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 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 Mandelbrot 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 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 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 Mandelbrot 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 600th MrGagnonHPS 872 134 1 Nov 2023 600th noescareno 872 134 14 days ago 603rd Shanethegamer 🇺🇸 872 142 27 Mar 2025 603rd DialFrost 🇸🇬 872 142 28 Mar 2025 603rd emgordon154 872 142 10 Apr 2025 606th Shanethegamer 🇺🇸 872 152 9 Sep 2023 606th emgordon154 872 152 2 Oct 2024 606th DialFrost 🇸🇬 872 152 27 Oct 2024 609th HPWiz 🇳🇿 871 49 4 May 2022 609th JayXon 🇺🇸 871 49 5 May 2022 609th Steffan153 🇫🇮 871 49 10 Dec 2022 609th ovs-code 🇩🇪 871 49 24 Oct 2023 609th sean-niemann 🇺🇸 871 49 12 Jul 2024 614th Shanethegamer 🇺🇸 871 66 4 May 2022 614th scpchicken 🇵🇼 871 66 5 May 2022 614th sisyphus-ppcg 🇦🇺 871 66 6 May 2022 614th Natanaelel 🇸🇪 871 66 15 Jun 2022 614th Z-snails 871 66 27 Feb 2023 614th Jeremy-Stafford 871 66 27 Feb 2023 614th alomiF 871 66 1 Sep 2023 614th btnlq 871 66 17 Oct 2023 622nd dokutan 870 62 28 Apr 2025 623rd johnnythedoggie 870 72 13 May 2022 624th DialFrost 🇸🇬 870 73 10 days ago 625th inventshah 870 97 6 May 2022 625th roupiq 🇵🇱 870 97 22 Nov 2023 627th MeWhenI 🇻🇦 870 207 21 Apr 2025 628th janbehrens 🇩🇪 869 90 21 Apr 2023 628th Yewzir 🇧🇪 869 90 22 Apr 2023 628th DialFrost 🇸🇬 869 90 6 Nov 2023 628th Ripick 869 90 27 Nov 2024 632nd GolfingSuccess 🇬🇷 868 71 5 May 2022 632nd emplv 🇱🇻 868 71 5 May 2022 632nd JayXon 🇺🇸 868 71 7 May 2022 632nd m-tkach 🇺🇦 868 71 15 May 2022 632nd nwellnhof 🇩🇪 868 71 5 Jun 2022 632nd Irratix 🇳🇱 868 71 13 Jun 2022 632nd michael-pruglo 🇺🇦 868 71 13 Jul 2022 632nd stefangimmillaro 868 71 2 Jun 2023 632nd kkoenig 868 71 21 Dec 2023 632nd JohandeRuiter 🇳🇱 868 71 14 Sep 2024 632nd masinag 🇮🇹 868 71 6 Oct 2024 632nd KasperKivimaeki 🇫🇮 868 71 27 Mar 2025 644th AlephSquirrel 867 80 20 Apr 2023 644th ashtraypettingzoo 🇺🇸 867 80 1 Apr 2024 646th nwellnhof 🇩🇪 866 53 4 May 2022 646th GrayJoKing 🇦🇺 866 53 6 May 2022 648th DialFrost 🇸🇬 866 86 24 Oct 2024 648th stefangimmillaro 866 86 14 Jan 2025 650th dieggsy 866 97 8 Oct 2024 650th edsrzf 🇳🇿 866 97 8 Dec 2024 652nd lukehewittvandy 866 135 18 Jul 2022 652nd OriEy 866 135 27 Apr 2023 652nd Maximizer02 866 135 8 Jun 2024 652nd 0dyse 866 135 23 Apr 2025 656th jacobly0 🇺🇸 866 153 26 Sep 2023 657th Andriamanitra 🇫🇮 864 54 21 Jul 2022 657th jared-hughes 864 54 12 Sep 2022 657th OhmNomNom 864 54 7 Oct 2022 657th olleicua 🇺🇸 864 54 21 Jan 2024 657th LostSyntax21 🇬🇧 864 54 12 Mar 2025 657th AbrahamJLR 864 54 10 days ago 663rd deadp4nda 🇩🇪 863 90 26 Apr 2024 664th DialFrost 🇸🇬 862 64 10 Jul 2024 665th Shanethegamer 🇺🇸 862 70 12 Dec 2022 665th Alessandro-Balconi 🇮🇹 862 70 26 Dec 2022 667th Grrisly 862 114 25 Mar 2024 668th mtirado1 861 75 13 Aug 2022 669th Steffan153 🇫🇮 861 82 23 Feb 2023 670th MeWhenI 🇻🇦 861 85 27 Jun 2022 670th Shanethegamer 🇺🇸 861 85 15 May 2023 672nd TylerBloom 861 96 22 Mar 2024 673rd shellbertt 🇨🇦 861 98 9 May 2022 673rd iakolzin 861 98 26 May 2022 673rd Betuaredead 861 98 5 Jan 2023 Prev 601–675 of 3,070 Next