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 Continued Fractions 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four 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 ><> ALGOL 68 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 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 ><> ALGOL 68 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 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 Continued Fractions 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four 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 557th Steffan153 🇫🇮 892 65 181ms 12 Nov 2022 557th tobeannouncd 892 65 302ms 25 Apr 2025 557th sean-niemann 🇺🇸 892 65 168ms 9 Jun 2025 564th stefangimmillaro 892 71 89ms 2 Oct 2022 564th Steffan153 🇫🇮 892 71 97ms 23 Feb 2023 564th Shanethegamer 🇺🇸 892 71 93ms 16 May 2023 564th sean-niemann 🇺🇸 892 71 92ms 12 Jul 2024 568th Lydxn 🇨🇦 892 108 284ms 6 May 2022 568th CaedenHarper 🇨🇦 892 108 304ms 5 Oct 2025 570th GrayJoKing 🇦🇺 891 77 76ms 13 Sep 2024 571st DialFrost 🇸🇬 891 95 29ms 10 Dec 2024 572nd canissimia 🇦🇶 891 110 2,640ms 20 Feb 2023 573rd jared-hughes 891 130 22ms 15 Dec 2024 574th canissimia 🇦🇶 891 204 16ms 25 Nov 2023 575th primo-ppcg 🇹🇭 890 52 219ms 5 May 2022 575th dvargas46 🇺🇸 890 52 87ms 22 Dec 2022 577th frankgraziano 890 75 16ms 11 days ago 578th snoozingnewt 🇨🇦 890 96 133ms 4 Dec 2025 578th Steffan153 🇫🇮 890 96 117ms 8 days ago 580th mousetail 🇳🇱 888 41 66ms 29 Aug 2025 581st MeWhenI 🇻🇦 888 53 40ms 1 Jun 2022 581st stefangimmillaro 888 53 37ms 2 Oct 2022 581st Haksell 🇦🇶 888 53 42ms 22 Feb 2023 584th primo-ppcg 🇹🇭 888 85 39ms 14 Jan 2025 584th MeWhenI 🇻🇦 888 85 41ms 21 Apr 2025 586th m-tkach 🇺🇦 888 112 120ms 22 Jun 2025 587th ovs-code 🇩🇪 887 73 340ms 22 Jul 2023 588th frosster 🇨🇦 887 77 5ms 26 days ago 589th janbehrens 🇩🇪 887 90 467ms 21 Apr 2023 589th Yewzir 🇧🇪 887 90 459ms 22 Apr 2023 589th Ripick 887 90 459ms 27 Nov 2024 589th emgordon154 887 90 476ms 10 Dec 2025 593rd albanian-laundromat 887 94 486ms 24 Sep 2025 593rd jkelly467 887 94 401ms 23 Oct 2025 593rd HumanoidCPU 887 94 479ms 8 Nov 2025 596th GolfingSuccess 🇬🇷 886 71 2ms 5 May 2022 596th emplv 🇱🇻 886 71 2ms 5 May 2022 596th JayXon 🇺🇸 886 71 2ms 7 May 2022 596th nwellnhof 🇩🇪 886 71 2ms 5 Jun 2022 596th stefangimmillaro 886 71 2ms 2 Jun 2023 596th 09cf 886 71 7ms 4 Oct 2023 596th kkoenig 886 71 2ms 21 Dec 2023 596th sean-niemann 🇺🇸 886 71 2ms 10 Jul 2024 596th masinag 🇮🇹 886 71 2ms 6 Oct 2024 605th SiestaGuru 886 88 411ms 9 Jan 2023 605th rifatx 886 88 390ms 5 Jul 2024 605th kmathis22 886 88 398ms 25 Sep 2025 608th steffan-polygolf 885 74 132ms 14 Feb 2024 608th prestosilver 🇺🇸 885 74 134ms 18 Dec 2025 610th nipzu 885 94 136ms 17 May 2022 610th Natanaelel 🇸🇪 885 94 129ms 17 Jun 2022 610th nkoppel 885 94 135ms 19 Oct 2022 610th ovs-code 🇩🇪 885 94 147ms 21 Jun 2023 610th mousetail 🇳🇱 885 94 142ms 12 Jan 2024 615th Irratix 🇳🇱 885 96 56ms 4 May 2022 615th MeWhenI 🇻🇦 885 96 55ms 1 Jun 2022 615th janbehrens 🇩🇪 885 96 59ms 21 Apr 2023 615th Shanethegamer 🇺🇸 885 96 57ms 15 May 2023 615th Yewzir 🇧🇪 885 96 59ms 11 Nov 2023 615th MateuszPietrzak 🇵🇱 885 96 55ms 18 Nov 2023 615th kkoenig 885 96 56ms 21 Dec 2023 615th BlankSpruce 885 96 58ms 20 Aug 2024 615th fuzzylojik-golf 🇺🇸 885 96 58ms 14 Jun 2025 615th dokutan 885 96 58ms 26 days ago 625th m-tkach 🇺🇦 884 59 401ms 21 Jan 2024 625th GolfingSuccess 🇬🇷 884 59 502ms 20 Jan 2025 625th duckyluuk 🇳🇱 884 59 409ms 4 Dec 2025 628th DialFrost 🇸🇬 884 84 18ms 1 Jan 2026 629th sean-niemann 🇺🇸 884 109 278ms 25 May 2024 629th GolfingSuccess 🇬🇷 884 109 289ms 6 Sep 2025 631st MichalMarsalek 🇨🇿 883 70 20ms 5 May 2022 631st primo-ppcg 🇹🇭 883 70 25ms 5 May 2022 631st SirBogman 🇺🇸 883 70 19ms 5 May 2022 631st prplz 🇦🇺 883 70 21ms 5 May 2022 631st Irratix 🇳🇱 883 70 17ms 7 May 2022 631st rak1507 🇬🇧 883 70 20ms 7 May 2022 631st inventshah 883 70 18ms 9 May 2022 631st k3w1k0d3r 883 70 20ms 22 Jun 2022 631st ZakkkkAttackkkk 🇵🇭 883 70 18ms 14 Jul 2022 631st Bonjour27891 🇻🇳 883 70 20ms 14 Jul 2022 First Prev 561–640 of 3,615 Next Last