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 Trinomial Triangle 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 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 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 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 Turtle Tutorial # Golfer Points Bytes Time Submitted 802nd tobyLovick 889 75 10 Nov 2023 802nd VictorStenvers 🇳🇱 889 75 30ms 13 Nov 2023 802nd RZ781 889 75 19 Nov 2023 802nd mikehanus 889 75 21 Nov 2023 802nd 1231234md5 🇨🇳 889 75 14 Dec 2023 802nd Hebelub 889 75 6 Jan 2024 802nd minhtrancccp 889 75 11 Jan 2024 802nd 123mjb 889 75 25 Jan 2024 802nd jbjd 889 75 25 Feb 2024 802nd gabe-gallegos 889 75 2 May 2024 802nd kejcao 🇨🇦 889 75 11 May 2024 802nd f-tucker 889 75 24 May 2024 802nd Florian-Mt 889 75 22 Jul 2024 802nd codingisgreatbutiamnot 889 75 9 Aug 2024 802nd Terobero 889 75 23 Aug 2024 802nd abhishekg999 889 75 17 Sep 2024 802nd RedzGoose 🇦🇺 889 75 7 Oct 2024 802nd Clay-Goodling 889 75 8 Oct 2024 802nd JunkIce 889 75 5 Mar 2025 802nd jiji7879 889 75 20 Jun 2025 802nd faragocsaba 889 75 22 Jun 2025 802nd bknower 889 75 30 Jun 2025 802nd clayboll99 889 75 14 Jul 2025 802nd fvla 889 75 6 days ago 850th mousetail 🇳🇱 888 41 29 Aug 2025 851st primo-ppcg 🇹🇭 888 85 14 Jan 2025 851st MeWhenI 🇻🇦 888 85 21 Apr 2025 853rd jared-hughes 888 130 15 Dec 2024 854th canissimia 🇦🇶 888 204 25 Nov 2023 855th MeWhenI 🇻🇦 887 53 1 Jun 2022 855th stefangimmillaro 887 53 2 Oct 2022 855th Haksell 🇦🇶 887 53 22 Feb 2023 858th Shanethegamer 🇺🇸 886 70 12 Dec 2022 858th Alessandro-Balconi 🇮🇹 886 70 26 Dec 2022 860th ovs-code 🇩🇪 886 73 22 Jul 2023 861st albanian-laundromat 886 94 27 days ago 861st kmathis22 886 94 6 days ago 863rd m-tkach 🇺🇦 886 112 22 Jun 2025 864th GolfingSuccess 🇬🇷 885 71 5 May 2022 864th emplv 🇱🇻 885 71 5 May 2022 864th JayXon 🇺🇸 885 71 7 May 2022 864th nwellnhof 🇩🇪 885 71 5 Jun 2022 864th stefangimmillaro 885 71 2 Jun 2023 864th 09cf 885 71 4 Oct 2023 864th kkoenig 885 71 21 Dec 2023 864th sean-niemann 🇺🇸 885 71 10 Jul 2024 864th masinag 🇮🇹 885 71 6 Oct 2024 873rd SiestaGuru 885 88 9 Jan 2023 873rd rifatx 885 88 5 Jul 2024 873rd kmathis22 885 88 25 days ago 876th janbehrens 🇩🇪 885 90 21 Apr 2023 876th Yewzir 🇧🇪 885 90 22 Apr 2023 876th DialFrost 🇸🇬 885 90 6 Nov 2023 876th Ripick 885 90 27 Nov 2024 880th m-tkach 🇺🇦 884 59 21 Jan 2024 880th GolfingSuccess 🇬🇷 884 59 20 Jan 2025 882nd nipzu 884 94 17 May 2022 882nd Natanaelel 🇸🇪 884 94 17 Jun 2022 882nd nkoppel 884 94 19 Oct 2022 882nd ovs-code 🇩🇪 884 94 21 Jun 2023 882nd mousetail 🇳🇱 884 94 12 Jan 2024 887th MeWhenI 🇻🇦 884 110 298ms 9 Feb 2023 887th edsrzf 🇳🇿 884 110 306ms 28 Nov 2024 887th targrik 884 110 279ms 30 Jun 2025 890th steffan-polygolf 883 74 14 Feb 2024 891st kg583 🇺🇸 883 84 30 Jul 2025 892nd Irratix 🇳🇱 883 96 4 May 2022 892nd MeWhenI 🇻🇦 883 96 1 Jun 2022 892nd janbehrens 🇩🇪 883 96 21 Apr 2023 892nd Shanethegamer 🇺🇸 883 96 15 May 2023 892nd Yewzir 🇧🇪 883 96 11 Nov 2023 892nd MateuszPietrzak 🇵🇱 883 96 18 Nov 2023 892nd kkoenig 883 96 21 Dec 2023 892nd BlankSpruce 883 96 20 Aug 2024 892nd fuzzylojik-golf 🇺🇸 883 96 14 Jun 2025 First Prev 826–900 of 3,406 Next Last