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 Showing results 1 to 25 of 391 Search took 0.05 seconds. Search: Posts Made By: bur
 2021-09-22, 19:06 Replies: 13 Views: 315 Posted By bur The length has been corrected, now I can sleep... The length has been corrected, now I can sleep peacefully. Thanks for the explanations about the necessity of an odd number of digits. It's always fascinating how much can be deduced about...
 Forum: Aliquot Sequences 2021-09-21, 17:27 Replies: 3,114 Views: 248,598 Posted By bur Interesting, is it valid for most sizes of... Interesting, is it valid for most sizes of numbers? That'd be quite helpful.
 Forum: Aliquot Sequences 2021-09-20, 09:43 Replies: 3,114 Views: 248,598 Posted By bur Good to know. Why is the duplicate... Good to know. Why is the duplicate percentage so low, is that after an inital removal already?
 Forum: CADO-NFS 2021-09-20, 09:04 Replies: 63 Views: 12,097 Posted By bur Thanks, that's very helpful. I also found that... Thanks, that's very helpful. I also found that the commandline is saved to the sieving file.
 Forum: CADO-NFS 2021-09-19, 16:08 Replies: 63 Views: 12,097 Posted By bur I'm currently at mksol for the c167 (took 197M... I'm currently at mksol for the c167 (took 197M relations). I started sieving at q = 17M. Since you mentioned earlier that a value of 17M was likely too large and the unique percentage is high (76%) I...
 2021-09-17, 17:06 Replies: 13 Views: 315 Posted By bur Palindrome prime number of digits is always odd (except 11, and this is true in any base) This newly discovered largest known Palindrome prime was reported by Propper & Batalov: 10^1234567 - 20342924302 · 10^617278 - 1 (https://primes.utm.edu/primes/page.php?id=132715) It's shown as...
 Forum: Aliquot Sequences 2021-09-16, 15:56 Replies: 3,114 Views: 248,598 Posted By bur You're right, even with a summary. I must have... You're right, even with a summary. I must have been blind. Thanks again and sorry for the off-topic.
 Forum: Aliquot Sequences 2021-09-16, 14:42 Replies: 3,114 Views: 248,598 Posted By bur Thanks, to find the number of uniques I just did... Thanks, to find the number of uniques I just did a wc -l on the lines not starting with #, does that yield the correct result? Is there a faster way, does remdup output the number somewhere?
 Forum: Aliquot Sequences 2021-09-14, 16:56 Replies: 3,114 Views: 248,598 Posted By bur How can the percentage of uniques be found during... How can the percentage of uniques be found during sieving? By doing a manual filtering step on the relations? Impressive progress anyway, about the same timeframe I need for a C167...
 Forum: YAFU 2021-09-14, 12:31 Replies: 274 Views: 16,703 Posted By bur Thanks! Thanks!
 Forum: YAFU 2021-09-13, 13:06 Replies: 274 Views: 16,703 Posted By bur edit: I saw this was reported earlier and should... edit: I saw this was reported earlier and should be fixed? I pulled the newest version and did a make clean and make NFS=1 USE_SSE41=1 USE_AVX2=1 and building quits with the following error: ...
 Forum: CADO-NFS 2021-09-08, 06:04 Replies: 63 Views: 12,097 Posted By bur In an older post I saw why that initial c163... In an older post I saw why that initial c163 sieved so fast: skew 8385289.96, size 8.965e-16, alpha -7.745, combined = 1.077e-12 rroots = 5 The record is 1.096e-12.
 Forum: CADO-NFS 2021-09-07, 12:06 Replies: 63 Views: 12,097 Posted By bur Ok, good to know. Does it apply to sieving as... Ok, good to know. Does it apply to sieving as well? I never observed non-utilized cores during sieving. I started sieving a c167 from 1992:1644 on Sunday using a polynomial I searched previously...
 Forum: Aliquot Sequences 2021-09-04, 04:57 Replies: 524 Views: 63,438 Posted By bur Nothing interesting found: 10e6-11e6,... Nothing interesting found: 10e6-11e6, incr=420, P=5M, nq=5^6 Best poly: 3.380e-15 Took 590000 thread-s
 Forum: Aliquot Sequences 2021-09-03, 17:39 Replies: 524 Views: 63,438 Posted By bur Thanks, that's very helpful again. So we are not... Thanks, that's very helpful again. So we are not looking directly at the prime factors of a and b to create the squares but at the ideals?
 Forum: Aliquot Sequences 2021-09-02, 18:18 Replies: 524 Views: 63,438 Posted By bur Slightly off-topic, but I'll take the chance to... Slightly off-topic, but I'll take the chance to ask: what are singletons and ideals? In another thread you explained it as "...ideals are essentially the variables that our equations are in." Is...
 Forum: Aliquot Sequences 2021-09-02, 17:54 Replies: 524 Views: 63,438 Posted By bur Then I'll use P=5M as well, seems like a good... Then I'll use P=5M as well, seems like a good middleground between 3M(c195) and 10M(c220). CADO documentation says a large P generally results in better polys, but fewer. Ambiguous as most parameters...
 Forum: CADO-NFS 2021-09-02, 17:30 Replies: 63 Views: 12,097 Posted By bur I didn't know that. For a 10 core should I use 5... I didn't know that. For a 10 core should I use 5 clients à 4 threads or 10 à 2? And does sieving also benefit from hyperthreading? I didn't notice that problem during sieving.
 Forum: Aliquot Sequences 2021-09-02, 12:58 Replies: 524 Views: 63,438 Posted By bur I could also do a 1M range. Should the same... I could also do a 1M range. Should the same parameters be used as for the c220 search just with an nq of 5^n?
 Forum: CADO-NFS 2021-09-02, 07:59 Replies: 63 Views: 12,097 Posted By bur I'll factor a c167 soon, did you change anything... I'll factor a c167 soon, did you change anything in the params file in the meantime? Otherwise I'll use the one I used before but with wanted_rels = 190M. Which was the minimum that worked for the...
 Forum: Linux 2021-09-02, 06:08 Replies: 19 Views: 4,167 Posted By bur Ok, thanks, it worked. Are there any flags I... Ok, thanks, it worked. Are there any flags I could use to optimize e.g. for avx2? The makefile didn't look like it, but I'm far from being an expert there.
 Forum: Aliquot Sequences 2021-09-01, 17:19 Replies: 3,114 Views: 248,598 Posted By bur That sound like test-sieving is a career-option.... That sound like test-sieving is a career-option. Professional test-siever. But seriously, thanks, I always enjoy these posts.
 Forum: Factoring 2021-09-01, 12:44 Replies: 15 Views: 1,037 Posted By bur That was unexpected, the c291 from line 110... That was unexpected, the c291 from line 110 factored into p37*p42*p213 :) Also both small factors were found with a low B1 of 1e6 and 3e6, respectively.
 Forum: Linux 2021-09-01, 11:20 Replies: 19 Views: 4,167 Posted By bur I tried compiling the sources from sourceforge,... I tried compiling the sources from sourceforge, but get the following error: g++: error: packages/gwnum/64bit/gwnum.a: File or directory not found make: *** [makefile:8: pfgw64] Error 1 The...
 Forum: Aliquot Sequences 2021-08-31, 20:56 Replies: 3,114 Views: 248,598 Posted By bur Ok, then I won't get into it. Ok, then I won't get into it.
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