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 560th dvargas46 🇺🇸 890 52 89ms 22 Dec 2022 562nd mousetail 🇳🇱 888 41 66ms 29 Aug 2025 563rd MeWhenI 🇻🇦 888 53 40ms 1 Jun 2022 563rd stefangimmillaro 888 53 37ms 2 Oct 2022 563rd Haksell 🇦🇶 888 53 45ms 22 Feb 2023 566th primo-ppcg 🇹🇭 888 85 39ms 14 Jan 2025 566th MeWhenI 🇻🇦 888 85 41ms 21 Apr 2025 568th ovs-code 🇩🇪 887 73 340ms 22 Jul 2023 569th janbehrens 🇩🇪 887 90 442ms 21 Apr 2023 569th Yewzir 🇧🇪 887 90 426ms 22 Apr 2023 569th Ripick 887 90 439ms 27 Nov 2024 569th emgordon154 887 90 368ms 10 Dec 2025 573rd albanian-laundromat 887 94 486ms 24 Sep 2025 573rd jkelly467 887 94 401ms 23 Oct 2025 573rd HumanoidCPU 887 94 479ms 8 Nov 2025 576th snoozingnewt 🇨🇦 887 96 107ms 4 Dec 2025 577th GolfingSuccess 🇬🇷 886 71 2ms 5 May 2022 577th emplv 🇱🇻 886 71 2ms 5 May 2022 577th JayXon 🇺🇸 886 71 2ms 7 May 2022 577th nwellnhof 🇩🇪 886 71 2ms 5 Jun 2022 577th stefangimmillaro 886 71 2ms 2 Jun 2023 577th 09cf 886 71 7ms 4 Oct 2023 577th kkoenig 886 71 2ms 21 Dec 2023 577th sean-niemann 🇺🇸 886 71 2ms 10 Jul 2024 577th masinag 🇮🇹 886 71 2ms 6 Oct 2024 586th m-tkach 🇺🇦 886 112 130ms 22 Jun 2025 587th steffan-polygolf 885 74 136ms 14 Feb 2024 587th prestosilver 🇺🇸 885 74 115ms 18 Dec 2025 589th SiestaGuru 885 88 411ms 9 Jan 2023 589th rifatx 885 88 390ms 5 Jul 2024 589th kmathis22 885 88 398ms 25 Sep 2025 592nd nipzu 885 94 118ms 17 May 2022 592nd Natanaelel 🇸🇪 885 94 118ms 17 Jun 2022 592nd nkoppel 885 94 128ms 19 Oct 2022 592nd ovs-code 🇩🇪 885 94 125ms 21 Jun 2023 592nd mousetail 🇳🇱 885 94 130ms 12 Jan 2024 597th m-tkach 🇺🇦 884 59 401ms 21 Jan 2024 597th GolfingSuccess 🇬🇷 884 59 502ms 20 Jan 2025 597th duckyluuk 🇳🇱 884 59 409ms 4 Dec 2025 600th kg583 🇺🇸 884 84 17ms 30 Jul 2025 600th DialFrost 🇸🇬 884 84 19ms 1 Jan 2026 602nd Irratix 🇳🇱 884 96 57ms 4 May 2022 602nd MeWhenI 🇻🇦 884 96 54ms 1 Jun 2022 602nd janbehrens 🇩🇪 884 96 57ms 21 Apr 2023 602nd Shanethegamer 🇺🇸 884 96 57ms 15 May 2023 602nd Yewzir 🇧🇪 884 96 56ms 11 Nov 2023 602nd MateuszPietrzak 🇵🇱 884 96 60ms 18 Nov 2023 602nd kkoenig 884 96 58ms 21 Dec 2023 602nd BlankSpruce 884 96 60ms 20 Aug 2024 602nd fuzzylojik-golf 🇺🇸 884 96 60ms 14 Jun 2025 611th sean-niemann 🇺🇸 884 109 258ms 25 May 2024 611th GolfingSuccess 🇬🇷 884 109 264ms 6 Sep 2025 613th MichalMarsalek 🇨🇿 883 70 20ms 5 May 2022 613th primo-ppcg 🇹🇭 883 70 25ms 5 May 2022 613th SirBogman 🇺🇸 883 70 19ms 5 May 2022 613th prplz 🇦🇺 883 70 29ms 5 May 2022 613th Irratix 🇳🇱 883 70 18ms 7 May 2022 613th rak1507 🇬🇧 883 70 20ms 7 May 2022 613th inventshah 883 70 18ms 9 May 2022 613th k3w1k0d3r 883 70 22ms 22 Jun 2022 613th ZakkkkAttackkkk 🇵🇭 883 70 18ms 14 Jul 2022 613th Bonjour27891 🇻🇳 883 70 20ms 14 Jul 2022 613th OllieBoyne 🇬🇧 883 70 20ms 19 Jul 2022 613th wen1now 883 70 20ms 8 Aug 2022 613th 051 🇸🇬 883 70 19ms 8 Aug 2022 613th Sp3000 🇦🇺 883 70 21ms 8 Aug 2022 613th betaveros 883 70 19ms 9 Aug 2022 613th shelerr 883 70 20ms 9 Sep 2022 613th stewSquared 🇺🇸 883 70 20ms 27 Sep 2022 613th orthoplex 🇨🇽 883 70 24ms 9 Oct 2022 613th 5quiwyrm 883 70 21ms 19 Oct 2022 613th myfatemi04 883 70 22ms 4 Nov 2022 613th kevinmchung 883 70 21ms 4 Nov 2022 613th FlorianCassayre 🇫🇷 883 70 18ms 7 Nov 2022 613th fourth-bit 883 70 19ms 29 Nov 2022 613th QuincyNash 🇺🇸 883 70 20ms 29 Nov 2022 613th aksyristos 883 70 20ms 25 Dec 2022 613th thizanne 883 70 20ms 27 Dec 2022 613th Alex-x90 🇺🇸 883 70 20ms 20 Jan 2023 613th bob-th 883 70 21ms 24 Jan 2023 First Prev 561–640 of 3,565 Next Last