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 597th sean-niemann 🇺🇸 871 49 12 Jul 2024 602nd Shanethegamer 🇺🇸 871 66 4 May 2022 602nd scpchicken 🇵🇼 871 66 5 May 2022 602nd sisyphus-ppcg 🇦🇺 871 66 6 May 2022 602nd Natanaelel 🇸🇪 871 66 15 Jun 2022 602nd Z-snails 871 66 27 Feb 2023 602nd Jeremy-Stafford 871 66 27 Feb 2023 602nd alomiF 871 66 1 Sep 2023 602nd btnlq 871 66 17 Oct 2023 602nd sean-niemann 🇺🇸 871 66 9 Jan 2025 611th dokutan 870 62 21 days ago 612th johnnythedoggie 870 72 13 May 2022 613th inventshah 870 97 6 May 2022 613th roupiq 🇵🇱 870 97 22 Nov 2023 615th MeWhenI 🇻🇦 870 207 21 Apr 2025 616th GolfingSuccess 🇬🇷 868 71 5 May 2022 616th emplv 🇱🇻 868 71 5 May 2022 616th JayXon 🇺🇸 868 71 7 May 2022 616th m-tkach 🇺🇦 868 71 15 May 2022 616th nwellnhof 🇩🇪 868 71 5 Jun 2022 616th Irratix 🇳🇱 868 71 13 Jun 2022 616th michael-pruglo 🇺🇦 868 71 13 Jul 2022 616th stefangimmillaro 868 71 2 Jun 2023 616th kkoenig 868 71 21 Dec 2023 616th JohandeRuiter 🇳🇱 868 71 14 Sep 2024 616th masinag 🇮🇹 868 71 6 Oct 2024 616th KasperKivimaeki 🇫🇮 868 71 27 Mar 2025 628th janbehrens 🇩🇪 868 90 21 Apr 2023 628th Yewzir 🇧🇪 868 90 22 Apr 2023 628th DialFrost 🇸🇬 868 90 6 Nov 2023 628th Ripick 868 90 27 Nov 2024 632nd AlephSquirrel 867 80 20 Apr 2023 632nd ashtraypettingzoo 🇺🇸 867 80 1 Apr 2024 634th nwellnhof 🇩🇪 866 53 4 May 2022 634th GrayJoKing 🇦🇺 866 53 6 May 2022 636th DialFrost 🇸🇬 866 86 24 Oct 2024 636th stefangimmillaro 866 86 14 Jan 2025 638th dieggsy 866 97 8 Oct 2024 638th edsrzf 🇳🇿 866 97 8 Dec 2024 640th jacobly0 🇺🇸 866 153 26 Sep 2023 641st lukehewittvandy 865 135 18 Jul 2022 641st OriEy 865 135 27 Apr 2023 641st Maximizer02 865 135 8 Jun 2024 641st 0dyse 865 135 25 days ago 645th Andriamanitra 🇫🇮 863 54 21 Jul 2022 645th jared-hughes 863 54 12 Sep 2022 645th OhmNomNom 863 54 7 Oct 2022 645th olleicua 🇺🇸 863 54 21 Jan 2024 645th LostSyntax21 🇬🇧 863 54 12 Mar 2025 650th DialFrost 🇸🇬 862 64 10 Jul 2024 651st MeWhenI 🇻🇦 862 71 13 Dec 2022 652nd deadp4nda 🇩🇪 862 90 26 Apr 2024 653rd Grrisly 862 114 25 Mar 2024 654th mtirado1 861 75 13 Aug 2022 655th Steffan153 🇫🇮 861 82 23 Feb 2023 656th MeWhenI 🇻🇦 861 85 27 Jun 2022 656th Shanethegamer 🇺🇸 861 85 15 May 2023 658th shellbertt 🇨🇦 861 98 9 May 2022 658th iakolzin 861 98 26 May 2022 658th Betuaredead 861 98 5 Jan 2023 658th oceko 861 98 19 Feb 2024 658th dokutan 861 98 17 Mar 2024 658th cuzdav 861 98 15 days ago 664th TylerBloom 860 96 22 Mar 2024 665th MeWhenI 🇻🇦 860 154 10 Oct 2023 666th yzhs 🇩🇪 859 65 16 Jun 2022 666th rollershutter 859 65 9 Sep 2022 666th bac0id 859 65 26 Sep 2023 669th ovs-code 🇩🇪 859 133 8 Jul 2024 670th crizin 🇰🇷 859 136 9 Sep 2023 671st GrayJoKing 🇦🇺 858 56 15 Jan 2024 671st AlephSquirrel 858 56 21 Jan 2024 673rd Setvizan 858 62 12 Jan 2023 673rd GreenBeansAgainstVeganism 858 62 13 Jan 2023 673rd arctouch-cristiannevianna 858 62 3 Apr 2023 Prev 601–675 of 3,024 Next