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 Showing results 1 to 21 of 21 Search took 0.01 seconds. Search: Posts Made By: svempasnake
 Forum: Math 2002-11-12, 18:07 Replies: 5 Views: 2,181 Posted By svempasnake Mersenne composite using fibonacci I hope (a), but I think (b). My fantasy fails when trying to figure out any way of dealing with that number. F(2^13466917 -2) just looks like an astronomically long number to me. :(
 Forum: Software 2002-10-10, 21:05 Replies: 4 Views: 1,739 Posted By svempasnake I believe the estimate is made as described here:... I believe the estimate is made as described here: Prime95- Help, Math - Lucas-Lehmer details
 Forum: Miscellaneous Math 2002-10-09, 23:02 Replies: 16 Views: 2,408 Posted By svempasnake I like that spirit! I tried my fishing luck in... I like that spirit! I tried my fishing luck in the waters nearby : s0=4: s6 .. s10 s0=10: s6.. s9 s0=52: s6..s7 Then my patience and a 1000 digit limit called it a day. (Fishing equipment...
 Forum: Miscellaneous Math 2002-10-08, 19:46 Replies: 16 Views: 2,408 Posted By svempasnake Trying goldbach conjencture with 128 I just noticed when playing with Goldbach conjencture, putting in the number 128 (= 127 + 1), out comes 19, 31, 61 ! :surprised: Familliar figures, right? I guess this is just a funny coincidence....
 Forum: Math 2002-10-07, 23:26 Replies: 7 Views: 2,023 Posted By svempasnake Re: Another BIG number Hi, sounds like a fun challange helping you finding that out! But I don't know yet how to do that in practice. :( However, I think I can tell that your number is about 1,663,618,948 decimal digits,...
 Forum: Software 2002-09-22, 07:27 Replies: 42 Views: 3,932 Posted By svempasnake Thank you for confirming this! Made me feel... Thank you for confirming this! Made me feel comfortable posting an extended table/diagram. It's in a new topic in the math group, this thread becoming too long now IMHO. Also the original question...
 Forum: Math 2002-09-21, 21:06 Replies: 0 Views: 1,410 Posted By svempasnake Statistic for factoring rate compared to "1/n" Hi, I made a sample statistics about how often factors have been found, compared to Georges 1/n prediction. Earlier I made another post in the software forum for another smaller range. The source...
 Forum: Software 2002-09-21, 17:19 Replies: 42 Views: 3,932 Posted By svempasnake Sorry but I think I have to add some confusion... Sorry but I think I have to add some confusion here: I was curious to see wheter the original or the truncated one gets into factors.zip. To my surprise neither of these are here. Instead a smaller...
 Forum: Software 2002-09-21, 10:11 Replies: 42 Views: 3,932 Posted By svempasnake Are only TF:s counted in nofactors? Nope[/quote]On the other hand, I believe we will know this anyway, most of the time! Even better, if nofactors is updated the way I hope and belive, the cases where we can't see if a factor was found...
 Forum: Software 2002-09-16, 21:32 Replies: 42 Views: 3,932 Posted By svempasnake Re: Does the LL test:s factorization save or waste CPU time? OK, this is a part of what I can get out of it: ------------------------------------------------------ Probability that TF up to n bits will find a factor, under assumption TF already is done up to...
 Forum: Software 2002-09-14, 15:19 Replies: 42 Views: 3,932 Posted By svempasnake Dang! :surprised:ops: Youre right. Thougt I... Dang! :surprised:ops: Youre right. Thougt I tripplechecked it on a bunch of numbers, but I must have been blind. With 1 it works. Thanks for seeing it! Ah! I tested now. Yup, it fails after 308...
 Forum: Software 2002-09-14, 09:37 Replies: 42 Views: 3,932 Posted By svempasnake Not quiet :shock: : 2^66 is 7.4e19. The factor... Not quiet :shock: : 2^66 is 7.4e19. The factor mentioned here is 4.0e19 or 65 bits. I just noticed this when looking if my implementation of bits_in_factor := Round_up (log2 (factor)) works as...
 Forum: Software 2002-09-13, 15:38 Replies: 9 Views: 1,801 Posted By svempasnake Re: any body play with the soft fft crossover yes? Well sorry not yet! I have one in que tho, it's at 15,343,000 running on my PIII. I plan to just use default's. LL will start about Oct.31. Right after that I could tell whether it picked the lower...
 Forum: Software 2002-09-11, 15:33 Replies: 42 Views: 3,932 Posted By svempasnake Thanks for all replies and comments! So in... Thanks for all replies and comments! So in summary, where I went wrong was when I read 66 too literally as "trial factored to 66 bits". Now I got a better clue about what P-1 actually does. Thanks...
 Forum: Software 2002-09-10, 21:08 Replies: 42 Views: 3,932 Posted By svempasnake Does the LL test:s factorization save or waste CPU time? Hi, when I run an LL test on an ~16M exponent, the times needed on my home PC are these, roughly: Factoring up to 66 bits: a bit more than ½ day (maybe something like 14-16 hours) LL testing: about...
 Forum: Software 2002-09-09, 21:32 Replies: 2 Views: 2,269 Posted By svempasnake Re: Can I move an exponent near a FFT crossover to my P III? Sounds good! Thanks!
 Forum: Software 2002-09-09, 20:36 Replies: 2 Views: 2,269 Posted By svempasnake Can I move an exponent near a FFT crossover to my P III? Hi, I thougt about fine tuning my contribution a little, this way: I run Prime95 on a P4 at home and on a PIII at work. Two of the exponents currently assigned to my P4 are 12,698,243 and 15,343,519....
 Forum: Math 2002-09-06, 14:34 Replies: 31 Views: 4,550 Posted By svempasnake Re: Some more error numbers Practically yes :) : In the lucas_v.txt copy I've got, downloaded it about 10 days ago, "DISTINCT EXPONENT" here counts to 131563. /S-O
 Forum: Math 2002-08-26, 17:47 Replies: 31 Views: 4,550 Posted By svempasnake Re: Error Rates Dear George, thanks for your attention. I think your count is more accurate in one way, mine was semi-manual, based on sorting and counting lines manually. So, for example I was too lazy to count...
 Forum: Math 2002-08-26, 15:10 Replies: 31 Views: 4,550 Posted By svempasnake Re: Error Rates Sorry, my first "rough counting" was not right. Also chosing 6.0 - 6.5 M was out of topic, since this intervall isn't 100% double checked yet. So please forget that result (2-2.5%). So I counted...
 Forum: Math 2002-08-26, 10:21 Replies: 31 Views: 4,550 Posted By svempasnake I had a quick look into this, at the exonents... I had a quick look into this, at the exonents around 6 - 6.5 millions. According to my rough counting, I find the error rate there to be about 2% - 2.5%! Note that the FAQ suggests about 1% error...
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