Collatz in all languages in chars. 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 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 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 Hilbert Curve Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime 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 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 Groovy Harbour Hare Haxe Hush Hy iogii Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua 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 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 Groovy Harbour Hare Haxe Hush Hy iogii Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua 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 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 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 Hilbert Curve Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Snake Sphenic Numbers Trinomial Triangle Turtle Tutorial # Golfer Points Chars Time 823rd RuyiLi 845 63 1 Apr 2023 823rd TaserTheFox 🇺🇸 845 63 25 May 2023 823rd pfysches-boop 845 63 6 Aug 2023 823rd mhgockel 845 63 19 Aug 2023 823rd NickTheEASDude 🇺🇸 845 63 18 Jan 2024 823rd 823126 845 63 14 Nov 2024 823rd Palladium02 845 63 12 May 2025 823rd 4very 845 63 27 days ago 823rd gigaprofisi 🇺🇸 845 63 21 days ago 823rd CaedenHarper 🇨🇦 845 63 9 days ago 836th NewDefectus 🇮🇱 844 73 6 May 2022 836th inventshah 844 73 12 Jun 2022 836th Natanaelel 🇸🇪 844 73 15 Jun 2022 836th Herbert00709 🇵🇱 844 73 22 Dec 2023 836th LorenzoDeGaspari 844 73 27 May 2024 841st jared-hughes 844 100 20 Jul 2022 841st ZakkkkAttackkkk 🇵🇭 844 100 10 Aug 2022 841st Walter225 844 100 25 Jul 2023 844th Natanaelel 🇸🇪 843 57 17 Jan 2024 844th Kacarott 🇦🇺 843 57 10 Sep 2024 846th retrohun 843 64 6 Nov 2022 846th Re-Adventures 🇮🇳 843 64 7 Nov 2022 846th stellartux 843 64 26 Dec 2023 846th bac0id 843 64 29 Jun 2024 846th snoozingnewt 🇺🇸 843 64 1 Sep 2024 851st DialFrost 🇸🇬 843 86 15 Dec 2024 852nd Shanethegamer 🇺🇸 843 98 26 Oct 2022 852nd emgordon154 843 98 18 Feb 2025 854th janAkali 🇷🇺 842 77 12 Feb 2025 855th bschorno 842 92 12 Oct 2022 855th ChrisTheisen 842 92 14 Dec 2022 855th kellantech 842 92 4 Jul 2023 855th Mezzofloat 842 92 26 Aug 2023 855th Maximizer02 842 92 1 Oct 2023 855th michelebastione 🇮🇹 842 92 22 Dec 2023 855th madeforlosers 842 92 21 Nov 2024 862nd krcs 🇵🇱 841 53 9 May 2022 862nd ryanlanegit 841 53 19 Jun 2022 862nd sisyphus-ppcg 🇦🇺 841 53 15 Aug 2022 865th DialFrost 🇸🇬 841 66 7 Apr 2025 866th Shanethegamer 🇺🇸 841 82 15 May 2023 867th lynn 841 96 11 Jul 2023 868th Smetalo 841 139 25 Aug 2022 868th ToxicP1e 841 139 2 Mar 2023 870th raszpi 🇭🇺 838 77 1 Sep 2023 871st error256 838 81 13 Sep 2024 872nd Codsilla 🇨🇦 837 51 1 Jul 2022 873rd frankgraziano 837 66 20 Apr 2025 874th sean-niemann 🇺🇸 837 76 8 Oct 2024 875th SirBogman 🇺🇸 836 89 4 May 2022 876th CatsAreFluffy 836 101 18 Feb 2023 876th annaproxy 836 101 9 May 2023 876th wojtekmal 836 101 15 Nov 2023 876th HumanoidCPU 836 101 6 May 2024 876th eMGeeneer 836 101 27 Jun 2024 876th bac0id 836 101 29 Jun 2024 882nd eshilo-draper 835 75 6 Sep 2022 883rd Andriamanitra 🇫🇮 835 83 17 Apr 2023 883rd Natanaelel 🇸🇪 835 83 8 Jul 2023 885th SirBogman 🇺🇸 834 36 5 May 2022 885th HPWiz 🇳🇿 834 36 7 May 2022 885th Natanaelel 🇸🇪 834 36 15 Jun 2022 885th Steffan153 🇫🇮 834 36 18 Jan 2023 885th codereport 🇨🇦 834 36 1 Jun 2024 885th GolfinK 834 36 21 Nov 2024 885th lifthrasiir 🇰🇷 834 36 1 Dec 2024 885th GolfingSuccess 🇬🇷 834 36 20 Mar 2025 893rd scpchicken 🇵🇼 834 55 4 May 2022 893rd SirBogman 🇺🇸 834 55 5 May 2022 893rd Shanethegamer 🇺🇸 834 55 19 May 2023 893rd DialFrost 🇸🇬 834 55 14 Feb 2025 897th moustave 834 67 7 Nov 2024 898th inverseLorentz 🇦🇺 834 69 3 Jun 2024 898th CLOStrophobic 🇮🇹 834 69 28 May 2025 900th ChiefChippy2 833 56 4 May 2022 Prev 826–900 of 3,155 Next