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Author Topic: [TI-Planet Contest] Heat up your calc with arithmetic !  (Read 23850 times)

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Offline compu

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Re: [TI-Planet Contest] Heat up your calc with arithmetic !
« Reply #30 on: April 07, 2013, 04:44:12 pm »
The last row is the latest version of the program. The columns show the time in seconds to calculate the n-th (22, 150, 50, 250) palindromic prime on a classic CAS OS or the student software.
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Offline sammyMaX

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Re: [TI-Planet Contest] Heat up your calc with arithmetic !
« Reply #31 on: April 07, 2013, 06:53:17 pm »
Ah, I see. The computer software is not an exact emulator then, and it runs faster?

I made my program in the Nspire emulator. Is there any way to extract the TNS file from the emulator? Right now, there is only a saved flash image.
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Offline Dapianokid

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Re: [TI-Planet Contest] Heat up your calc with arithmetic !
« Reply #32 on: April 07, 2013, 08:39:03 pm »
Quote from: Xeda112358 on April 07, 2013, 11:36:40 am
Dapianokid said his took 11 seconds to compute the 42nd prime palindrome, but from the conversation, he may have a much more efficient algorithm for larger values. I think his was also running at 150MHz, so I am not sure.

Has anybody set any benchmarks for other languages?

I was running at 264MHz. Also, mine exponentially gets slower with bigger numbers,
so I'm rewriting it to be roughly the same for all possible Nspire values.
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Offline Xeda112358

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Re: [TI-Planet Contest] Heat up your calc with arithmetic !
« Reply #33 on: April 09, 2013, 02:07:47 pm »
I refined my algorithm for prime testing. Now my current speeds are:
42nd palprime : 22 seconds, 18181
100th palprime : 84 seconds, 94049
290th palprime : 552 seconds, 1958591

Yesterday, my record for the 290th was something like 682 seconds, so it improved by 130 seconds o_o My new algorithm will prove exponentially faster (I believe) for larger values.
EDIT: Again, TI-BASIC, z80 on a TI-84+
« Last Edit: April 09, 2013, 02:08:14 pm by Xeda112358 »
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Offline Streetwalrus

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Re: [TI-Planet Contest] Heat up your calc with arithmetic !
« Reply #34 on: April 09, 2013, 04:01:34 pm »
Are we allowed to use 15mhz in axe/asm ? :devil:
Also 32 bit math in ASM isn't very hard so we can get pretty large values (the biggest 32 bit palindrome is 4 294 994 924). Means that BASIC will be slower but in ASM we get numbers a bit smaller.
I'm trying my hand at axe right now to see how feasible it is. Then I'll introduce some ASM for 32 bit stuff. ;D I'm not Runer though. :P

And since ASM will be so fast that we can't stopwatch it, I believe that cycles will be counted ?
« Last Edit: April 09, 2013, 04:13:56 pm by Streetwalker »
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Offline Dapianokid

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Re: [TI-Planet Contest] Heat up your calc with arithmetic !
« Reply #35 on: April 09, 2013, 06:07:21 pm »
Streetwalker, I do'nt believe it will be that fast when you test out much larger numbers like 1777771.
I refined mine and the size does not matter, and I invented a new algorithm for primality!
Average time: .028 seconds per digit.
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Offline Xeda112358

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Re: [TI-Planet Contest] Heat up your calc with arithmetic !
« Reply #36 on: April 09, 2013, 06:10:18 pm »
I did a rough estimate and I think that z80 assembly with 32-bit stuff ought to go through 300 palindromes per second at 6MHz.

Also, I wonder what your method is? >:D
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Offline DrDnar

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Re: [TI-Planet Contest] Heat up your calc with arithmetic !
« Reply #37 on: April 09, 2013, 09:23:40 pm »
I prefer to heat up my calculator with overclocking.
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Offline Streetwalrus

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Re: [TI-Planet Contest] Heat up your calc with arithmetic !
« Reply #38 on: April 10, 2013, 02:16:21 am »
Lol I'm currently using the exact same algorithm as in BASIC and now it takes 4.5 secs to find the 1000th prime (15mhz Axe). :P
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Offline Nick

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Re: [TI-Planet Contest] Heat up your calc with arithmetic !
« Reply #39 on: April 10, 2013, 03:21:05 am »
Dammit, I hate it to hear you guys just throwing those tiny numbers at my face, while I'm just sitting here, wondering how to even start :)
Good luck, seems like there'll be a lot of competition around here...
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Offline Adriweb

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Re: [TI-Planet Contest] Heat up your calc with arithmetic !
« Reply #40 on: April 10, 2013, 03:41:22 am »
Quote from: Streetwalker on April 10, 2013, 02:16:21 am
Lol I'm currently using the exact same algorithm as in BASIC and now it takes 4.5 secs to find the 1000th prime (15mhz Axe). :P
But palindromic too ? :P
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Offline Streetwalrus

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Re: [TI-Planet Contest] Heat up your calc with arithmetic !
« Reply #41 on: April 10, 2013, 04:28:00 am »
Nope just regular old boring primes. Result is 7919. I'm thinking of a good way to make palindromes. Are binary ones allowed ? :P
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Offline TIfanx1999

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Re: [TI-Planet Contest] Heat up your calc with arithmetic !
« Reply #42 on: April 10, 2013, 05:14:22 am »
Although I don't see mention of it, the first post list all its examples in decimal. Judging by that, I'd say that they want the output in decimal format.
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Offline Xeda112358

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Re: [TI-Planet Contest] Heat up your calc with arithmetic !
« Reply #43 on: April 10, 2013, 06:16:57 am »
So, my calculation of "300 per second" was off by quite a bit. I forgot to calculate in non-primes and the wasted cycles there :P I only get about 30 primes per second, but my algorithm could be better refined XD

(And this is at 6MHz)
« Last Edit: April 10, 2013, 06:17:10 am by Xeda112358 »
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Offline Streetwalrus

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Re: [TI-Planet Contest] Heat up your calc with arithmetic !
« Reply #44 on: April 10, 2013, 06:58:24 am »
Quote from: Art_of_camelot on April 10, 2013, 05:14:22 am
Although I don't see mention of it, the first post list all its examples in decimal. Judging by that, I'd say that they want the output in decimal format.
I understand this, what I was asking was if we were allowed to use numbers that are palindromes in binary but that was just a joke. :P
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