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 599th emgordon154 872 142 10 Apr 2025 602nd Shanethegamer 🇺🇸 872 152 9 Sep 2023 602nd emgordon154 872 152 2 Oct 2024 602nd DialFrost 🇸🇬 872 152 27 Oct 2024 605th HPWiz 🇳🇿 871 49 4 May 2022 605th JayXon 🇺🇸 871 49 5 May 2022 605th Steffan153 🇫🇮 871 49 10 Dec 2022 605th ovs-code 🇩🇪 871 49 24 Oct 2023 605th sean-niemann 🇺🇸 871 49 12 Jul 2024 610th Shanethegamer 🇺🇸 871 66 4 May 2022 610th scpchicken 🇵🇼 871 66 5 May 2022 610th sisyphus-ppcg 🇦🇺 871 66 6 May 2022 610th Natanaelel 🇸🇪 871 66 15 Jun 2022 610th Z-snails 871 66 27 Feb 2023 610th Jeremy-Stafford 871 66 27 Feb 2023 610th alomiF 871 66 1 Sep 2023 610th btnlq 871 66 17 Oct 2023 610th sean-niemann 🇺🇸 871 66 9 Jan 2025 619th dokutan 870 62 28 Apr 2025 620th johnnythedoggie 870 72 13 May 2022 621st DialFrost 🇸🇬 870 73 44 hours ago 622nd inventshah 870 97 6 May 2022 622nd roupiq 🇵🇱 870 97 22 Nov 2023 622nd fuzzylojik-golf 🇺🇸 870 97 7 days ago 625th MeWhenI 🇻🇦 870 207 21 Apr 2025 626th janbehrens 🇩🇪 869 90 21 Apr 2023 626th Yewzir 🇧🇪 869 90 22 Apr 2023 626th DialFrost 🇸🇬 869 90 6 Nov 2023 626th Ripick 869 90 27 Nov 2024 630th GolfingSuccess 🇬🇷 868 71 5 May 2022 630th emplv 🇱🇻 868 71 5 May 2022 630th JayXon 🇺🇸 868 71 7 May 2022 630th m-tkach 🇺🇦 868 71 15 May 2022 630th nwellnhof 🇩🇪 868 71 5 Jun 2022 630th Irratix 🇳🇱 868 71 13 Jun 2022 630th michael-pruglo 🇺🇦 868 71 13 Jul 2022 630th stefangimmillaro 868 71 2 Jun 2023 630th kkoenig 868 71 21 Dec 2023 630th JohandeRuiter 🇳🇱 868 71 14 Sep 2024 630th masinag 🇮🇹 868 71 6 Oct 2024 630th KasperKivimaeki 🇫🇮 868 71 27 Mar 2025 642nd AlephSquirrel 867 80 20 Apr 2023 642nd ashtraypettingzoo 🇺🇸 867 80 1 Apr 2024 644th nwellnhof 🇩🇪 866 53 4 May 2022 644th GrayJoKing 🇦🇺 866 53 6 May 2022 646th DialFrost 🇸🇬 866 86 24 Oct 2024 646th stefangimmillaro 866 86 14 Jan 2025 648th dieggsy 866 97 8 Oct 2024 648th edsrzf 🇳🇿 866 97 8 Dec 2024 650th lukehewittvandy 866 135 18 Jul 2022 650th OriEy 866 135 27 Apr 2023 650th Maximizer02 866 135 8 Jun 2024 650th 0dyse 866 135 23 Apr 2025 654th jacobly0 🇺🇸 866 153 26 Sep 2023 655th Andriamanitra 🇫🇮 863 54 21 Jul 2022 655th jared-hughes 863 54 12 Sep 2022 655th OhmNomNom 863 54 7 Oct 2022 655th olleicua 🇺🇸 863 54 21 Jan 2024 655th LostSyntax21 🇬🇧 863 54 12 Mar 2025 655th AbrahamJLR 863 54 29 hours ago 661st deadp4nda 🇩🇪 863 90 26 Apr 2024 662nd DialFrost 🇸🇬 862 64 10 Jul 2024 663rd Shanethegamer 🇺🇸 862 70 12 Dec 2022 663rd Alessandro-Balconi 🇮🇹 862 70 26 Dec 2022 665th Grrisly 862 114 25 Mar 2024 666th mtirado1 861 75 13 Aug 2022 667th Steffan153 🇫🇮 861 82 23 Feb 2023 668th MeWhenI 🇻🇦 861 85 27 Jun 2022 668th Shanethegamer 🇺🇸 861 85 15 May 2023 670th TylerBloom 861 96 22 Mar 2024 671st shellbertt 🇨🇦 861 98 9 May 2022 671st iakolzin 861 98 26 May 2022 671st Betuaredead 861 98 5 Jan 2023 671st oceko 861 98 19 Feb 2024 671st dokutan 861 98 17 Mar 2024 Prev 601–675 of 3,059 Next