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 Gray Code Decoder Gray Code Encoder 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 Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript 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 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 ArkScript 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 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 Gray Code Decoder Gray Code Encoder 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 Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 793rd larcherMTT 874 72 2ms 5 Oct 2024 793rd snyderek 🇺🇸 874 72 2ms 19 Feb 2025 793rd 5quiwyrm 874 72 2ms 29 Jun 2025 793rd TeodorDyakov 🇧🇬 874 72 3ms 8 Jul 2025 793rd xiaoyiming123 874 72 2ms 12 Jul 2025 806th Shanethegamer 🇺🇸 874 85 38ms 15 May 2023 806th albanian-laundromat 🇺🇸 874 85 40ms 25 Aug 2025 808th Andriamanitra 🇫🇮 873 54 42ms 21 Jul 2022 808th jared-hughes 873 54 39ms 12 Sep 2022 808th OhmNomNom 873 54 41ms 7 Oct 2022 808th olleicua 🇺🇸 873 54 44ms 21 Jan 2024 808th LostSyntax21 🇬🇧 873 54 41ms 12 Mar 2025 808th AbrahamJLR 🇻🇪 873 54 40ms 4 Jun 2025 808th vishal-mohanty 873 54 39ms 25 Aug 2025 808th madex 🇩🇪 873 54 44ms 9 days ago 816th DialFrost 🇸🇬 873 64 5ms 10 Jul 2024 817th dieggsy 873 97 31ms 8 Oct 2024 818th ovs-code 🇩🇪 873 133 42ms 8 Jul 2024 819th scpchicken 🇵🇼 872 45 406ms 4 May 2022 819th SirBogman 🇺🇸 872 45 274ms 5 May 2022 821st ulucs 871 35 9ms 8 May 2022 821st bstrat 871 35 9ms 6 Jun 2024 821st wh3n3v3r 🇨🇿 871 35 8ms 18 Nov 2024 824th TFeld00 🇩🇰 871 71 25ms 17 May 2022 824th DialFrost 🇸🇬 871 71 26ms 15 Nov 2022 824th StefanHabel 🇨🇦 871 71 20ms 29 Nov 2022 824th nstearns96 🇬🇧 871 71 25ms 11 Jan 2023 824th hallvabo 🇳🇴 871 71 20ms 7 Feb 2023 824th anter69 🇭🇺 871 71 18ms 21 May 2024 824th rucin93 🇵🇱 871 71 19ms 10 Jul 2024 824th lelbal 871 71 20ms 26 Aug 2025 824th HETHAT 🇩🇿 871 71 23ms 23 Sep 2025 824th 09cf 871 71 17ms 18 Nov 2025 824th CommandLeo 🇮🇹 871 71 26ms 8 Jan 2026 824th Flekay 🇩🇪 871 71 20ms 12 Feb 2026 824th snoozingnewt 🇨🇦 871 71 20ms 13 Feb 2026 824th JOrE20 871 71 16ms 25 Feb 2026 824th flekAI 871 71 17ms 2 days ago 824th scpchicken 🇵🇼 871 71 17ms 28 hours ago 840th Steffan153 🇫🇮 871 82 1,323ms 23 Feb 2023 841st Frowny 869 38 40ms 5 May 2022 841st stackofbears 869 38 42ms 14 Mar 2025 843rd steffan-polygolf 869 73 92ms 23 Feb 2023 843rd MWI-polygolf 869 73 92ms 6 Dec 2023 843rd HumanoidCPU 869 73 82ms 7 May 2024 846th MeWhenI 🇻🇦 869 92 467ms 10 Oct 2022 846th Betuaredead 869 92 480ms 5 Jan 2023 846th Yax42 🇫🇷 869 92 459ms 4 Oct 2025 849th 123mjb 869 96 366ms 20 Nov 2025 849th noescareno 869 96 366ms 21 Nov 2025 851st nwellnhof 🇩🇪 869 111 308ms 4 May 2022 851st emplv 🇱🇻 869 111 348ms 5 May 2022 851st Shanethegamer 🇺🇸 869 111 309ms 21 Nov 2023 854th pardouin 🇫🇷 868 61 162ms 7 Aug 2024 855th TylerBloom 867 96 123ms 22 Mar 2024 856th shellbertt 🇨🇦 867 98 63ms 9 May 2022 856th iakolzin 867 98 57ms 26 May 2022 856th Betuaredead 867 98 60ms 5 Jan 2023 856th oceko 867 98 74ms 19 Feb 2024 856th cuzdav 867 98 63ms 4 May 2025 856th timhaj 🇸🇮 867 98 65ms 12 Sep 2025 856th Yax42 🇫🇷 867 98 54ms 4 Oct 2025 856th liamjermy6 867 98 61ms 12 days ago 864th 5quiwyrm 866 52 304ms 4 Sep 2022 864th MeWhenI 🇻🇦 866 52 265ms 28 Jan 2023 864th Feniske 🇫🇷 866 52 295ms 7 Nov 2023 864th dcgjb 866 52 279ms 29 Jan 2024 864th JPRuskin 🇬🇧 866 52 263ms 7 Apr 2025 864th IISResetMe 866 52 278ms 7 Apr 2025 864th Ripick 866 52 295ms 1 Jun 2025 864th madex 🇩🇪 866 52 277ms 16 Mar 2026 872nd Andriamanitra 🇫🇮 866 67 144ms 26 Apr 2023 873rd typeswitch-dev 🇵🇹 866 75 4ms 22 Jul 2023 874th DialFrost 🇸🇬 866 84 17ms 1 Jan 2026 875th bac0id 866 90 354ms 26 Sep 2023 875th deadp4nda 🇩🇪 866 90 374ms 26 Apr 2024 875th 123mjb 866 90 367ms 23 Jun 2025 875th michelebastione 🇮🇹 866 90 378ms 24 Aug 2025 875th razvandmtr 🇷🇴 866 90 387ms 6 Nov 2025 880th dokutan 865 79 10ms 27 Apr 2024 First Prev 801–880 of 3,756 Next Last