Top #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

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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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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joe.m

remix of d/15861 by u/joe.m

function u(t) {

if(!t){for(i=n=2601;i--;u[i]=1)q=1;j=q*q}
if(u[q-1]&j<n){u[j-1]=0;x.fillRect(37*((j-1)%51),21*((j-1)/51|0),35,19);j+=q}else{q++;j=q*q}

Oct 1 2019 8:51 AM UTC

}// 134/140

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pavel, this one is for you #prime #sieve

u/pavel

nice 👍
u/username

#waitforit

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joe.m

remix of d/16019 by u/joe.m

function u(t) {

if(!t){r=1,d=100}
for(z=d;z--;){
r++
n=0
for(i=r**.5|0;i>1&&n==0;i--)if((r/i)==(r/i|0))n=1
if(!n) x.fillRect(960+r/d*C(r),540+r/d*S(r),4,4)}

Oct 11 2019 9:48 AM UTC

}// 140/140

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now with a (slightly) less rubbish #prime test

u/pavel

91 for(d=z=99;z--;i||x.fillRect(960+r/d*C(r),540+r/d*S(r),4,4))for(r=t&&r+1,i=r**.5|0;r%i--;);
u/katkip

u used 3blue1brown video

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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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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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Ghoust

function u(t) {

c.width*=1
for(j=500;j;j--){a=Math.floor(t*300)+j
for(i=a;i>a-99;i--){i/a==Math.floor(i/a)?x.fillRect(960+S(a)*j*1.5,540+C(a)*j*1.5,9,9):0}}

Jul 29 2022 10:23 AM UTC

}// 140/140

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Prime Number Spiral

u/384.cz

#prime

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DaSpider

remix of d/21407 by u/DaSpider

function u(t) {

t?1:n=3
for(j=50;j--;n=2+n){p=1
for(k=3;k<=n**.5;k++)(n%k)||(p=0)
x.fillStyle=R(m=255*!p,m,m)
x.fillRect((n%100)*18,(n/50|0)%1e3,19,2)}

Jan 28 2021 9:55 PM UTC

}// 135/140

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Prime number distribution

u/smtsjhr

this seems interesting but i cant quite make sense of it. its like a puzzle and im dumb
u/DaSpider

#Prime
u/DaSpider

#primes

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DaSpider

remix of d/21347 by u/Qwitter

function u(t) {

t?n++:(document.write(`Prime Numbers`),n=2)
p=1;for(k=2;k<=n**.5;k++)(n%k)||(p=0)
document.write((p?`, `+n:``))

Jan 23 2021 6:55 PM UTC

}// 111/140

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