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 Hilbert Curve 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 Topological Sort 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 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 Groovy 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 Harbour Hare Haxe Hush Hy iogii Knight Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka 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 Groovy 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 Harbour Hare Haxe Hush Hy iogii Knight Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka 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 Hilbert Curve 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 Topological Sort 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 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 296th Shanethegamer 🇺🇸 914 71 15 May 2023 296th MeWhenI 🇻🇦 914 71 8 Aug 2023 296th sean-niemann 🇺🇸 914 71 9 Jan 2025 304th bac0id 914 128 29 Jun 2024 305th xnor-gate 913 63 20 Jan 2025 306th JayXon 🇺🇸 913 69 5 Apr 2023 306th Lydxn 🇨🇦 913 69 9 Apr 2023 308th Steffan153 🇫🇮 912 76 15 May 2023 308th primo-ppcg 🇹🇭 912 76 15 May 2023 308th Lydxn 🇨🇦 912 76 22 May 2023 308th GrayJoKing 🇦🇺 912 76 24 Aug 2023 312th arctouch-cristiannevianna 912 85 3 Apr 2023 312th Widgitty 912 85 1 Sep 2023 312th tomtheisen 🇺🇸 912 85 10 Apr 2025 315th primo-ppcg 🇹🇭 911 61 6 May 2022 315th sisyphus-ppcg 🇦🇺 911 61 14 Jul 2022 317th Steffan153 🇫🇮 911 71 10 Dec 2022 317th synt7x 🇺🇸 911 71 7 Jul 2025 319th Bubbler-4 910 33 6 May 2022 319th rak1507 🇬🇧 910 33 8 May 2022 319th ngn 🇧🇬 910 33 11 May 2022 319th zacjl 910 33 3 Jun 2025 319th GrayJoKing 🇦🇺 910 33 4 Jun 2025 324th Lydxn 🇨🇦 910 70 7 May 2022 324th JayXon 🇺🇸 910 70 7 May 2022 326th annaproxy 910 78 13 Jan 2023 326th IanUtley 910 78 12 Nov 2023 326th GrayJoKing 🇦🇺 910 78 28 Nov 2023 329th sean-niemann 🇺🇸 910 108 25 May 2024 330th Steffan153 🇫🇮 909 71 14 Oct 2022 330th Shanethegamer 🇺🇸 909 71 15 Oct 2022 330th stefangimmillaro 909 71 16 Oct 2022 330th MeWhenI 🇻🇦 909 71 16 Oct 2022 334th edsrzf 🇳🇿 909 78 18 days ago 335th Shanethegamer 🇺🇸 909 86 15 May 2023 335th JayXon 🇺🇸 909 86 15 May 2023 335th Steffan153 🇫🇮 909 86 16 May 2023 335th Lydxn 🇨🇦 909 86 16 May 2023 335th GrayJoKing 🇦🇺 909 86 11 Aug 2023 335th sean-niemann 🇺🇸 909 86 11 Jul 2024 341st andersk 🇺🇸 909 91 25 Oct 2022 341st Super-Pizza 🇨🇦 909 91 4 Dec 2022 341st klixel 🇨🇦 909 91 20 May 2023 341st lynn 909 91 6 Jul 2024 341st edsrzf 🇳🇿 909 91 29 Nov 2024 341st DialFrost 🇸🇬 909 91 7 Apr 2025 347th Lydxn 🇨🇦 908 47 5 May 2022 348th tailorspy 908 93 27 May 2024 348th sean-niemann 🇺🇸 908 93 9 Jun 2025 350th JayXon 🇺🇸 907 53 17 Aug 2024 351st sean-niemann 🇺🇸 907 55 5 days ago 351st edsrzf 🇳🇿 907 55 35 hours ago 353rd nai62 907 68 27 Aug 2022 354th cbrt-x 907 129 6 May 2022 354th FlorianCassayre 🇫🇷 907 129 20 Sep 2022 354th piano-miles 907 129 8 Feb 2023 354th Widgitty 907 129 29 May 2023 354th lukashert 907 129 7 Jun 2023 354th DialFrost 🇸🇬 907 129 29 Jan 2024 354th yoshykai 907 129 27 Mar 2025 361st Shanethegamer 🇺🇸 906 61 9 Oct 2023 361st edsrzf 🇳🇿 906 61 4 Jul 2025 363rd pardouin 🇫🇷 906 72 21 May 2025 364th GrayJoKing 🇦🇺 906 74 1 Nov 2023 365th ovs-code 🇩🇪 905 75 12 Sep 2024 365th Kacarott 🇦🇺 905 75 13 Sep 2024 367th lynn 905 78 5 May 2022 368th Lydxn 🇨🇦 905 81 1 Apr 2023 369th ovs-code 🇩🇪 904 67 13 Dec 2022 369th Steffan153 🇫🇮 904 67 18 Dec 2022 369th Lydxn 🇨🇦 904 67 4 Feb 2023 369th DialFrost 🇸🇬 904 67 17 Mar 2025 373rd KrausRaus 🇺🇸 903 59 4 May 2022 373rd voytxt 🇨🇿 903 59 4 May 2022 373rd KingSkyrock 🇺🇸 903 59 18 May 2022 Prev 301–375 of 3,275 Next