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 Minesweeper 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 Trinomial Triangle 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 NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi 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 Luau 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 Luau 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 Minesweeper 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 Trinomial Triangle 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 NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi Turtle Tutorial # Golfer Points Chars Time Submitted 301st Steffan153 🇫🇮 914 76 12ms 15 May 2023 301st primo-ppcg 🇹🇭 914 76 23ms 15 May 2023 301st Lydxn 🇨🇦 914 76 10ms 22 May 2023 301st GrayJoKing 🇦🇺 914 76 12ms 24 Aug 2023 305th arctouch-cristiannevianna 913 85 366ms 3 Apr 2023 305th Widgitty 913 85 356ms 1 Sep 2023 305th tomtheisen 🇺🇸 913 85 340ms 10 Apr 2025 308th edsrzf 🇳🇿 912 54 1,330ms 13 Sep 2025 308th CaedenHarper 🇨🇦 912 54 1,218ms 27 Sep 2025 308th sean-niemann 🇺🇸 912 54 1,376ms 27 Sep 2025 311th primo-ppcg 🇹🇭 911 61 6ms 6 May 2022 311th sisyphus-ppcg 🇦🇺 911 61 10ms 14 Jul 2022 313th Lydxn 🇨🇦 911 70 96ms 7 May 2022 313th JayXon 🇺🇸 911 70 96ms 7 May 2022 315th Steffan153 🇫🇮 911 71 117ms 14 Oct 2022 315th Shanethegamer 🇺🇸 911 71 107ms 15 Oct 2022 315th stefangimmillaro 911 71 111ms 16 Oct 2022 315th MeWhenI 🇻🇦 911 71 115ms 16 Oct 2022 315th Steffan153 🇫🇮 911 71 6ms 10 Dec 2022 315th synt7x 🇺🇸 911 71 4ms 7 Jul 2025 321st pardouin 🇫🇷 911 72 3,105ms 21 May 2025 322nd annaproxy 911 78 128ms 13 Jan 2023 322nd IanUtley 911 78 119ms 12 Nov 2023 322nd GrayJoKing 🇦🇺 911 78 84ms 28 Nov 2023 322nd edsrzf 🇳🇿 911 78 21ms 16 Aug 2025 326th Bubbler-4 910 33 2,543ms 6 May 2022 326th rak1507 🇬🇧 910 33 111ms 8 May 2022 326th ngn 🇧🇬 910 33 26ms 11 May 2022 326th zacjl 910 33 32ms 3 Jun 2025 326th GrayJoKing 🇦🇺 910 33 15ms 4 Jun 2025 331st Shanethegamer 🇺🇸 910 86 390ms 15 May 2023 331st JayXon 🇺🇸 910 86 508ms 15 May 2023 331st Steffan153 🇫🇮 910 86 389ms 16 May 2023 331st Lydxn 🇨🇦 910 86 465ms 16 May 2023 331st GrayJoKing 🇦🇺 910 86 400ms 11 Aug 2023 331st sean-niemann 🇺🇸 910 86 458ms 11 Jul 2024 337th andersk 🇺🇸 910 91 124ms 25 Oct 2022 337th Super-Pizza 🇨🇦 910 91 121ms 4 Dec 2022 337th klixel 🇨🇦 910 91 122ms 20 May 2023 337th lynn 910 91 121ms 6 Jul 2024 337th edsrzf 🇳🇿 910 91 121ms 29 Nov 2024 337th DialFrost 🇸🇬 910 91 123ms 7 Apr 2025 343rd Lydxn 🇨🇦 909 47 285ms 5 May 2022 344th JayXon 🇺🇸 909 53 443ms 17 Aug 2024 345th tailorspy 909 93 71ms 27 May 2024 345th sean-niemann 🇺🇸 909 93 65ms 9 Jun 2025 345th KasperKivimaeki 🇫🇮 909 93 57ms 10 days ago 348th Lydxn 🇨🇦 908 81 45ms 1 Apr 2023 349th Shanethegamer 🇺🇸 907 61 5ms 9 Oct 2023 349th edsrzf 🇳🇿 907 61 4ms 4 Jul 2025 351st nai62 907 68 8ms 27 Aug 2022 352nd ovs-code 🇩🇪 907 75 74ms 12 Sep 2024 352nd Kacarott 🇦🇺 907 75 78ms 13 Sep 2024 354th GrayJoKing 🇦🇺 906 74 81ms 1 Nov 2023 355th ovs-code 🇩🇪 905 67 92ms 13 Dec 2022 355th Steffan153 🇫🇮 905 67 99ms 18 Dec 2022 355th Lydxn 🇨🇦 905 67 105ms 4 Feb 2023 355th DialFrost 🇸🇬 905 67 90ms 17 Mar 2025 359th lynn 905 78 1,390ms 5 May 2022 360th Lydxn 🇨🇦 905 107 290ms 6 May 2022 360th CaedenHarper 🇨🇦 905 107 237ms 5 Oct 2025 362nd KrausRaus 🇺🇸 903 59 11ms 4 May 2022 362nd voytxt 🇨🇿 903 59 15ms 4 May 2022 362nd KingSkyrock 🇺🇸 903 59 11ms 18 May 2022 362nd ZakkkkAttackkkk 🇵🇭 903 59 10ms 14 Jul 2022 362nd aksyristos 903 59 10ms 28 Oct 2022 362nd nstearns96 🇬🇧 903 59 11ms 28 Nov 2022 362nd janbehrens 🇩🇪 903 59 13ms 17 May 2023 362nd Shanethegamer 🇺🇸 903 59 11ms 25 May 2023 362nd Maznek 903 59 10ms 26 Jun 2023 362nd SpiritAxolotl 🇺🇸 903 59 14ms 20 Mar 2024 362nd Andrey-Plotnikov 903 59 10ms 19 May 2024 362nd emgordon154 903 59 11ms 5 Aug 2024 362nd duckyluuk 🇳🇱 903 59 9ms 3 Oct 2024 362nd lifthrasiir 🇰🇷 903 59 11ms 23 Nov 2024 First Prev 301–375 of 3,400 Next Last