Riesel Primes k*2^n-1, k<300 [Part II] - Page 92

Cruelty · 2021-01-26, 12:01

k=25 tested till n=5.66M

kuratkull · 2021-02-02, 12:40

progress report:

k=193 at n=4.6M
k=195 at n=4.6M
k=197 at n=4.6M

Trilo · 2021-02-06, 14:46

k=55 at 2.2M.

gd_barnes · 2021-02-11, 08:52

Reserving k=213, 221, 255, and 285 to n=2M.

These k's are reserved but last had a status report over 6 years ago. The last prime reported on any of them was nearly 4 years ago. Apparently they are abandoned. Based on the primes reported many of them have probably already been tested to n=~2M so this will likely mostly be a doublecheck effort.

These are the only remaining k < 300 that are reported at n<2M so completing this would be a nice milestone for the project.

I will test (doublecheck?) these 4 k's for n=1M-2M as a followup to my doublecheck of all k<300 to n=1M that is nearly complete. It should only take a few weeks.

Karsten, would it make sense to go through your rieselprime.de page for k < 300 and release any individual reservations that are more than 3 years old ?

VBCurtis · 2021-02-11, 14:43

Did you try contacting the people who have them reserved?

gd_barnes · 2021-02-11, 22:42

Quote:

Originally Posted by VBCurtis

Did you try contacting the people who have them reserved?

I did a due diligence on them:

k=213 reserved by Chaos13; last status on this k 2014-02-28; last prime reported on this k 2017-07-18; last time posting at RPS 2014-04-28; last known activity on Mersenneforum 2019-10-14

k=221 reserved by sjtjung; last status on this k 2014-09-13; no prime reported on this k; last time posting at RPS 2016-01-27; last known activity on Mersenneforum 2016-09-27

k=255 reserved by Kosmaj; last status on this k 2012-07-02; last prime reported on this k 2015-04-26; last time posting at RPS 2019-05-25; last known activity on Mersenneforum 2019-05-25

k=285 reserved by shanecruise; last status on this k 2013-05-21; last prime reported on this k 2013-04-03; last time posting at RPS 2013-05-21; last known activity on Mersenneforum 2014-03-23

I will go ahead and send all of them a PM although it seems unlikely that I will get a response.

gd_barnes · 2021-02-12, 21:48

Karsten,

k=255 was already tested to n=2M.

See this post:
https://mersenneforum.org/showpost.p...&postcount=901

See the final post in this thread:
https://mersenneforum.org/showthread.php?t=16883

See the old Riesellist page:
http://kosmaj.sakura.ne.jp/rps/riesellist.html

Your Wiki page only has it tested to n=1.07M.

I will keep it reserved to n=2M as a complete doublecheck.

Chaos13 · 2021-02-13, 01:24

Gary- responded to you privately. Thanks for reaching out.

VBCurtis · 2021-02-13, 01:29

Quote:

Originally Posted by Chaos13

Gary- responded to you privately. Thanks for reaching out.

Is there an update for search depth? Are you still working on it?
That sort of info should not be kept in PM when we have this thread for it.

gd_barnes · 2021-02-13, 01:50

Status on follow ups:

I got a PM response from Chaos. He is going to keep k=213. I have asked him to report his search depth here. He has reported several top-5000 primes for n>2M. I let him know my intent to doublecheck the k up to n=2M so I won't be doing anything that he hasn't already done.

No response on k=221. The last reported status at n=1.85M. I'm currently in the process of doublecheking n=1M-1.85M and will complete it to n=2M.

Shanecruise responded and is fine with me taking k=285. The last reported status is at n=1.64M. I will doublecheck n=1M-1.64M and will complete to n=2M. Work will begin after k=221.

After finding in the threads in several places that the search depth for k=255 is already at n=2M I did not follow-up with Kosmaj. I would not be stepping on any toes doing a doublecheck up to n=2M.

VBCurtis · 2021-02-13, 05:49

Gary-
She.

I haven't talked to sjtjung in a year or so; this is a good excuse for me to reach out to him. He was a student of mine fifteen years ago. I doubt he's still searching 221, but he's more likely still going on k=31.

2021-01-26, 12:01	#1002
Cruelty May 2005 2²·11·37 Posts	status report k=25 tested till n=5.66M

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2021-02-02, 12:40	#1003
kuratkull Mar 2007 Estonia 95₁₆ Posts	progress report: k=193 at n=4.6M k=195 at n=4.6M k=197 at n=4.6M

2021-02-06, 14:46	#1004
Trilo "W. Byerly" Aug 2013 81*2^3174353-1 133₁₀ Posts	k=55 at 2.2M.

2021-02-11, 08:52	#1005
gd_barnes "Gary" May 2007 Overland Park, KS 12046₁₀ Posts	Reserving k=213, 221, 255, and 285 to n=2M. These k's are reserved but last had a status report over 6 years ago. The last prime reported on any of them was nearly 4 years ago. Apparently they are abandoned. Based on the primes reported many of them have probably already been tested to n=~2M so this will likely mostly be a doublecheck effort. These are the only remaining k < 300 that are reported at n<2M so completing this would be a nice milestone for the project. I will test (doublecheck?) these 4 k's for n=1M-2M as a followup to my doublecheck of all k<300 to n=1M that is nearly complete. It should only take a few weeks. Karsten, would it make sense to go through your rieselprime.de page for k < 300 and release any individual reservations that are more than 3 years old ?

2021-02-11, 14:43	#1006
VBCurtis "Curtis" Feb 2005 Riverside, CA 5²·229 Posts	Did you try contacting the people who have them reserved?

2021-02-12, 21:48	#1008
gd_barnes "Gary" May 2007 Overland Park, KS 2×19×317 Posts	Karsten, k=255 was already tested to n=2M. See this post: https://mersenneforum.org/showpost.p...&postcount=901 See the final post in this thread: https://mersenneforum.org/showthread.php?t=16883 See the old Riesellist page: http://kosmaj.sakura.ne.jp/rps/riesellist.html Your Wiki page only has it tested to n=1.07M. I will keep it reserved to n=2M as a complete doublecheck.

2021-02-13, 01:24	#1009
Chaos13 Mar 2010 2²×3 Posts	Gary- responded to you privately. Thanks for reaching out.

2021-02-13, 01:50	#1011
gd_barnes "Gary" May 2007 Overland Park, KS 2·19·317 Posts	Status on follow ups: I got a PM response from Chaos. He is going to keep k=213. I have asked him to report his search depth here. He has reported several top-5000 primes for n>2M. I let him know my intent to doublecheck the k up to n=2M so I won't be doing anything that he hasn't already done. No response on k=221. The last reported status at n=1.85M. I'm currently in the process of doublecheking n=1M-1.85M and will complete it to n=2M. Shanecruise responded and is fine with me taking k=285. The last reported status is at n=1.64M. I will doublecheck n=1M-1.64M and will complete to n=2M. Work will begin after k=221. After finding in the threads in several places that the search depth for k=255 is already at n=2M I did not follow-up with Kosmaj. I would not be stepping on any toes doing a doublecheck up to n=2M.

2021-02-13, 05:49	#1012
VBCurtis "Curtis" Feb 2005 Riverside, CA 5²×229 Posts	Gary- She. I haven't talked to sjtjung in a year or so; this is a good excuse for me to reach out to him. He was a student of mine fifteen years ago. I doubt he's still searching 221, but he's more likely still going on k=31.