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 Showing results 1 to 25 of 1000 Search took 0.48 seconds. Search: Posts Made By: Batalov
 Forum: YAFU 2022-11-28, 00:26 Replies: 2 Views: 116 Posted By Batalov .w files are legacy files - the author of the... .w files are legacy files - the author of the sieve wrote his code in CWEB (Don Knuth's) language (https://manpages.ubuntu.com/manpages/focal/en/man1/cweave.1.html). This language allows to write and...
 Forum: Puzzles 2022-11-26, 01:56 Replies: 66 Views: 2,369 Posted By Batalov Good point, I have not checked. The idea to use... Good point, I have not checked. The idea to use those k*10^n+1 was a momentary lapse of reason, I just looked at a few similar ones from UTM top (even with one-digit k values, they have "1", "k"...
 Forum: Puzzles 2022-11-25, 19:28 Replies: 66 Views: 2,369 Posted By Batalov Here's the apparent champion of primes* for which... Here's the apparent champion of primes* for which all anagrams are composite. It was found by unconnected a few years ago: 68400000000000000000000...0000000000000000001...
 Forum: Puzzles 2022-11-21, 04:51 Replies: 66 Views: 2,369 Posted By Batalov but (2*10^282948-11)/9 i.e. 2....{282947 of... but (2*10^282948-11)/9 i.e. 2....{282947 of them}...21 is prime. What does it tell you? Who wrote that?
 Forum: Puzzles 2022-11-21, 04:02 Replies: 66 Views: 2,369 Posted By Batalov You still have to find a prime then it is... You still have to find a prime then it is trivial. Have you?
 Forum: Msieve 2022-11-21, 01:10 Replies: 6 Views: 435 Posted By Batalov For your input number, your best hope is ecm.py... For your input number, your best hope is ecm.py (https://mersenneforum.org/showthread.php?p=617183#post617183) (or you can run ecm (https://members.loria.fr/PZimmermann/records/ecm/devel.html) with...
 Forum: PrimeNet 2022-11-21, 01:02 Replies: 2,634 Views: 356,896 Posted By Batalov Use https://www.mersenne.org/update/ Where... Use https://www.mersenne.org/update/ Where (which page) did you find the old link? ( https://v5www.mersenne.org/update/ )
 Forum: Aliquot Sequences 2022-11-20, 10:52 Replies: 3,716 Views: 469,868 Posted By Batalov Take 1460460 Take 1460460
 Forum: Msieve 2022-11-20, 01:09 Replies: 6 Views: 435 Posted By Batalov Short answer is you are using the specialized... Short answer is you are using the specialized tool as a general tool. msieve if called in commandline like you did will default to QS (quadratic sieve); this is not going to work with a 261-digit...
 Forum: Aliquot Sequences 2022-11-18, 22:04 Replies: 1,038 Views: 148,468 Posted By Batalov 2698194 merged 2698194 (http://factordb.com/sequences.php?se=1&aq=2698194&action=last20&fr=0&to=100) merged with 4800 (http://factordb.com/sequences.php?se=1&aq=4800&action=last20&fr=0&to=100)
 Forum: Puzzles 2022-11-18, 04:52 Replies: 66 Views: 2,369 Posted By Batalov Btw, there is always room for PRP searching (last... Btw, there is always room for PRP searching (last time I searched for those was a decade ago, so computers are faster now, why not try a couple of series)... Well, we can say that these will...
 Forum: Puzzles 2022-11-18, 00:47 Replies: 66 Views: 2,369 Posted By Batalov Is this the right thread for it? what does it... Is this the right thread for it? what does it have to do with anagrams? Re: "task myself to find prime numbers of the form". It has been done 10-20 years ago. Why waste time?...
 Forum: MattcAnderson 2022-11-17, 21:19 Replies: 31 Views: 2,121 Posted By Batalov Every input is valuable. But all of what you... Every input is valuable. But all of what you wrote are not anagrams.
 Forum: Aliquot Sequences 2022-11-16, 20:09 Replies: 3,716 Views: 469,868 Posted By Batalov Take 2698194 Take 2698194
 Forum: Soap Box 2022-11-16, 18:43 Replies: 564 Views: 35,734 Posted By Batalov How would I know by whom? - I said Carlos'... How would I know by whom? - I said Carlos' message wasn't noise, the deaths were real and not fake news and the investigation that then started was real. Noise is for example "what words Lavrov...
 Forum: Soap Box 2022-11-16, 02:46 Replies: 564 Views: 35,734 Posted By Batalov You probably know that you are way too far in the... You probably know that you are way too far in the woods, if each of your posts asks for forgiveness in the first line. Nearly no exceptions. "Please forgive me for" saying this, but you are...
 Forum: Puzzles 2022-11-16, 02:32 Replies: 66 Views: 2,369 Posted By Batalov Then all you need is re-read what uau said. He is... Then all you need is re-read what uau said. He is describing the Poisson distributions (which are an estimate of a large amount of sampling experiments; each specific sampling experiment may be...
 Forum: Puzzles 2022-11-15, 16:37 Replies: 66 Views: 2,369 Posted By Batalov For an n-digit "9..4..9", there are exactly n... For an n-digit "9..4..9", there are exactly n permutations. For example, for n=10123, there are 10123 permutations. For an n-digit "9..4..2..9", there are exactly n*(n-1) permutations. For...
 Forum: Miscellaneous Math 2022-11-15, 06:09 Replies: 8 Views: 524 Posted By Batalov Please explain what do you think the word... Please explain what do you think the word "formula" means. :pb:
 Forum: Puzzles 2022-11-15, 02:46 Replies: 66 Views: 2,369 Posted By Batalov I did describe this process above. I did describe this process above.
 Forum: Puzzles 2022-11-15, 01:27 Replies: 66 Views: 2,369 Posted By Batalov Actually, if we move along from using "9" as the... Actually, if we move along from using "9" as the repeated digit, we can construct arbitrarily large n with two non-matching digits, - the repeated digit has to be not in {1,3,7,9}. For...
 Forum: Puzzles 2022-11-14, 18:39 Replies: 66 Views: 2,369 Posted By Batalov Correct. I meant someone can make a contest of... Correct. I meant someone can make a contest of the few larger examples of that kind but they will hit the wall at fairly small digit lengths. Two last entries for the largest size (one prime and...
 Forum: Puzzles 2022-11-14, 01:08 Replies: 66 Views: 2,369 Posted By Batalov Some larger 9999..99998999...999 primes, for... Some larger 9999..99998999...999 primes, for which all the anagrams are composite: 10^30145-10^3508-1 10^30149-10^4211-1 10^30161-10^6156-1 10^30165-10^26233-1 10^30167-10^16755-1...
 Forum: Puzzles 2022-11-13, 09:47 Replies: 66 Views: 2,369 Posted By Batalov Not really. The answer to both of these... Not really. The answer to both of these challenges is : NONE.
 Forum: Soap Box 2022-11-13, 05:27 Replies: 564 Views: 35,734 Posted By Batalov The saddest thing is actually that you don't... The saddest thing is actually that you don't understand that U.S.S.R. ≠ Russia. Many of "their boys" were Ukrainians, Kazakhs, Armenians, Georgians (including one Joseph Stalin), Byelorussians,...
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