central... So you are proposing that there is a central source who creates semiprimes by multiplying 2 known primes. Wouldn’t such a central entity defeat the purpose of blockchains which as I vaguely...
 Forum: Factoring 2022-05-29, 03:01 Replies: 84 Views: 3,361 Posted By a1call Wouldn't finding large semiprimes be more... Wouldn't finding large semiprimes be more difficult than factoring them? I am asking because I don't know. How could you prove a number semiprime without trial by division up to cube root of that...
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