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Talk:Ulam numbers: Difference between revisions
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== timings for the N<sup>th</sup> Ulam number ==
Using the (new and current) REXX program, the times:
It (the REXX program) is an '''O(2)''' polynomial
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(The above, as measured and timed on Paul Kislanko's <strike>10-core</strike> 8-core PC. -- [[User:Gerard Schildberger|Gerard Schildberger]] ([[User talk:Gerard Schildberger|talk]]) 21:38, 4 December 2020 (UTC)
:what, pray tell, is "Paul Kislanko's 10-core PC"? --[[User:Petelomax|Pete Lomax]] ([[User talk:Petelomax|talk]]) 01:12, 5 December 2020 (UTC)
:: I made a mistoke, it is an '''8'''-core PC.
:: By the way, Paul Kislanko (an old-timer) is the proud owner of that fast PC, and he is gracious enough to run some of my long-running REXX programs on occasion. With 16 Gbytes and plenty of CPU engines, Paul doesn't even notice what's going on in the back room (or basement?) of his PC. -- [[User:Gerard Schildberger|Gerard Schildberger]] ([[User talk:Gerard Schildberger|talk]]) 02:46, 5 December 2020 (UTC)
Here are the specs:
OS Name Microsoft Windows 10 Pro
Version 10.0.19041 Build 19041
Other OS Description Not Available
OS Manufacturer Microsoft Corporation
System Manufacturer LENOVO
System Model 90L1007AUS
System Type x64-based PC
System SKU LENOVO_MT_90L1_BU_LENOVO_FM_IdeaCentre T540-15ICB G
Processor Intel(R) Core(TM) i7-9700 CPU @ 3.00GHz, 3000 Mhz, 8
Core(s), 8 Logical Processor(s)
Installed Physical Memory (RAM) 16.0 GB
Total Physical Memory 15.9 GB
Hyper-V - Second Level Address Translation Extensions Yes
Hyper-V - Virtualization Enabled in Firmware Yes
Hyper-V - Data Execution Protection Yes
::::::::::::::::::::::::: -- [[User:Gerard Schildberger|Gerard Schildberger]] ([[User talk:Gerard Schildberger|talk]]) 01:48, 5 December 2020 (UTC)
More info on that 8-core PC:
The "base" clock speed is 3.00 GHz, but it has a "turbo" mode (overclocking?) or
something like that to get to a max of 4.70 GHz.
9th Generation IntelR CoreT i7-9700 Processor with vProT (3.0 GHz, up to
4.70 GHz with Turbo Boost, 8 Cores, 8 Threads, 12 MB Cache)
So, it's sure is a barn-burner, by gum. Plus it has a solid-state paging
hard-drive (built-in) -- [[User:Gerard Schildberger|Gerard Schildberger]] ([[User talk:Gerard Schildberger|talk]]) 02:46, 5 December 2020 (UTC)
== timing for the 100,000<sup>th</sup> Ulam number ==
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:It certainly demonstrates the importance of using a decent algorithm.
::::: Yuppers, ya can say that again. -- [[User:Gerard Schildberger|Gerard Schildberger]] ([[User talk:Gerard Schildberger|talk]]) 21:39, 4 December 2020 (UTC)
:I was quite pleased with my first version but it's been trumped twice now by the Phix and XPL0 algorithms! --[[User:PureFox|PureFox]] ([[User talk:PureFox|talk]]) 21:36, 4 December 2020 (UTC)
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