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 Colors (Inverse) 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 Colors (Inverse) 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 443rd dzshn 887 60 3 Dec 2022 443rd biocommando 🇫🇮 887 60 20 Dec 2022 443rd Betuaredead 887 60 5 Jan 2023 443rd piano-miles 887 60 16 Jan 2023 443rd Yewzir 🇧🇪 887 60 12 Feb 2023 443rd shellbertt 🇨🇦 887 60 26 Feb 2023 443rd zakariamouhid 887 60 20 May 2023 443rd raphaelimahorn 887 60 23 Aug 2023 443rd jbt 887 60 25 Dec 2023 443rd olleicua 🇺🇸 887 60 15 Feb 2024 443rd HumanoidCPU 887 60 3 May 2024 443rd dokutan 887 60 13 Aug 2024 443rd LostSyntax21 🇬🇧 887 60 10 Sep 2024 443rd xyangst 887 60 28 Sep 2024 443rd a6166231 🇨🇳 887 60 4 days ago 466th Ripick 887 73 8 May 2023 467th GrayJoKing 🇦🇺 887 91 19 Jan 2023 468th P-Quentin 🇫🇷 886 63 3 Aug 2022 468th kaptsanovb 886 63 20 Apr 2023 468th fkantelberg 886 63 14 Jul 2023 468th snoozingnewt 🇺🇸 886 63 10 Sep 2023 468th VictorStenvers 🇳🇱 886 63 13 Nov 2023 468th 1231234md5 🇨🇳 886 63 14 Dec 2023 468th f-tucker 886 63 6 Feb 2024 468th JunkIce 886 63 24 Nov 2024 468th Kowalskiexe 🇵🇱 886 63 19 Apr 2025 477th canissimia 🇦🇶 886 204 25 Nov 2023 478th lynn 885 65 5 May 2022 478th GrayJoKing 🇦🇺 885 65 5 May 2022 478th Sakisan 🇧🇪 885 65 6 May 2022 478th JayXon 🇺🇸 885 65 17 Oct 2022 478th Steffan153 🇫🇮 885 65 12 Nov 2022 478th tobeannouncd 885 65 24 days ago 484th Lydxn 🇨🇦 885 72 16 Jul 2023 485th sean-niemann 🇺🇸 885 73 12 Jul 2024 486th Steffan153 🇫🇮 885 80 15 Nov 2022 486th error256 885 80 8 Apr 2025 488th nwellnhof 🇩🇪 885 111 4 May 2022 488th stefangimmillaro 885 111 26 Sep 2023 488th kkoenig 885 111 4 Jan 2024 491st c0d3-4-F00d 🇩🇪 885 132 6 May 2022 491st madeforlosers 885 132 26 Oct 2023 491st Blockyheadman 885 132 1 Nov 2023 491st SpiritAxolotl 🇺🇸 885 132 20 Mar 2024 495th Shanethegamer 🇺🇸 884 61 31 Oct 2022 495th MeWhenI 🇻🇦 884 61 4 Nov 2022 497th dokutan 884 82 1 Jul 2024 498th DialFrost 🇸🇬 884 95 10 Dec 2024 499th canissimia 🇦🇶 884 110 20 Feb 2023 500th zacjl 883 34 11 Dec 2024 501st Yewzir 🇧🇪 883 150 21 May 2024 502nd Steffan153 🇫🇮 882 52 31 Dec 2022 503rd stefangimmillaro 882 71 2 Oct 2022 503rd Steffan153 🇫🇮 882 71 23 Feb 2023 503rd Shanethegamer 🇺🇸 882 71 16 May 2023 503rd sean-niemann 🇺🇸 882 71 12 Jul 2024 507th GrayJoKing 🇦🇺 882 77 13 Sep 2024 508th primo-ppcg 🇹🇭 880 52 5 May 2022 508th dvargas46 🇺🇸 880 52 22 Dec 2022 510th stefangimmillaro 880 53 2 Oct 2022 510th Haksell 🇦🇶 880 53 22 Feb 2023 512th GrayJoKing 🇦🇺 880 70 6 May 2022 512th ovs-code 🇩🇪 880 70 8 Oct 2023 512th catfish000 880 70 8 Oct 2023 512th saito-ta 🇯🇵 880 70 21 Dec 2023 512th sean-niemann 🇺🇸 880 70 10 Jul 2024 517th Shanethegamer 🇺🇸 880 72 11 days ago 518th m-tkach 🇺🇦 880 117 7 May 2022 518th Lydxn 🇨🇦 880 117 7 May 2022 520th DialFrost 🇸🇬 879 76 17 Mar 2025 521st nipzu 879 94 17 May 2022 521st Natanaelel 🇸🇪 879 94 17 Jun 2022 521st nkoppel 879 94 19 Oct 2022 521st ovs-code 🇩🇪 879 94 21 Jun 2023 521st mousetail 🇳🇱 879 94 12 Jan 2024 Prev 451–525 of 3,025 Next