Collatz in all languages in bytes. Cheevos Holes Recent Holes Langs Medals Misc 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 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 Morse Decoder Morse Encoder 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 Transpose Sentence United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Calendar Connect Four CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Trinomial Triangle Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir 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 Arturo Befunge BQN CJam CoffeeScript Egel Erlang Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 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 Arturo Befunge BQN CJam CoffeeScript Egel Erlang Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 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 Morse Decoder Morse Encoder 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 Transpose Sentence United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Apéry’s Constant Calendar Connect Four CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Trinomial Triangle Turtle Tutorial # Golfer Points Bytes Time 788th Terobero 889 75 23 Aug 2024 788th abhishekg999 889 75 17 Sep 2024 788th RedzGoose 🇦🇺 889 75 7 Oct 2024 788th Clay-Goodling 889 75 8 Oct 2024 788th JunkIce 889 75 5 Mar 2025 788th jiji7879 889 75 20 Jun 2025 788th faragocsaba 889 75 22 Jun 2025 788th bknower 889 75 30 Jun 2025 788th clayboll99 889 75 14 Jul 2025 835th GrayJoKing 🇦🇺 889 77 13 Sep 2024 836th mousetail 🇳🇱 888 41 27 days ago 837th primo-ppcg 🇹🇭 888 85 14 Jan 2025 837th MeWhenI 🇻🇦 888 85 21 Apr 2025 839th canissimia 🇦🇶 888 204 25 Nov 2023 840th MeWhenI 🇻🇦 887 53 1 Jun 2022 840th stefangimmillaro 887 53 2 Oct 2022 840th Haksell 🇦🇶 887 53 22 Feb 2023 843rd DialFrost 🇸🇬 887 56 24 days ago 844th Shanethegamer 🇺🇸 886 70 12 Dec 2022 844th Alessandro-Balconi 🇮🇹 886 70 26 Dec 2022 846th ovs-code 🇩🇪 886 73 22 Jul 2023 847th m-tkach 🇺🇦 886 112 22 Jun 2025 848th jared-hughes 886 130 15 Dec 2024 849th GolfingSuccess 🇬🇷 885 71 5 May 2022 849th emplv 🇱🇻 885 71 5 May 2022 849th JayXon 🇺🇸 885 71 7 May 2022 849th nwellnhof 🇩🇪 885 71 5 Jun 2022 849th stefangimmillaro 885 71 2 Jun 2023 849th 09cf 885 71 4 Oct 2023 849th kkoenig 885 71 21 Dec 2023 849th sean-niemann 🇺🇸 885 71 10 Jul 2024 849th masinag 🇮🇹 885 71 6 Oct 2024 858th albanian-laundromat 885 94 18 hours ago 859th SiestaGuru 884 88 9 Jan 2023 859th rifatx 884 88 5 Jul 2024 861st janbehrens 🇩🇪 884 90 21 Apr 2023 861st Yewzir 🇧🇪 884 90 22 Apr 2023 861st DialFrost 🇸🇬 884 90 6 Nov 2023 861st Ripick 884 90 27 Nov 2024 865th nipzu 884 94 17 May 2022 865th Natanaelel 🇸🇪 884 94 17 Jun 2022 865th nkoppel 884 94 19 Oct 2022 865th ovs-code 🇩🇪 884 94 21 Jun 2023 865th mousetail 🇳🇱 884 94 12 Jan 2024 870th m-tkach 🇺🇦 883 59 21 Jan 2024 870th GolfingSuccess 🇬🇷 883 59 20 Jan 2025 872nd steffan-polygolf 883 74 14 Feb 2024 873rd Irratix 🇳🇱 883 96 4 May 2022 873rd MeWhenI 🇻🇦 883 96 1 Jun 2022 873rd janbehrens 🇩🇪 883 96 21 Apr 2023 873rd Shanethegamer 🇺🇸 883 96 15 May 2023 873rd Yewzir 🇧🇪 883 96 11 Nov 2023 873rd MateuszPietrzak 🇵🇱 883 96 18 Nov 2023 873rd kkoenig 883 96 21 Dec 2023 873rd BlankSpruce 883 96 20 Aug 2024 873rd fuzzylojik-golf 🇺🇸 883 96 14 Jun 2025 882nd Shanethegamer 🇺🇸 882 51 15 May 2023 883rd kg583 🇺🇸 882 84 30 Jul 2025 884th GrayJoKing 🇦🇺 881 60 24 Oct 2024 885th johnnythedoggie 880 72 13 May 2022 885th kaascevich 880 72 8 Jul 2025 887th GrayJoKing 🇦🇺 880 84 19 Jun 2022 887th primo-ppcg 🇹🇭 880 84 29 Jun 2022 889th Shanethegamer 🇺🇸 879 73 8 May 2025 889th DialFrost 🇸🇬 879 73 3 Jun 2025 889th edsrzf 🇳🇿 879 73 4 Jul 2025 892nd Grrisly 879 74 25 Mar 2024 893rd Shanethegamer 🇺🇸 879 142 27 Mar 2025 893rd DialFrost 🇸🇬 879 142 28 Mar 2025 893rd emgordon154 879 142 10 Apr 2025 896th primo-ppcg 🇹🇭 879 193 14 Aug 2025 897th dokutan 878 62 28 Apr 2025 898th DialFrost 🇸🇬 878 86 24 Oct 2024 898th stefangimmillaro 878 86 14 Jan 2025 900th c0d3-4-F00d 🇩🇪 877 61 6 May 2022 Prev 826–900 of 3,341 Next