mersenneforum.org Riesel Primes k*2^n-1, k<300 [Part II]
 User Name Remember Me? Password
 Register FAQ Search Today's Posts Mark Forums Read

2021-07-24, 00:03   #1035
ryanp

Jun 2012
Boulder, CO

1010110002 Posts

Quote:
 Originally Posted by gd_barnes k=7 is complete to n=5M; double-check is complete for n=1M-4.23M. No primes found for n=1M-5M. The k is released. Results attached. This is likely the longest currently running n-range without a prime for k<300.
I'm taking k=7 from n=5M to n=8M. Already found a hit.

2021-07-24, 21:37   #1036
gd_barnes

May 2007
Kansas; USA

2×3×5×353 Posts

k=21 is complete to n=3.5M; 1 prime found for n=2.89M-3.5M.

k=21 double-check is complete for n=1M-2.89M; 5 primes confirmed.

The k is released. Primes and results attached.
Attached Files
 prime-riesel-base2-k21-1M-3.5M.txt (368 Bytes, 72 views) results-riesel-base2-k21-1M-3.5M.zip (1.15 MB, 80 views)

 2021-07-27, 21:52 #1037 japelprime     "Erling B." Dec 2005 7·13 Posts k=83 at n=3.6M and continuing
 2021-09-09, 15:30 #1038 Trilo     "W. Byerly" Aug 2013 81*2^2797443-1 11510 Posts k=55 at n=3.45m.
 2021-09-27, 15:30 #1039 Trilo     "W. Byerly" Aug 2013 81*2^2797443-1 5×23 Posts Reserving k=21 from 3.5m Building a new computer (Ryzen 5950x) on Friday excited to get it crunching!
 2021-10-01, 11:50 #1040 kuratkull     Mar 2007 Estonia 149 Posts ongoing progress report: k=193 at n=5M k=195 at n=5M k=197 at n=5M
 2021-10-21, 23:53 #1041 Trilo     "W. Byerly" Aug 2013 81*2^2797443-1 5×23 Posts In contact with ryanp as it seems he was working on k=21 before me. Reserving k= 81 instead.
2021-10-21, 23:58   #1042
diep

Sep 2006
The Netherlands

2·17·23 Posts

Quote:
 Originally Posted by Trilo In contact with ryanp as it seems he was working on k=21 before me. Reserving k= 81 instead.
k=81 might be a good one! Good luck! (had told Paul to jump on it - too late now!)

Last fiddled with by diep on 2021-10-21 at 23:59

2021-10-22, 02:11   #1043
Trilo

"W. Byerly"
Aug 2013
81*2^2797443-1

5×23 Posts

after speaking with ryanp he completed k= 21 from n=6-7m. I'll keep k=21 reserved along with k=81.

k=55 at n= 3.52m.

Quote:
 Originally Posted by diep k=81 might be a good one! Good luck! (had told Paul to jump on it - too late now!)
Only time will tell ;)

Last fiddled with by Trilo on 2021-10-22 at 02:17

 2021-11-11, 01:08 #1044 unconnected     May 2009 Russia, Moscow 22·673 Posts Status update: k=29 @ 7M k=253 @ 6.2M
 2021-11-14, 12:11 #1045 japelprime     "Erling B." Dec 2005 7·13 Posts k=83 at n=3.7M and continuing.

 Thread Tools

 Similar Threads Thread Thread Starter Forum Replies Last Post KEP Conjectures 'R Us 1130 2021-12-16 04:43 lukerichards Number Theory Discussion Group 7 2018-01-20 16:47 Primeinator Information & Answers 12 2009-07-19 23:30 robert44444uk Sierpinski/Riesel Base 5 358 2008-12-08 16:28 SlashDude 15k Search 3 2004-06-14 16:07

All times are UTC. The time now is 19:10.

Tue Jan 18 19:10:59 UTC 2022 up 179 days, 13:39, 0 users, load averages: 1.65, 1.69, 1.84

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.

≠ ± ∓ ÷ × · − √ ‰ ⊗ ⊕ ⊖ ⊘ ⊙ ≤ ≥ ≦ ≧ ≨ ≩ ≺ ≻ ≼ ≽ ⊏ ⊐ ⊑ ⊒ ² ³ °
∠ ∟ ° ≅ ~ ‖ ⟂ ⫛
≡ ≜ ≈ ∝ ∞ ≪ ≫ ⌊⌋ ⌈⌉ ∘ ∏ ∐ ∑ ∧ ∨ ∩ ∪ ⨀ ⊕ ⊗ 𝖕 𝖖 𝖗 ⊲ ⊳
∅ ∖ ∁ ↦ ↣ ∩ ∪ ⊆ ⊂ ⊄ ⊊ ⊇ ⊃ ⊅ ⊋ ⊖ ∈ ∉ ∋ ∌ ℕ ℤ ℚ ℝ ℂ ℵ ℶ ℷ ℸ 𝓟
¬ ∨ ∧ ⊕ → ← ⇒ ⇐ ⇔ ∀ ∃ ∄ ∴ ∵ ⊤ ⊥ ⊢ ⊨ ⫤ ⊣ … ⋯ ⋮ ⋰ ⋱
∫ ∬ ∭ ∮ ∯ ∰ ∇ ∆ δ ∂ ℱ ℒ ℓ
𝛢𝛼 𝛣𝛽 𝛤𝛾 𝛥𝛿 𝛦𝜀𝜖 𝛧𝜁 𝛨𝜂 𝛩𝜃𝜗 𝛪𝜄 𝛫𝜅 𝛬𝜆 𝛭𝜇 𝛮𝜈 𝛯𝜉 𝛰𝜊 𝛱𝜋 𝛲𝜌 𝛴𝜎 𝛵𝜏 𝛶𝜐 𝛷𝜙𝜑 𝛸𝜒 𝛹𝜓 𝛺𝜔