Collatz in C 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 59th BlankSpruce 821 78 20 Aug 2024 59th madeforlosers 821 78 5 Sep 2024 59th rniii 821 78 24 Sep 2024 59th FragmentedCurve 821 78 3 Oct 2024 59th cdesodt 821 78 10 Oct 2024 59th LvLError 821 78 29 May 2025 59th Lv0Sys 🇵🇱 821 78 30 May 2025 83rd c0d3-4-F00d 🇩🇪 810 79 5 May 2022 83rd jgbaldwinbrown 810 79 16 Jun 2022 83rd jupj 🇫🇮 810 79 12 Aug 2022 83rd tkr-sh 🇫🇷 810 79 20 Aug 2022 83rd djeedjay 🇳🇱 810 79 15 Sep 2022 83rd ValentinCassayre 810 79 8 Oct 2022 83rd namcartoon06 810 79 30 Jun 2023 83rd Us1ngTh3Hub 810 79 8 Jul 2023 83rd Widgitty 810 79 30 Aug 2023 83rd Grrisly 810 79 10 Nov 2023 83rd trist224 🇫🇷 810 79 14 Feb 2024 83rd mathisfun271 810 79 19 Feb 2024 83rd retrohun 810 79 29 Mar 2024 83rd HumanoidCPU 810 79 6 May 2024 83rd funnyboy-roks 810 79 14 Jun 2024 83rd bac0id 810 79 29 Jun 2024 83rd TeodorDyakov 🇧🇬 810 79 6 hours ago 100th Seek64 🇩🇪 800 80 11 Nov 2022 100th tvcv901 800 80 22 Mar 2023 100th kyleclaassen 800 80 20 May 2023 100th logvp 800 80 1 Feb 2024 100th ei14 800 80 9 May 2024 100th elttil 800 80 8 Jun 2024 100th CaedenHarper 🇨🇦 800 80 26 Jan 2025 107th MinorLegato 🇸🇪 790 81 9 May 2022 107th slerpyyy 🇩🇪 790 81 21 Oct 2022 107th violeta-desantis 790 81 22 Sep 2023 107th SebastianoTaddei 790 81 4 Oct 2024 111th Ripick 780 82 10 Nov 2022 111th pandapawskat 780 82 13 Jan 2023 111th annoj 780 82 18 Jan 2023 111th CatsAreFluffy 780 82 18 Feb 2023 111th trinityy-7 780 82 11 Aug 2023 111th nyoshe 780 82 9 Dec 2023 111th NickTheEASDude 🇺🇸 780 82 26 Jan 2024 111th LHLaurini 🇧🇷 780 82 26 Jun 2024 111th lgrandco 780 82 9 Oct 2024 120th Anonymousellama21 771 83 15 Jun 2022 120th cmayer777 771 83 15 Oct 2022 120th nstearns96 🇬🇧 771 83 16 Nov 2022 120th osmith93 771 83 13 Dec 2022 120th mhgockel 771 83 15 Apr 2023 120th funnsam 🇭🇰 771 83 25 Jul 2023 120th mousetail 🇳🇱 771 83 10 May 2024 127th guilhem-roy 🇫🇷 762 84 5 May 2022 127th resetcentral 762 84 22 May 2022 127th Adrien-AM 762 84 12 Sep 2022 127th ibrahimhanifceker 762 84 9 Aug 2024 127th James-Oswald 🇺🇸 762 84 23 Aug 2024 127th h-hh-hhh 🇺🇦 762 84 6 Nov 2024 133rd ms-tingliang 753 85 5 Aug 2022 133rd aubergine-sauce 753 85 26 May 2023 133rd kallmi28 🇨🇿 753 85 13 Nov 2023 133rd azka1368 753 85 23 Nov 2023 133rd iilegacyyii 753 85 22 Jan 2024 133rd f-tucker 753 85 6 Feb 2024 133rd Stockoh 🇫🇷 753 85 29 Sep 2024 140th garrisonhh 744 86 22 Oct 2022 140th tpasfieldERAU 744 86 5 Nov 2022 140th isaiah0311 744 86 16 Feb 2023 140th piano-miles 744 86 30 Mar 2023 144th razetime 736 87 22 Aug 2022 145th james-downey 727 88 9 Jul 2022 145th jhpaques 🇫🇷 727 88 4 Dec 2022 145th mamalakic 727 88 1 Mar 2023 145th xNaCly 🇩🇪 727 88 5 Jul 2023 145th KrausRaus 🇺🇸 727 88 31 Jul 2023 145th dranjohn 727 88 17 Sep 2023 Prev 76–150 of 219 Next