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 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 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 Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Hilbert Curve Mandelbrot Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion QR Encoder Quadratic Formula Scrambled Alphabetization 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 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 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 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 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 Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Hilbert Curve Mandelbrot Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion QR Encoder Quadratic Formula Scrambled Alphabetization Semiprime Numbers Snake Sphenic Numbers Trinomial Triangle Turtle Tutorial # Golfer Points Chars Time 444th BloodStormKnight 886 60 15 Oct 2022 444th dzshn 886 60 3 Dec 2022 444th biocommando 🇫🇮 886 60 20 Dec 2022 444th Betuaredead 886 60 5 Jan 2023 444th piano-miles 886 60 16 Jan 2023 444th Yewzir 🇧🇪 886 60 12 Feb 2023 444th shellbertt 🇨🇦 886 60 26 Feb 2023 444th zakariamouhid 886 60 20 May 2023 444th raphaelimahorn 886 60 23 Aug 2023 444th jbt 886 60 25 Dec 2023 444th olleicua 🇺🇸 886 60 15 Feb 2024 444th HumanoidCPU 886 60 3 May 2024 444th dokutan 886 60 13 Aug 2024 444th LostSyntax21 🇬🇧 886 60 10 Sep 2024 444th xyangst 886 60 28 Sep 2024 466th P-Quentin 🇫🇷 886 63 3 Aug 2022 466th kaptsanovb 886 63 20 Apr 2023 466th fkantelberg 886 63 14 Jul 2023 466th snoozingnewt 🇺🇸 886 63 10 Sep 2023 466th keelimeguy 🇺🇸 886 63 6 Nov 2023 466th VictorStenvers 🇳🇱 886 63 13 Nov 2023 466th 1231234md5 🇨🇳 886 63 14 Dec 2023 466th f-tucker 886 63 6 Feb 2024 466th JunkIce 886 63 24 Nov 2024 466th Kowalskiexe 🇵🇱 886 63 11 days ago 476th canissimia 🇦🇶 886 204 25 Nov 2023 477th lynn 885 65 5 May 2022 477th GrayJoKing 🇦🇺 885 65 5 May 2022 477th Sakisan 🇧🇪 885 65 6 May 2022 477th JayXon 🇺🇸 885 65 17 Oct 2022 477th Steffan153 🇫🇮 885 65 12 Nov 2022 477th tobeannouncd 885 65 5 days ago 483rd Lydxn 🇨🇦 885 72 16 Jul 2023 484th sean-niemann 🇺🇸 885 73 12 Jul 2024 485th Steffan153 🇫🇮 885 80 15 Nov 2022 485th error256 885 80 22 days ago 487th c0d3-4-F00d 🇩🇪 885 132 6 May 2022 487th madeforlosers 885 132 26 Oct 2023 487th Blockyheadman 885 132 1 Nov 2023 487th SpiritAxolotl 🇺🇸 885 132 20 Mar 2024 491st Shanethegamer 🇺🇸 884 61 31 Oct 2022 491st MeWhenI 🇻🇦 884 61 4 Nov 2022 493rd dokutan 884 82 1 Jul 2024 494th DialFrost 🇸🇬 884 95 10 Dec 2024 495th canissimia 🇦🇶 884 110 20 Feb 2023 496th nwellnhof 🇩🇪 884 111 4 May 2022 496th stefangimmillaro 884 111 26 Sep 2023 496th kkoenig 884 111 4 Jan 2024 499th zacjl 883 34 11 Dec 2024 500th Yewzir 🇧🇪 883 150 21 May 2024 501st Steffan153 🇫🇮 882 52 31 Dec 2022 502nd stefangimmillaro 882 71 2 Oct 2022 502nd Steffan153 🇫🇮 882 71 23 Feb 2023 502nd Shanethegamer 🇺🇸 882 71 16 May 2023 502nd sean-niemann 🇺🇸 882 71 12 Jul 2024 506th GrayJoKing 🇦🇺 882 77 13 Sep 2024 507th primo-ppcg 🇹🇭 880 52 5 May 2022 507th dvargas46 🇺🇸 880 52 22 Dec 2022 509th stefangimmillaro 880 53 2 Oct 2022 509th Haksell 🇦🇶 880 53 22 Feb 2023 511th GrayJoKing 🇦🇺 880 70 6 May 2022 511th ovs-code 🇩🇪 880 70 8 Oct 2023 511th catfish000 880 70 8 Oct 2023 511th saito-ta 🇯🇵 880 70 21 Dec 2023 511th sean-niemann 🇺🇸 880 70 10 Jul 2024 516th m-tkach 🇺🇦 880 117 7 May 2022 516th Lydxn 🇨🇦 880 117 7 May 2022 518th DialFrost 🇸🇬 879 76 17 Mar 2025 519th nipzu 879 94 17 May 2022 519th Natanaelel 🇸🇪 879 94 17 Jun 2022 519th nkoppel 879 94 19 Oct 2022 519th ovs-code 🇩🇪 879 94 21 Jun 2023 519th mousetail 🇳🇱 879 94 12 Jan 2024 519th sean-niemann 🇺🇸 879 94 13 Oct 2024 525th sisyphus-ppcg 🇦🇺 878 40 31 Jan 2023 Prev 451–525 of 2,982 Next