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-   -   Riesel Primes k*2^n-1, k<300 [Was "k=1"] (https://www.mersenneforum.org/showthread.php?t=1767)

Kosmaj 2005-12-11 23:07

I'm also taking k=193.

The [URL=http://www.15k.org/riesellist.htm]stats page[/URL] is updated.

Kosmaj 2005-12-21 09:53

63*2^323432-1 is prime, 97365 digits. :smile:

Current status (search started at n=200k)
k=63 checked to n=323600,
k=193 checked to n=375000.

lsoule 2005-12-21 18:04

Reserving 247 from n=400k

Status of k=231: at n=713k and continuing

Kosmaj 2005-12-27 03:18

A lucky weekend, three primes found, all three with more than 100k digits :cool:

[B]193*2^439107-1 [/B] 132187 digits
[B]193*2^405483-1 [/B] 122065 digits
[B]63*2^340463-1 [/B] 102492 digits

Templus 2005-12-28 10:35

update on k=93
 
k=93 has been sieved until 440bn for 330000<n<400000 and 3600 tests are left.
I hope (expect! :rolleyes: ) that I will find at least 1 prime in this range, for I am searching a long long time on a new one.

Cruelty 2005-12-30 22:02

k=25 no primes till n=500000 :no: , I'll continue until I find one :smile:

lsoule 2006-01-24 18:06

After a couple of big primes for my ks < 300, I thought I'd post a status
update for all of them:

69: Complete through n=580k, prime at n=580596
231: Complete through n=750k, prime at n=749301
247: Complete through n=850k

All 3 are continuing

lsoule 2006-01-26 22:34

Reserving k=223 from n=210k

Thomas11 2006-02-02 13:41

This is just a status update:

[B]k=11[/B]: tested upto [B]n=1.2M[/B]
[B]k=29[/B]: tested upto [B]n=1.6M[/B]

No new primes found, continuing both k.

Thomas11 2006-02-02 18:35

I'll take k=191 a little bit further. The stats page reports that it is tested upto n=270000, so I'll start there. Please let me know, if someone else is already testing this k.

-- Thomas11

Kosmaj 2006-02-04 04:01

[B]Thomas[/B], thanks for your report, I updated the [URL="http://www.15k.org/riesellist.htm"]stats page[/URL], and reserved k=191 for you. I'm not aware that anybody else is working on it.

BTW, I cancelled outstandig reservations by Jeffrey of k=9, 51, 59, and 117. It's possible that he checked these k's to a little bit higher limits than indicated but I have no means to find out. I think he stopped all his clients shortly after he found a prime for k=9 at n=828k.


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