New #prime dweets

function u(t) {

c.width=1920 // clear the canvas
for(i=0;i<9;i++)
x.fillRect(400+i*100+S(t)*300,400,50,200) // draw 50x200 rects

} // 122/140

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    u(t) is called 60 times per second.
    t: Elapsed time in seconds.
    S: Shorthand for Math.sin.
    C: Shorthand for Math.cos.
    T: Shorthand for Math.tan.
    R: Function that generates rgba-strings, usage ex.: R(255, 255, 255, 0.5)
    c: A 1920x1080 canvas.
    x: A 2D context for that canvas.

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taupelink

remix of d/14804 by u/taupelink

function u(t) {

f=X=>{for(i=2;i*i<=X;i++)if(X%i==0)return i+'*'+f(X/i);return X};frame%30||(c.width=200,q=f(k=Math.random()*1e9|0),x.fillText(k+'='+q,5,60))

Aug 11 2019 12:34 AM UTC

}// 140/140

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Factorization of a random integer into #prime products

u/aleamb

awesome! #math #numbers #primes

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taupelink

function u(t) {

c.width|=0;f=X=>{for(i=2;i*i<=X;i++)if(X%i==0)return i+'*'+f(X/i);return X};k=frame/6|0;x.font='5em"';x.fillText(k+'='+f(k),0,540)

Jun 28 2019 1:01 AM UTC

}// 130/140

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factorization into #prime products. #math

u/taupelink

simple #recursion #recursive
u/Xen

very clever
u/katkip

wow
u/donbright

#numbertheory

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katkip

remix of d/9384 by u/katkip

function u(t) {

eval(unescape(escape`⁦畮捴楯渠昨温筩昨渼〩牥瑵牮‭ㄻ敬獥⁩昨渽㴰⥲整畲渠ㄻ敬獥筲整畲渨渪昨渭ㄩ⤻絽⁦畮捴楯渠瀨温筲整畲渠䵡瑨⹦汯潲⠨昨温┨渫ㄩ⤯渪⡮ⴱ⤩⬲絣⹷楤瑨㴲㔻砮晩汬呥硴⡰⡾繴⤬㈬㄰⤻`.replace(/u(..)/g,"$1%")))

Aug 23 2018 2:05 PM UTC

}// 133/140

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Wilson's theorem. #prime #primes

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katkip

function u(t) {

function p(n){return n**2-n+41}
c.width=25
x.fillText(p(~~t),2,10)

Aug 23 2018 1:56 PM UTC

}// 66/140

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#prime #counter

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firegodjr

remix of d/8942 by u/firegodjr

function u(t) {

F=n=>{for(i=2;i<n;)n=n%i++==0?0:n;return n>1}
x.drawImage(c,0,l=10)
for(j=214;j--;)x.fillStyle=F(j^t*60)?"#f00":"#000",x.fillRect(j*l,0,l,l)

Jul 27 2018 6:06 PM UTC

}// 140/140

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Further optimized the is_prime (F) function. How far can you scroll before timeout? :D #prime

u/fujimotos

It's kinda surprising that the distribution of prime numbers has such a noticeable pattern.
u/firegodjr

Well, primes are still technically pseudorandom. They don't form a noticeable pattern, per se. This algorithm would possibly work with any consistent pseudorandom number generator, but this pattern is uniquely made up of prime number interactions.
u/lionleaf

Well, non-prime numbers definitely have a pattern that I would expect helps making this very beatiful. For instance ever other number is not prime (even), every 5 number, every 7 number etc. So lot's of regularities.
u/fujimotos

Yeah. I see Math.random() > 0.5 produces a pettern looking nothing but garbled noise. In comparison, the one generated by prime numbers is a Persian carpet.

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firegodjr

remix of d/8941 by u/firegodjr

function u(t) {

if(!t)c.width=400,v=0
F=n=>{for(i=n;i-->2;)n=n%i==0?0:n;return n>1}
v++
for(j=400;j--;)F(j^v)?x.fillRect(j,v,1,1):0

Jul 26 2018 9:21 PM UTC

}// 115/140

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This is your brain on bitcoins. #prime

u/DataMeta

Good stuff. I see the death star trench
u/fujimotos

#scanline
u/fujimotos

#slow_render

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firegodjr

function u(t) {

F=n=>{for(i=n;i-->2;)n=n%i==0?0:n;return n>1}
x.font="5em x"
x.fillStyle=R(F(X=t|0)?255:0) 
x.fillText(X,X%9*90+550,X*10+90)

Jul 26 2018 7:35 PM UTC

}// 124/140

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Little prime generator :P

u/Xen

wow! very nice
u/firegodjr

Thanks! :D #prime

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gazbor

function u(t) {

for(i=3,n=t|0;n;i++){for(d=2;i%d&&d!=i;d++);d^i||n--}c.width=2e3;x.font="20em t";x.fillText(i-1,810,500)

Feb 19 2017 12:44 AM UTC

}// 104/140

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Prime numbers

u/iverjo

#prime

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Froff

function u(t) {

function v(a){for(;a>1;a--){for(s=0,j=2;j<a;)s+=a%j++?0:1;if(!s)return a}}c.width=600;x.font="99px s";x.fillText(v(Math.floor(9*t+2)),99,99)

May 2 2016 9:38 AM UTC

}// 140/140

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