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 2016-02-28, 16:15 #298 a1call     "Rashid Naimi" Oct 2015 Remote to Here/There 22·487 Posts Hi, Finally had some time to setup a new hard disk, install 64 bit ubuntu and Primo 4.1.1. My first certified Prime has 4351dd: http://factordb.com/index.php?id=1100000000824783248 Question: * How do you determine the optimum Sieve-Bit parameter? http://www.ellipsa.eu/public/primo/primo.html#Timings Thank you in advance
 2016-04-17, 18:34 #299 chris2be8     Sep 2009 22×487 Posts Another pair where proving the smaller http://factorization.ath.cx/index.ph...00000832912748 will enable a N-1 proof for the larger http://factorization.ath.cx/index.ph...00000832685935 ((34^251-1)^2-2)/23 The smaller was created when I added the algebraic factors of ((34^251-1)^2-2)/23-1 since that's ((34^251-1)^2-25)/23 so splits into (34^251-6)(34^251+4). Chris
 2016-04-23, 18:34 #300 chris2be8     Sep 2009 22×487 Posts Thanks to whoever proved the last pair. And here's another pair. Proving http://factorization.ath.cx/index.ph...00000836244837 (386 digits) will enable a N-1 proof for (23369^283-1)/23368, http://factorization.ath.cx/index.ph...00000835634181 (1232 digits). Chris Last fiddled with by chris2be8 on 2016-04-23 at 18:48 Reason: Spelling
 2016-04-23, 18:47 #301 chris2be8     Sep 2009 111100111002 Posts And another, proving http://factorization.ath.cx/index.ph...00000836244978 (401) digits will enable a N-1 proof for (26437^283-1)/26436, http://factorization.ath.cx/index.ph...00000835634435 (1248 digits). Chris
 2016-04-24, 10:24 #302 chris2be8     Sep 2009 79C16 Posts And another. Proving http://factorization.ath.cx/index.ph...514&open=prime (520 digits) prime will enable a N-1 proof for (24767^373-1)/24766 http://factorization.ath.cx/index.ph...00000835636422 (1635 digits). Chris
 2016-04-24, 13:34 #303 chris2be8     Sep 2009 194810 Posts And again. Proving http://factorization.ath.cx/index.ph...00000836283883 (594 digits) will enable a N-1 proof for (13901^439-1)/13900 http://factorization.ath.cx/index.ph...00000835637312 (1815 digits). Chris
 2016-04-24, 19:26 #304 chris2be8     Sep 2009 22×487 Posts And another pair. Proving http://factorization.ath.cx/index.ph...00000836303593 (628 digits) will enable a N-1 proof for (22853^457-1)/22852 http://factorization.ath.cx/index.ph...00000835639140 (1988 digits). Chris
2016-04-24, 19:36   #305
vebis

Oct 2015

1048 Posts

Quote:
 Originally Posted by chris2be8 And another pair. Proving http://factorization.ath.cx/index.ph...00000836303593 (628 digits) will enable a N-1 proof for (22853^457-1)/22852 http://factorization.ath.cx/index.ph...00000835639140 (1988 digits). Chris
Did a combined N+1/N-1 proof on the p628.

 2016-04-24, 20:09 #306 chris2be8     Sep 2009 22×487 Posts And again... Proving http://factorization.ath.cx/index.ph...00000836304391 (503 digits) will enable a N-1 proof that (22943^463-1)/22942 http://factorization.ath.cx/index.ph...00000835639239 (2015 digits) is prime. Chris
2016-04-29, 13:19   #307
Wick

Nov 2012

23×32 Posts

Quote:
 Originally Posted by chris2be8 And again. Proving http://factorization.ath.cx/index.ph...00000836283883 (594 digits) will enable a N-1 proof for (13901^439-1)/13900 http://factorization.ath.cx/index.ph...00000835637312 (1815 digits). Chris
All done except this one. Proving the smaller one did not enable the proof button for the larger one.

 2016-04-29, 15:32 #308 chris2be8     Sep 2009 22×487 Posts That's odd. http://factorization.ath.cx/index.ph...312&open=prime now says it's proven by N-1. I've sometimes seen factordb take a little while to recognize updates, that might have happened here. Thanks for proving all the smaller ones anyway. Chris

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