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

Kosmaj 2006-04-14 00:22

Thanks for the overview and congrats on many primes. I'll add them to the list asap. I also failed to mark k=127 as reserved by Curtis. But those found in the 2nd Drive should be all [URL="http://www.15k.org/riesellist.htm"]there[/URL].

MooooMoo 2006-04-22 18:46

1 Attachment(s)
Monthly update:

k=19 to n=600,000. I've also attached the residues to this post. I haven't found any primes yet, but I'll stick with this k until I do find one :smile:

sjtjung 2006-04-26 15:02

Hi, I'm Steven Tjung, one of Curtis' high school kids. I've been testing 127 so far and I'd like to reserve k=103 to n=500000. I have an AMD Athlon 1400MHz at home and I'm looking forward to find a prime number.

Kosmaj 2006-04-27 06:51

Steven,

Welcome to RPS!

But I suggest that you reconsider the k to work on. I'm sure you'd like to find your first prime soon, but I'm afraid k=103 is not the right one. First, it's not so prolific, and second, and more important, somobody has already worked on a subset of the 200-500k range, he found a prime at n=304771 but he never reported the range he tested. Possibly, he did the whole range already. Instead, how about a [I]k [/I]in the 197-217 range (except k=199) or k>=237. Let me know if need a more specific suggestion. Have a look [URL="http://www.15k.org/riesellist.htm"]here[/URL] for details.

Thomas11 2006-04-27 08:34

This is just another status report:

[B]k=11[/B] has reached [B]n=1.34M[/B]
[B]k=29[/B] has reached [B]n=1.66M[/B]

[B]k=147[/B] has been completed through [B]n=500k[/B], releasing this k.

[B]k=155[/B] is currently around [B]n=560k[/B].

For both, k=141 and k=147, the lower range n=100000-200000 has been double-checked, no new primes found.

sjtjung 2006-04-27 23:23

Kosmaj, Thank you for the suggestion. After I talk to Curtis, I came up that I'm still going to take the 103 and re-test the number and make it clear up to 500000. Thanks again.

Kosmaj 2006-04-28 00:28

OK, no probs, k=103 is yours, and good luck!

lsoule 2006-04-30 13:52

status report
 
k=195 is at n=523k
k=231 is at n=839k
k=69 is at n=700k
k=223, tested up to n=1M at released

lsoule 2006-04-30 13:59

k=39
 
Reserving k=39 from n=500k

VBCurtis 2006-05-03 01:04

Reserving k=45 from n=500k onward. I plan to sieve very deeply for a possible future team LLRing effort on this high-weight k. I'll post when I am ready for LLR reservations.
-Curtis

Thomas11 2006-05-05 09:01

k=155
 
k=155 has reached n=700k now. No primes so far... :no:


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