The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 5 days. Why not try and solve them ahead of time?
Divisors in all languages in chars. Achievements Cheevos Holes Languages Medals Miscellaneous 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 Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions 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 Multitap Input 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 Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang 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 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang 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 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily 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 Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions 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 Multitap Input 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 Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 212th stackofbears 952 66 117ms 8 Sep 2023 212th btnlq 952 66 117ms 14 Oct 2023 212th DialFrost 🇸🇬 952 66 121ms 5 Aug 2024 212th pardouin 🇫🇷 952 66 116ms 5 Sep 2024 212th sean-niemann 🇺🇸 952 66 118ms 20 Dec 2024 212th Natanaelel 🇸🇪 952 66 117ms 12 May 2025 212th fuzzylojik-golf 🇺🇸 952 66 119ms 26 Aug 2025 212th iczelia 🇩🇪 952 66 124ms 16 Oct 2025 212th snoozingnewt 🇨🇦 952 66 130ms 5 Dec 2025 212th edsrzf 🇳🇿 952 66 130ms 4 hours ago 251st Lydxn 🇨🇦 950 22 2ms 13 Jan 2022 251st SirBogman 🇺🇸 950 22 2ms 27 Mar 2022 251st Steffan153 🇫🇮 950 22 3ms 8 Feb 2023 251st Natanaelel 🇸🇪 950 22 2ms 21 Oct 2023 251st DialFrost 🇸🇬 950 22 2ms 31 Jan 2024 251st fuzzylojik-golf 🇺🇸 950 22 2ms 17 Sep 2025 251st emgordon154 950 22 2ms 7 Oct 2025 258th Lydxn 🇨🇦 950 45 450ms 16 Jan 2024 258th GolfingSuccess 🇬🇷 950 45 434ms 6 May 2025 258th fuzzylojik-golf 🇺🇸 950 45 418ms 29 Jul 2025 258th Babafaba 950 45 430ms 26 Nov 2025 262nd ntsd 🇹🇭 950 56 11ms 18 Oct 2019 262nd ssiquoya 🇷🇺 950 56 11ms 30 Aug 2020 262nd vezzick 950 56 12ms 8 Mar 2021 262nd shellbertt 🇨🇦 950 56 10ms 5 Nov 2021 262nd gitbedd 🇬🇧 950 56 12ms 10 Jan 2022 262nd CarsonChr 🇺🇸 950 56 11ms 18 Sep 2022 262nd 2011-Chan-Ethan 950 56 11ms 6 Jul 2023 262nd keelimeguy 🇺🇸 950 56 11ms 7 Nov 2023 262nd SB-945 950 56 11ms 8 Feb 2024 262nd FCORMERAIS 950 56 10ms 4 Mar 2024 262nd jatloe 950 56 11ms 11 May 2024 262nd Artemis21 🇬🇧 950 56 11ms 3 Jan 2025 262nd JOrE20 950 56 11ms 21 Feb 2026 275th MLJWare 949 68 1ms 20 Jul 2018 275th cafehaine 🇫🇷 949 68 1ms 9 Apr 2019 275th primo-ppcg 🇹🇭 949 68 2ms 15 Feb 2020 275th prplz 🇦🇺 949 68 1ms 24 Feb 2020 275th Attero 🇸🇪 949 68 2ms 8 Mar 2020 275th GalladeGuy 🇺🇸 949 68 1ms 21 May 2020 275th Waffle3z 949 68 1ms 14 Oct 2020 275th Jiramide 949 68 2ms 17 Oct 2020 275th Irratix 🇳🇱 949 68 1ms 15 Jan 2021 275th DaDerpDuck 949 68 2ms 21 Jan 2021 275th GrayJoKing 🇦🇺 949 68 1ms 21 Jan 2021 275th sisyphus-ppcg 🇦🇺 949 68 1ms 8 Jun 2021 275th Shanethegamer 🇺🇸 949 68 2ms 20 Jul 2021 275th JayXon 🇺🇸 949 68 2ms 14 Sep 2021 275th jared-hughes 949 68 2ms 16 Feb 2022 275th btnlq 949 68 2ms 25 Dec 2022 275th GoateSo 949 68 1ms 14 Aug 2023 275th jipsong 🇩🇪 949 68 2ms 28 Aug 2023 275th jacobly0 🇺🇸 949 68 2ms 30 Aug 2023 275th adriweb 🇫🇷 949 68 2ms 25 Sep 2023 275th FlyingPenguin223 949 68 1ms 29 Oct 2023 275th dokutan 949 68 1ms 18 Nov 2023 275th xsot 🇸🇬 949 68 1ms 12 Feb 2024 275th RockOfStone 949 68 1ms 23 Mar 2024 275th DialFrost 🇸🇬 949 68 1ms 15 Sep 2024 275th pardouin 🇫🇷 949 68 1ms 21 Sep 2024 275th sean-niemann 🇺🇸 949 68 1ms 7 Oct 2024 275th edsrzf 🇳🇿 949 68 2ms 4 Apr 2025 275th synt7x 🇺🇸 949 68 2ms 5 Jul 2025 275th fuzzylojik-golf 🇺🇸 949 68 2ms 9 Jul 2025 275th GolfingSuccess 🇬🇷 949 68 1ms 12 Nov 2025 275th snoozingnewt 🇨🇦 949 68 1ms 3 Dec 2025 275th Steffan153 🇫🇮 949 68 2ms 11 Feb 2026 275th frosster 🇨🇦 949 68 2ms 11 Feb 2026 309th thospel 948 24 156ms 19 Apr 2018 309th AlexDaniel 🇪🇪 948 24 145ms 13 May 2018 309th Attero 🇸🇪 948 24 136ms 13 May 2020 312th MeWhenI 🇻🇦 948 32 16ms 21 Jun 2022 313th ovs-code 🇩🇪 948 35 79ms 11 Dec 2022 313th sisyphus-ppcg 🇦🇺 948 35 80ms 12 Dec 2022 313th Lydxn 🇨🇦 948 35 84ms 12 Dec 2022 313th prplz 🇦🇺 948 35 81ms 12 Dec 2022 313th clockworknazo 948 35 94ms 12 Dec 2022 313th Steffan153 🇫🇮 948 35 82ms 13 Dec 2022 313th sean-niemann 🇺🇸 948 35 84ms 16 Dec 2022 313th Alessandro-Balconi 🇮🇹 948 35 81ms 26 Dec 2022 First Prev 241–320 of 5,503 Next Last
