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 223rd pardouin 🇫🇷 940 51 12 Apr 2025 227th primo-ppcg 🇹🇭 939 58 13 Nov 2022 227th clockworknazo 939 58 15 Nov 2022 227th Lydxn 🇨🇦 939 58 7 Feb 2023 227th xsot 🇸🇬 939 58 28 Jun 2024 227th Salutations45 939 58 18 Dec 2024 232nd TFeld00 🇩🇰 939 71 17 May 2022 232nd DialFrost 🇸🇬 939 71 15 Nov 2022 232nd StefanHabel 🇨🇦 939 71 29 Nov 2022 232nd nstearns96 🇬🇧 939 71 11 Jan 2023 232nd hallvabo 🇳🇴 939 71 7 Feb 2023 232nd anter69 🇭🇺 939 71 21 May 2024 232nd rucin93 🇵🇱 939 71 10 Jul 2024 232nd lelbal 939 71 26 Aug 2025 232nd HETHAT 🇩🇿 939 71 13 days ago 241st inventshah 938 57 4 May 2022 241st itsh01 938 57 17 May 2022 241st Natanaelel 🇸🇪 938 57 16 Jun 2022 241st Attero 🇸🇪 938 57 3 Aug 2022 241st SirFireball3521 938 57 26 Jan 2023 241st Kacarott 🇦🇺 938 57 24 Mar 2023 241st nathanadams 🇳🇿 938 57 24 Apr 2023 241st hacker112 🇸🇪 938 57 20 Jun 2024 241st thisishowmymindworks 🇳🇴 938 57 28 Jun 2024 241st Salutations45 938 57 18 Nov 2024 241st daniel-cardone 938 57 3 Jul 2025 241st CaedenHarper 🇨🇦 938 57 9 days ago 253rd Irratix 🇳🇱 938 83 4 May 2022 253rd nwellnhof 🇩🇪 938 83 4 May 2022 253rd ScottHamper 938 83 5 May 2022 253rd Romain-1 🇫🇷 938 83 1 Jun 2022 253rd Gaddy 🇫🇷 938 83 1 Jun 2022 253rd 5quiwyrm 938 83 4 Sep 2022 253rd Betuaredead 938 83 5 Jan 2023 253rd Yewzir 🇧🇪 938 83 12 Feb 2023 253rd btnlq 938 83 9 Mar 2023 253rd Adix-null 🇱🇹 938 83 17 May 2023 253rd AdrienHache 🇫🇷 938 83 8 Jun 2023 253rd gblikas 938 83 23 Jul 2023 253rd KrausRaus 🇺🇸 938 83 31 Jul 2023 253rd namelessiw 938 83 9 Apr 2025 253rd dokutan 938 83 9 Apr 2025 253rd m-tkach 🇺🇦 938 83 10 Apr 2025 253rd DialFrost 🇸🇬 938 83 10 Apr 2025 253rd Pecanolith 938 83 19 Apr 2025 253rd Tyrant7 938 83 19 Apr 2025 253rd Yax42 🇫🇷 938 83 19 Apr 2025 253rd MeWhenI 🇻🇦 938 83 19 Jun 2025 253rd sean-niemann 🇺🇸 938 83 20 Jun 2025 253rd stefangimmillaro 938 83 20 Jun 2025 253rd tomh1012 938 83 28 Aug 2025 253rd fuzzylojik-golf 🇺🇸 938 83 8 Sep 2025 278th grey0ut 937 48 8 Apr 2025 279th GolfingSuccess 🇬🇷 937 49 12 Aug 2024 279th Shanethegamer 🇺🇸 937 49 12 Aug 2024 279th Steffan153 🇫🇮 937 49 12 Aug 2024 279th MeWhenI 🇻🇦 937 49 13 Aug 2024 279th DialFrost 🇸🇬 937 49 13 Aug 2024 279th GrayJoKing 🇦🇺 937 49 15 Aug 2024 279th btnlq 937 49 16 Aug 2024 279th emgordon154 937 49 19 Aug 2024 279th ovs-code 🇩🇪 937 49 19 Aug 2024 279th mousetail 🇳🇱 937 49 13 Sep 2024 279th lynn 937 49 20 Dec 2024 279th weeble 937 49 20 Dec 2024 279th sean-niemann 🇺🇸 937 49 11 Jan 2025 292nd DialFrost 🇸🇬 936 89 13 days ago 292nd ovs-code 🇩🇪 936 89 13 days ago 292nd dokutan 936 89 13 days ago 292nd sean-niemann 🇺🇸 936 89 12 days ago 292nd Shanethegamer 🇺🇸 936 89 12 days ago 292nd nwellnhof 🇩🇪 936 89 12 days ago 292nd m-tkach 🇺🇦 936 89 12 days ago 292nd namelessiw 936 89 5 days ago 292nd Yewzir 🇧🇪 936 89 5 days ago First Prev 226–300 of 3,385 Next Last