Collatz in all languages in bytes. Achievements Cheevos Holes Languages Medals Miscellaneous All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Binary Lambda Calculus Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig 05AB1E ALGOL 68 APL ArkScript Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig Experimental Language 05AB1E ALGOL 68 APL ArkScript Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Hole All 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Apéry’s Constant Binary Lambda Calculus Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 954th NickTheEASDude 🇺🇸 849 63 12ms 18 Jan 2024 954th 823126 849 63 15ms 14 Nov 2024 954th Palladium02 849 63 10ms 12 May 2025 954th 4very 849 63 11ms 10 Jun 2025 954th Ultra814 849 63 10ms 21 Aug 2025 966th MeWhenI 🇻🇦 849 71 106ms 13 Dec 2022 967th Shanethegamer 🇺🇸 849 98 121ms 26 Oct 2022 967th emgordon154 849 98 119ms 18 Feb 2025 969th jared-hughes 849 100 58ms 20 Jul 2022 969th ZakkkkAttackkkk 🇵🇭 849 100 56ms 10 Aug 2022 969th Walter225 849 100 58ms 25 Jul 2023 972nd DialFrost 🇸🇬 848 66 89ms 7 Apr 2025 972nd KasperKivimaeki 🇫🇮 848 66 7ms 22 Dec 2025 974th SirBogman 🇺🇸 848 89 38ms 4 May 2022 975th MeWhenI 🇻🇦 848 164 1,639ms 7 Nov 2025 976th AdamHe17 847 73 21ms 31 May 2022 976th AliceFord 847 73 22ms 2 Jun 2022 976th Natanaelel 🇸🇪 847 73 16ms 16 Jun 2022 976th btjones0 847 73 24ms 21 Jun 2022 976th marcin7Cd 847 73 21ms 27 Jun 2022 976th tri1212 🇻🇳 847 73 21ms 18 Jul 2022 976th vhoulbreque 🇫🇷 847 73 20ms 18 Aug 2022 976th KatieLG 🇬🇧 847 73 20ms 29 Aug 2022 976th tkr-sh 🇰🇵 847 73 20ms 8 Sep 2022 976th jroscoe5 847 73 21ms 15 Sep 2022 976th fredrik-bakke 🇳🇴 847 73 19ms 18 Sep 2022 976th firegene 🇮🇪 847 73 23ms 27 Sep 2022 976th OhmNomNom 847 73 23ms 7 Oct 2022 976th 0-4849 847 73 21ms 1 Nov 2022 976th M0PKOBKA 847 73 25ms 19 Dec 2022 976th calumacutt 847 73 24ms 19 Dec 2022 976th thehylian 847 73 20ms 2 Jan 2023 976th fynnkroeger 847 73 22ms 6 Jan 2023 976th shellbertt 🇨🇦 847 73 20ms 13 Jan 2023 976th hunt-g 847 73 21ms 4 Feb 2023 976th ljweel 847 73 21ms 13 Feb 2023 976th jmerle 🇳🇱 847 73 22ms 16 Feb 2023 976th TaserTheFox 🇺🇸 847 73 20ms 14 Mar 2023 976th pinguicula 847 73 22ms 6 Apr 2023 976th TheoKeller1 847 73 24ms 11 Jun 2023 976th fkantelberg 847 73 19ms 16 Jul 2023 976th Mikey-Beep 🇬🇧 847 73 21ms 31 Aug 2023 976th eiburns 847 73 22ms 9 Oct 2023 976th htareque 847 73 21ms 13 Oct 2023 976th wearsunscreen 847 73 22ms 18 Oct 2023 976th Grrisly 847 73 20ms 10 Nov 2023 976th m42km 847 73 21ms 11 Nov 2023 976th GeneralPoxter 847 73 20ms 7 Dec 2023 976th logvp 847 73 24ms 12 Jan 2024 976th JoaoFelipe3 847 73 22ms 13 Jan 2024 976th ehulinsky 🇺🇸 847 73 21ms 16 Feb 2024 976th Lewenhaupt 847 73 22ms 23 Feb 2024 976th Yewzir 🇧🇪 847 73 20ms 5 Apr 2024 976th stertooy 🇧🇪 847 73 20ms 9 Jun 2024 976th cuboids 847 73 20ms 11 Jul 2024 976th jipsong 🇩🇪 847 73 21ms 23 Jul 2024 976th mattyhempstead 847 73 23ms 6 Oct 2024 976th wh3n3v3r 🇨🇿 847 73 23ms 18 Nov 2024 976th klixel 🇨🇦 847 73 21ms 18 Nov 2024 976th tjwrenn 847 73 20ms 10 Dec 2024 976th nullie 847 73 20ms 19 Dec 2024 976th maxgodfrey2004 🇨🇦 847 73 21ms 13 Feb 2025 976th lolgeny 847 73 19ms 22 Feb 2025 976th andrewjc2000 847 73 21ms 23 Feb 2025 976th Bulmenisaurus 847 73 23ms 2 Mar 2025 976th souta-1326 847 73 22ms 1 Apr 2025 976th BenjaminHGong 847 73 21ms 26 May 2025 976th FEZfan 🇦🇺 847 73 20ms 11 Jul 2025 976th wuduculfre 847 73 21ms 28 Jul 2025 976th BREMAUCY 🇫🇷 847 73 28ms 24 Aug 2025 976th FortuiteMan 🇫🇷 847 73 21ms 28 Sep 2025 976th miaoaixuan 847 73 22ms 30 Sep 2025 976th Lv0Sys 🇵🇱 847 73 25ms 7 Dec 2025 976th zacharysfrazee 847 73 21ms 11 Jan 2026 976th bpharaldsson 847 73 20ms 4 days ago 1,036th error256 847 81 68ms 13 Sep 2024 1,037th CLOStrophobic 🇮🇹 847 89 42ms 14 Feb 2025 1,038th bschorno 847 92 395ms 12 Oct 2022 1,038th ChrisTheisen 847 92 371ms 14 Dec 2022 1,038th kellantech 847 92 408ms 4 Jul 2023 First Prev 961–1,040 of 3,573 Next Last
NickTheEASDude
🇺🇸
823126
Palladium02
4very
Ultra814
MeWhenI
🇻🇦
Shanethegamer
🇺🇸
emgordon154
jared-hughes
ZakkkkAttackkkk
🇵🇭
Walter225
DialFrost
🇸🇬
KasperKivimaeki
🇫🇮
SirBogman
🇺🇸
AdamHe17
AliceFord
Natanaelel
🇸🇪
btjones0
marcin7Cd
tri1212
🇻🇳
vhoulbreque
🇫🇷
KatieLG
🇬🇧
tkr-sh
🇰🇵
jroscoe5
fredrik-bakke
🇳🇴
firegene
🇮🇪
OhmNomNom
0-4849
M0PKOBKA
calumacutt
thehylian
fynnkroeger
shellbertt
🇨🇦
hunt-g
ljweel
jmerle
🇳🇱
TaserTheFox
🇺🇸
pinguicula
TheoKeller1
fkantelberg
Mikey-Beep
🇬🇧
eiburns
htareque
wearsunscreen
Grrisly
m42km
GeneralPoxter
logvp
JoaoFelipe3
ehulinsky
🇺🇸
Lewenhaupt
Yewzir
🇧🇪
stertooy
🇧🇪
cuboids
jipsong
🇩🇪
mattyhempstead
wh3n3v3r
🇨🇿
klixel
🇨🇦
tjwrenn
nullie
maxgodfrey2004
🇨🇦
lolgeny
andrewjc2000
Bulmenisaurus
souta-1326
BenjaminHGong
FEZfan
🇦🇺
wuduculfre
BREMAUCY
🇫🇷
FortuiteMan
🇫🇷
miaoaixuan
Lv0Sys
🇵🇱
zacharysfrazee
bpharaldsson
error256
CLOStrophobic
🇮🇹
bschorno
ChrisTheisen
kellantech