Challenge: sum of squares. Let's break 299
01-27-2018, 01:23 PM (This post was last modified: 01-27-2018 01:24 PM by pier4r.)
Post: #51
 pier4r Senior Member Posts: 2,056 Joined: Nov 2014
RE: Challenge: sum of squares. Let's break 299
(01-26-2018 10:01 PM)Allen Wrote:  I found a speed up and can now calculate N=1000 solution in under 20 seconds.
N=2000 takes <3 min

I hope you share your findings somewhere (git repositories, articles on some magazines or journals, your blog, etc.). If something is new or relatively new, that is few know how to use it, it is a pity to not share it because it may be lost until someone else with same abilities looks into the topic.

I always remember the middle square "random" procedure.

Discovered in ~1950 and recorded in a journal. It was already recorded in ~1930 and in ~1250 (yes, twelfth hundred fifty) . I wondered how many times it was independently discovered until the knowledge of the procedure was more widespread after 1950. Now reinventing the wheel because one wants to is all ok, reinventing the wheel because all the previous one got lost is a necessity (there are no wheels) but also a pity (no one cares about leaving the wheels survive).

Wikis are great, Contribute :)
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 Messages In This Thread Challenge: sum of squares. Let's break 299 - pier4r - 01-18-2018, 09:32 PM RE: Challenge: sum of squares. Let's break 299 - TheKaneB - 01-18-2018, 10:58 PM RE: Challenge: sum of squares. Let's break 299 - Didier Lachieze - 01-19-2018, 12:08 AM RE: Challenge: sum of squares. Let's break 299 - Didier Lachieze - 01-19-2018, 12:15 PM RE: Challenge: sum of squares. Let's break 299 - Paul Dale - 01-19-2018, 04:29 AM RE: Challenge: sum of squares. Let's break 299 - Thomas Okken - 01-20-2018, 05:43 PM RE: Challenge: sum of squares. Let's break 299 - John Keith - 01-20-2018, 08:19 PM RE: Challenge: sum of squares. Let's break 299 - Paul Dale - 01-20-2018, 10:13 PM RE: Challenge: sum of squares. Let's break 299 - Thomas Okken - 01-20-2018, 10:31 PM RE: Challenge: sum of squares. Let's break 299 - Allen - 01-25-2018, 02:17 AM RE: Challenge: sum of squares. Let's break 299 - Thomas Okken - 01-19-2018, 04:29 AM RE: Challenge: sum of squares. Let's break 299 - Paul Dale - 01-19-2018, 06:31 AM RE: Challenge: sum of squares. Let's break 299 - Thomas Okken - 01-19-2018, 06:48 AM RE: Challenge: sum of squares. Let's break 299 - pier4r - 01-19-2018, 12:40 PM RE: Challenge: sum of squares. Let's break 299 - Didier Lachieze - 01-19-2018, 12:47 PM RE: Challenge: sum of squares. Let's break 299 - Didier Lachieze - 01-19-2018, 04:26 PM RE: Challenge: sum of squares. Let's break 299 - Thomas Okken - 01-19-2018, 04:33 PM RE: Challenge: sum of squares. Let's break 299 - Didier Lachieze - 01-19-2018, 04:56 PM RE: Challenge: sum of squares. Let's break 299 - ggauny@live.fr - 01-20-2018, 06:15 PM RE: Challenge: sum of squares. Let's break 299 - Thomas Okken - 01-20-2018, 09:08 PM RE: Challenge: sum of squares. Let's break 299 - Thomas Okken - 01-21-2018, 05:41 AM RE: Challenge: sum of squares. Let's break 299 - Gilles59 - 01-21-2018, 10:44 PM RE: Challenge: sum of squares. Let's break 299 - Thomas Okken - 01-22-2018, 01:40 AM RE: Challenge: sum of squares. Let's break 299 - TheKaneB - 01-22-2018, 11:54 AM RE: Challenge: sum of squares. Let's break 299 - Thomas Okken - 01-22-2018, 01:11 PM RE: Challenge: sum of squares. Let's break 299 - TheKaneB - 01-22-2018, 03:19 PM RE: Challenge: sum of squares. Let's break 299 - Gilles59 - 01-22-2018, 08:49 PM RE: Challenge: sum of squares. Let's break 299 - Allen - 01-24-2018, 09:18 PM RE: Challenge: sum of squares. Let's break 299 - Thomas Okken - 01-24-2018, 09:43 PM RE: Challenge: sum of squares. Let's break 299 - Allen - 01-24-2018, 10:03 PM RE: Challenge: sum of squares. Let's break 299 - Allen - 01-24-2018, 10:08 PM RE: Challenge: sum of squares. Let's break 299 - Allen - 01-24-2018, 10:14 PM RE: Challenge: sum of squares. Let's break 299 - Thomas Okken - 01-24-2018, 10:16 PM RE: Challenge: sum of squares. Let's break 299 - TheKaneB - 01-24-2018, 10:22 PM RE: Challenge: sum of squares. Let's break 299 - Allen - 01-24-2018, 10:29 PM RE: Challenge: sum of squares. Let's break 299 - pier4r - 01-25-2018, 05:54 PM RE: Challenge: sum of squares. Let's break 299 - Allen - 01-24-2018, 10:32 PM RE: Challenge: sum of squares. Let's break 299 - Thomas Okken - 01-24-2018, 10:33 PM RE: Challenge: sum of squares. Let's break 299 - Allen - 01-25-2018, 01:47 AM RE: Challenge: sum of squares. Let's break 299 - Allen - 01-25-2018, 01:49 AM RE: Challenge: sum of squares. Let's break 299 - Allen - 01-25-2018, 01:55 AM RE: Challenge: sum of squares. Let's break 299 - Allen - 01-25-2018, 02:04 AM RE: Challenge: sum of squares. Let's break 299 - Allen - 01-25-2018, 03:25 AM RE: Challenge: sum of squares. Let's break 299 - Allen - 01-25-2018, 04:19 AM RE: Challenge: sum of squares. Let's break 299 - TheKaneB - 01-25-2018, 09:33 AM RE: Challenge: sum of squares. Let's break 299 - Allen - 01-25-2018, 10:53 AM RE: Challenge: sum of squares. Let's break 299 - Allen - 01-25-2018, 11:10 PM RE: Challenge: sum of squares. Let's break 299 - TheKaneB - 01-26-2018, 12:29 AM RE: Challenge: sum of squares. Let's break 299 - pier4r - 01-26-2018, 08:15 PM RE: Challenge: sum of squares. Let's break 299 - Allen - 01-26-2018, 10:01 PM RE: Challenge: sum of squares. Let's break 299 - pier4r - 01-27-2018 01:23 PM RE: Challenge: sum of squares. Let's break 299 - Massimo Gnerucci - 01-27-2018, 02:14 PM RE: Challenge: sum of squares. Let's break 299 - Allen - 01-28-2018, 04:14 PM RE: Challenge: sum of squares. Let's break 299 - brickviking - 01-29-2018, 07:13 PM RE: Challenge: sum of squares. Let's break 299 - peacecalc - 01-30-2018, 02:51 PM RE: Challenge: sum of squares. Let's break 299 - Allen - 02-01-2018, 03:38 AM RE: Challenge: sum of squares. Let's break 299 - Allen - 02-01-2018, 03:40 AM RE: Challenge: sum of squares. Let's break 299 - TheKaneB - 02-01-2018, 10:54 AM

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