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 Mandelbrot 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 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 Vala 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 Vala 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 Mandelbrot 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 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 671st Irratix 🇳🇱 868 71 13 Jun 2022 671st michael-pruglo 🇺🇦 868 71 13 Jul 2022 671st stefangimmillaro 868 71 2 Jun 2023 671st kkoenig 868 71 21 Dec 2023 671st JohandeRuiter 🇳🇱 868 71 14 Sep 2024 671st masinag 🇮🇹 868 71 6 Oct 2024 671st KasperKivimaeki 🇫🇮 868 71 27 Mar 2025 683rd AlephSquirrel 867 80 20 Apr 2023 683rd ashtraypettingzoo 🇺🇸 867 80 1 Apr 2024 685th nwellnhof 🇩🇪 866 53 4 May 2022 685th GrayJoKing 🇦🇺 866 53 6 May 2022 687th DialFrost 🇸🇬 866 86 24 Oct 2024 687th stefangimmillaro 866 86 14 Jan 2025 689th dieggsy 866 97 8 Oct 2024 690th lukehewittvandy 866 135 18 Jul 2022 690th OriEy 866 135 27 Apr 2023 690th Maximizer02 866 135 8 Jun 2024 690th 0dyse 866 135 23 Apr 2025 694th jacobly0 🇺🇸 866 153 26 Sep 2023 695th primo-ppcg 🇹🇭 866 208 7 days ago 696th Andriamanitra 🇫🇮 864 54 21 Jul 2022 696th jared-hughes 864 54 12 Sep 2022 696th OhmNomNom 864 54 7 Oct 2022 696th olleicua 🇺🇸 864 54 21 Jan 2024 696th LostSyntax21 🇬🇧 864 54 12 Mar 2025 696th AbrahamJLR 864 54 4 Jun 2025 702nd Shanethegamer 🇺🇸 864 70 12 Dec 2022 702nd Alessandro-Balconi 🇮🇹 864 70 26 Dec 2022 704th DialFrost 🇸🇬 862 64 10 Jul 2024 705th Grrisly 862 114 25 Mar 2024 706th mtirado1 861 75 13 Aug 2022 707th Steffan153 🇫🇮 861 82 23 Feb 2023 708th MeWhenI 🇻🇦 861 85 27 Jun 2022 708th Shanethegamer 🇺🇸 861 85 15 May 2023 710th tomh1012 861 90 5 May 2022 710th deadp4nda 🇩🇪 861 90 26 Apr 2024 710th 123mjb 861 90 9 days ago 713th TylerBloom 861 96 22 Mar 2024 714th shellbertt 🇨🇦 861 98 9 May 2022 714th iakolzin 861 98 26 May 2022 714th Betuaredead 861 98 5 Jan 2023 714th oceko 861 98 19 Feb 2024 714th dokutan 861 98 17 Mar 2024 714th cuzdav 861 98 4 May 2025 720th MeWhenI 🇻🇦 860 154 10 Oct 2023 721st GrayJoKing 🇦🇺 859 56 15 Jan 2024 721st AlephSquirrel 859 56 21 Jan 2024 723rd Setvizan 859 62 12 Jan 2023 723rd GreenBeansAgainstVeganism 859 62 13 Jan 2023 723rd arctouch-cristiannevianna 859 62 3 Apr 2023 723rd Corxldyphik 859 62 11 Apr 2023 723rd Blockyheadman 859 62 1 Nov 2023 723rd ollyspooner 859 62 22 Nov 2023 723rd itserasmus 859 62 25 Jan 2024 723rd Jacob385 859 62 13 Mar 2024 723rd junkondo-jp 859 62 30 Jun 2024 723rd ShiraJoseph 🇺🇸 859 62 1 Mar 2025 733rd yzhs 🇩🇪 859 65 16 Jun 2022 733rd rollershutter 859 65 9 Sep 2022 733rd bac0id 859 65 26 Sep 2023 733rd mossiegoat 859 65 25 days ago 737th ovs-code 🇩🇪 859 133 8 Jul 2024 738th crizin 🇰🇷 859 136 9 Sep 2023 738th TheZwierzLF 🇵🇱 859 136 2 Jun 2025 740th ulucs 858 35 8 May 2022 740th bstrat 858 35 6 Jun 2024 740th wh3n3v3r 🇨🇿 858 35 18 Nov 2024 743rd Andriamanitra 🇫🇮 858 67 26 Apr 2023 744th steffan-polygolf 858 73 23 Feb 2023 744th MWI-polygolf 858 73 6 Dec 2023 744th HumanoidCPU 858 73 7 May 2024 747th Steffan153 🇫🇮 858 78 4 Feb 2023 748th 5quiwyrm 857 52 4 Sep 2022 748th MeWhenI 🇻🇦 857 52 28 Jan 2023 748th Feniske 🇫🇷 857 52 7 Nov 2023 Prev 676–750 of 3,146 Next