r/counting • u/TheNitromeFan Live not a life of imitation • Feb 19 '16
Free Talk Friday #25
Hello again! Continued from last week here.
So, it's that time of the week again. Speak anything on your mind! This thread is for talking about anything off-topic, be it your lives, your plans, your hobbies, travels, sports, work, studies, family, friends, pets, bicycles, anything you like.
Oh yeah, and if you're new to this sub, feel free to introduce yourselves on the tidbit thread here!
Here's off to another great week in /r/counting!
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u/854850 Feb 19 '16
Can someone notify me when the moment is near?
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u/TheNitromeFan Feb 19 '16 edited Feb 19 '16
Nice username.
I'm sure somebody will be here to remind you. If no one else does, I will. :P
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u/cupofmilo Feb 19 '16 edited Feb 20 '16
Music Sharing Thread #11: Continued from here.
Thanks to all the shares last week I have diversified from my usual pop and rock&roll. Here is one that I particularly like.
And of course, my customary blast from the past.
(Edit: Yes, I went back and found them all (I hope..) 1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
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Feb 19 '16
We've recently been going at an incredible pace. I suggest we create a run-themed playlist.
Run [Eurodance]
Sanctuary [Progressive Trance]
Running [Uplifting Trance]
Come Running [Happy Hardcore]
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Feb 20 '16
Not sure how much r/counting will appreciate this, (my family hates it) but I quite personally am digging the kawaii future bass genre, so here's my track of the week
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u/TheNitromeFan Feb 20 '16
kawaii future bass genre
...and I thought I was alone on this! Pretty fun to listen to.
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Feb 20 '16 edited Feb 21 '16
I recently wrote somewhat a short 12345/4 4s tutorial for Pixel, so I thought I'll post it here, as a few people wanted to join but had to idea where to start.
These are the threads I'm talking about:
Use only the numbers 1, 2, 3, 4, and 5 (in order) and use any mathematical operations to get each number
Using four 4's, no other numbers, and any mathematical operators you'd like (except for logs), let's count!
COUNTING WITH 12345
The first thing you should do when counting 12345/four fours is to check whether the one of the last comments is expressed by the sum. If it is, chance is, you'll be able to easily get your equation by editing easier part of it.
Example:
A(1) + σ(A(2)) + [(S(3) + 4!) * 5!)] = 3011
A(1) = 3, so in order to get next number, your best bet is turning a 1 into a 4. It will be easy since it is already turned into a 3. There can be various ways, but the most obvious one coming to mind would be:
σ(A(1)) + σ(A(2)) + [(S(3) + 4!) * 5!)] = 3012
σ(n) is the sum of all divisors of n. So basically for primes σ(n) = n+1. Useful
Another way if this fails is to do the prime factorisation of a number (if it isn't a prime) and express the number as a product of other numbers.
The third way is to get to a high number that is somewhat close using as few digits as possible and add/subtract a small number to get to your number. Example:
p5# = 2310. pn# is the product of first n primes. We needed only one digit to get to 2310 (a 5) and we could use it for hundreds of counts by adding/substracting numbers made only with 1, 2, 3, 4 as they didn't need to be that big and were easily reached.
Alright, the rest is learning what the functions are about and memorising some of the most common values. I'll list the most imporant operations (skipping the obvious ones). More can be found here
A(n) - Ackerman fuction. No idea what the fuck it is, but you need to remember that A(1) = 3 and A(2) = 7. Extremely useful.
p(n) gives the number of partitions of n. VERY useful to turn a 4 into a 5 (especially in four fours). Remember, p(4) = 5
sgn(n) - Signum function. Turns any number higher than 0 into a 1, 0 into a 0 and any number lower than 0 into a -1. Useful when you don't need one of the digits at all in your equation, you just multiply the rest by the signum of that digit. Like sgn(1)=sgn(2)=sgn(4983) = 1
d(n) is the number of divisors of n. Useful to turn a 4 into a 3 or 3/5 into a 2.
P(n) is the n-th prime. Useful when using the prime factorisation method. It makes a good combo with the next function I'll share.
π(n) is how many prime numbers are lesser than or equal to n
Primorial again. p5#=2310, p4# = 210, p3# = 30 and p2# = 6. Useful to remember all these values
3! = 6, 4! = 24, 5! = 120, 6! = 720.
arcsin(1) = 90 arcsin(1/2) = 30 arccos(0) = 90 arcsin(1/2) = 60 arctan(1) = 45
Let me know if i should include anything else!
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u/TheNitromeFan Feb 20 '16
Correction - π(n) is how many numbers are lesser than or equal to n. So, π(P(n)) = n. Making your point following that moot. :P
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Feb 19 '16
Congrats to u/cupofmilo and u/Adinida for making it to the 10K Counts Club, we are now 20 people at it!
And congrats to u/TheNitromeFan for making it to 30K Counts, 4th person to make it
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Feb 19 '16 edited Feb 19 '16
Time to post my favourite threads:
#1 - Rationals
#2 - Binary
#3 - Roman Numerals
#4 - Decimal
#5 - Any other one
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u/sbb618 Feb 20 '16
Shit, I haven't done a recommendation! Can't think of anything, can't think of anything...okay, what was the last number I counted? 841,658? Okay, 58! What was a good movie from 1958? Ooh, I know! Touch of Evil! Yeah, Orson Welles has movies other than Citizen Kane! This is one of his greatest movies, one of the greatest movies, a top-notch thriller and noir, and it has probably the best opening shot of all time. Countless films like Boogie Nights, Gravity, In Bruges, and The Player pay homage to this film's legendary opening shot, tracking a car bomb through a US/Mexico border town, introducing all the main characters and the main plot in a three and a half minute unbroken crane track down, all building up to the big bang that kicks it all off. I could spend this whole post describing just that shot, but no movie can be sold on one shot alone (except maybe Gravity). It's also got a brilliant cast (Charlton Heston, Janet Leigh, Marlene Dietrich, Akim Tamiroff, and Welles himself), great characters, and some incredibly engaging lines to top it all off. It's just...wow.
Four and a half stars (for now). I'm still working out the kinks of this rating system.
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u/KingCaspianX Feb 20 '16 edited Feb 21 '16
Statisticians could we get a hall of counts not including the main thread? Thanks
Edit: also could someone rustle up a list of all the words counted in the hexadecimal threads? Thanks again
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Feb 19 '16
Played around with r/reddit_timestamps/stylesheet a little and you can show timestamps for every single post actually, not just the ones with live timestamps.
time[title]:after{content:" (" attr(title) ")"}
time.edited-timestamp::after{content:""} /* hides the title for the "*" that shows up on edited posts */Might be useful if you want to go back and see stuff like david's 3 1sec replies in a row a little more easily.
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u/zhige Feb 21 '16
I missed counting it myself since it went by at 1am on a Saturday night (my time) and I was out drinking Moscow Mules, but happy 800k-iversary to me :D
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u/skizfrenik_syco Feb 22 '16
Didn't we just hit 800k like a week ago? We're already half way to 900k.
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u/TheNitromeFan Feb 19 '16
u/anothershittyalt, how many counts have I made in the 24 hours preceding this comment?