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 593rd gallium-gonzollium 872 64 26 Aug 2024 602nd GrayJoKing 🇦🇺 872 84 19 Jun 2022 602nd primo-ppcg 🇹🇭 872 84 29 Jun 2022 604th althryenix 872 134 25 Jul 2022 604th MrGagnonHPS 872 134 1 Nov 2023 604th noescareno 872 134 19 days ago 604th Schmitt-Very-Cool 872 134 3 days ago 608th Shanethegamer 🇺🇸 872 152 9 Sep 2023 608th emgordon154 872 152 2 Oct 2024 608th DialFrost 🇸🇬 872 152 27 Oct 2024 611th HPWiz 🇳🇿 871 49 4 May 2022 611th JayXon 🇺🇸 871 49 5 May 2022 611th Steffan153 🇫🇮 871 49 10 Dec 2022 611th ovs-code 🇩🇪 871 49 24 Oct 2023 611th sean-niemann 🇺🇸 871 49 12 Jul 2024 616th Shanethegamer 🇺🇸 871 66 4 May 2022 616th scpchicken 🇵🇼 871 66 5 May 2022 616th sisyphus-ppcg 🇦🇺 871 66 6 May 2022 616th Natanaelel 🇸🇪 871 66 15 Jun 2022 616th Z-snails 871 66 27 Feb 2023 616th Jeremy-Stafford 871 66 27 Feb 2023 616th alomiF 871 66 1 Sep 2023 616th btnlq 871 66 17 Oct 2023 624th dokutan 870 62 28 Apr 2025 625th johnnythedoggie 870 72 13 May 2022 626th DialFrost 🇸🇬 870 73 16 days ago 627th inventshah 870 97 6 May 2022 627th roupiq 🇵🇱 870 97 22 Nov 2023 629th MeWhenI 🇻🇦 870 207 21 Apr 2025 630th janbehrens 🇩🇪 869 90 21 Apr 2023 630th Yewzir 🇧🇪 869 90 22 Apr 2023 630th DialFrost 🇸🇬 869 90 6 Nov 2023 630th Ripick 869 90 27 Nov 2024 634th GolfingSuccess 🇬🇷 868 71 5 May 2022 634th emplv 🇱🇻 868 71 5 May 2022 634th JayXon 🇺🇸 868 71 7 May 2022 634th m-tkach 🇺🇦 868 71 15 May 2022 634th nwellnhof 🇩🇪 868 71 5 Jun 2022 634th Irratix 🇳🇱 868 71 13 Jun 2022 634th michael-pruglo 🇺🇦 868 71 13 Jul 2022 634th stefangimmillaro 868 71 2 Jun 2023 634th kkoenig 868 71 21 Dec 2023 634th JohandeRuiter 🇳🇱 868 71 14 Sep 2024 634th masinag 🇮🇹 868 71 6 Oct 2024 634th KasperKivimaeki 🇫🇮 868 71 27 Mar 2025 646th AlephSquirrel 867 80 20 Apr 2023 646th ashtraypettingzoo 🇺🇸 867 80 1 Apr 2024 648th nwellnhof 🇩🇪 866 53 4 May 2022 648th GrayJoKing 🇦🇺 866 53 6 May 2022 650th DialFrost 🇸🇬 866 86 24 Oct 2024 650th stefangimmillaro 866 86 14 Jan 2025 652nd dieggsy 866 97 8 Oct 2024 652nd edsrzf 🇳🇿 866 97 8 Dec 2024 654th lukehewittvandy 866 135 18 Jul 2022 654th OriEy 866 135 27 Apr 2023 654th Maximizer02 866 135 8 Jun 2024 654th 0dyse 866 135 23 Apr 2025 658th jacobly0 🇺🇸 866 153 26 Sep 2023 659th Andriamanitra 🇫🇮 864 54 21 Jul 2022 659th jared-hughes 864 54 12 Sep 2022 659th OhmNomNom 864 54 7 Oct 2022 659th olleicua 🇺🇸 864 54 21 Jan 2024 659th LostSyntax21 🇬🇧 864 54 12 Mar 2025 659th AbrahamJLR 864 54 15 days ago 665th Shanethegamer 🇺🇸 863 70 12 Dec 2022 665th Alessandro-Balconi 🇮🇹 863 70 26 Dec 2022 667th deadp4nda 🇩🇪 863 90 26 Apr 2024 668th DialFrost 🇸🇬 862 64 10 Jul 2024 669th Grrisly 862 114 25 Mar 2024 670th mtirado1 861 75 13 Aug 2022 671st Steffan153 🇫🇮 861 82 23 Feb 2023 672nd MeWhenI 🇻🇦 861 85 27 Jun 2022 672nd Shanethegamer 🇺🇸 861 85 15 May 2023 674th TylerBloom 861 96 22 Mar 2024 675th shellbertt 🇨🇦 861 98 9 May 2022 Prev 601–675 of 3,076 Next