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Old 2004-02-10, 23:17   #1
Citrix
 
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Jun 2003

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Arrow 6 new K's

Here are 6 new k's I found using a program I wrote.
I will be working on these but if some one else is interested on working on these k's, they can coordinate with me, otherwise they are reserved for me.

I think one of these will be good enought ot take to 10 million in case all the other 15 k fail.

k Weight
1064887395 6295 //Reserved by Cyrix
254107425 6319
1842574305 6763
1362724935 6420
736320585 6793 // Also on the choose a candidate page so I will release this k
247016055 6522
958516845 6601


Here are some 32 bit ones

k Weight
3428677395 4.05 //seems to be the heaviest in the list. reserved by citrix
2298785775 3.64
2364971895 3.70
2993740035 3.92


Just a note:-

The program takes about 1 min to run. These k's are heavy because k*2^n-1 has no factors which are also factors of the numbers such as 2^n-1. n from 1 to 32.


Citrix


PS: I would appreciate some help as I don't have alot of computing power.

Last fiddled with by Citrix on 2004-02-14 at 03:15
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Old 2004-02-11, 16:39   #2
cyrix
 
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Maybe I could do some work on k=1064887395 (n from 150k to 200k).

Have you a presieved file, or should I sieve it for myself?

Cyrix
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Old 2004-02-11, 17:38   #3
Citrix
 
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Quote:
Originally Posted by cyrix
Maybe I could do some work on k=1064887395 (n from 150k to 200k).

Have you a presieved file, or should I sieve it for myself?

Cyrix
YOull have to sieve it yourself. I haven't really started working on them yet. I have a previous range to finish first.

Citrix
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Old 2004-02-12, 10:56   #4
cyrix
 
Jul 2003
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1064887395 151847 is prime!
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Old 2004-02-12, 15:07   #5
Kosmaj
 
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Nov 2003

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Cyrix,

Congrats!
Such a quick reaction and a well selected range!
:surprised
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Old 2004-02-12, 15:38   #6
ET_
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"Luigi"
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Congratulations!

Luigi
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Old 2004-02-13, 04:14   #7
jocelynl
 
Sep 2002

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I'll be working on the lower part of these n's up to 150k


Joss
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Old 2004-02-13, 06:00   #8
jocelynl
 
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I started 1064887395
and it is a very good candidate at 20k it has 71 primes!
100th prime shoud be reached at n=78201

I also started 254107425
and at 20k it has 54 primes still a good candidate
100th prime here should be at n=378186 I'll no longer test this one.

Joss
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Old 2004-02-13, 17:34   #9
Citrix
 
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I found 59 primes for k=3428677395 under 12500. is it worth testing this one above 150K?
50 primes were under 5000 and then 9 between 5000-12500.

Citrix

Last fiddled with by Citrix on 2004-02-14 at 03:15
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Old 2004-02-13, 22:17   #10
jocelynl
 
Sep 2002

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higher range take longer to LLR but you also have to take into consideration the number of n's to test. If after sieving you have less than normal n's left, it might usefull to try higher range.

Quote:
I found 59 primes for k=3428677395 under 12500. is it worth testing this one above 150K?
50 primes were under 5000 and then 9 between 5000-12500.
It's not as good as 1064887395 but you will still find quite a few primes.
Have you notice, it is a 2145k. Most of our top candidate are 2145k.

Joss
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Old 2004-02-14, 00:49   #11
Citrix
 
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Quote:
Originally Posted by jocelynl
It's not as good as 1064887395 but you will still find quite a few primes.
Have you notice, it is a 2145k. Most of our top candidate are 2145k.

Joss
All k's generated will be multiples of 3,5,11,13,19,29
So you can see all are multiples of 1181895

Citrix
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