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Old 2016-02-28, 16:15   #298
a1call
 
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"Rashid Naimi"
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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
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Old 2016-04-17, 18:34   #299
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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
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Old 2016-04-23, 18:34   #300
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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

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Old 2016-04-23, 18:47   #301
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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
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Old 2016-04-24, 10:24   #302
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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
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Old 2016-04-24, 13:34   #303
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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
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Old 2016-04-24, 19:26   #304
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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
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Old 2016-04-24, 19:36   #305
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Quote:
Originally Posted by chris2be8 View Post
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.
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Old 2016-04-24, 20:09   #306
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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
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Old 2016-04-29, 13:19   #307
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Quote:
Originally Posted by chris2be8 View Post
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.
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Old 2016-04-29, 15:32   #308
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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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