The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 3 hours. Why not try and solve them ahead of time?
Niven Numbers 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 711th Betuaredead 928 87 284ms 11 Nov 2023 711th kkoenig 928 87 304ms 7 Jan 2024 711th pardouin 🇫🇷 928 87 287ms 29 Sep 2024 711th fuzzylojik-golf 🇺🇸 928 87 297ms 15 Jul 2025 711th GolfingSuccess 🇬🇷 928 87 285ms 10 Aug 2025 711th CaedenHarper 🇨🇦 928 87 323ms 5 Nov 2025 711th b-illy 🇬🇧 928 87 304ms 8 Dec 2025 711th KasperKivimaeki 🇫🇮 928 87 287ms 10 Dec 2025 711th albanian-laundromat 928 87 291ms 15 Dec 2025 730th JayXon 🇺🇸 927 46 1,302ms 1 Mar 2021 730th Lydxn 🇨🇦 927 46 1,343ms 9 Oct 2021 732nd sisyphus-ppcg 🇦🇺 927 53 110ms 14 Oct 2022 732nd Lydxn 🇨🇦 927 53 112ms 14 Oct 2022 732nd JayXon 🇺🇸 927 53 114ms 14 Oct 2022 732nd stefangimmillaro 927 53 108ms 15 Oct 2022 732nd Steffan153 🇫🇮 927 53 109ms 17 Nov 2022 732nd prplz 🇦🇺 927 53 118ms 24 Nov 2022 732nd sean-niemann 🇺🇸 927 53 116ms 17 Feb 2023 732nd Shanethegamer 🇺🇸 927 53 122ms 8 Mar 2023 732nd m-tkach 🇺🇦 927 53 119ms 2 Jun 2023 732nd Alex-x90 🇺🇸 927 53 119ms 17 Jul 2023 732nd DialFrost 🇸🇬 927 53 108ms 26 Oct 2023 732nd Betuaredead 927 53 121ms 13 Nov 2023 732nd Yewzir 🇧🇪 927 53 114ms 14 Nov 2023 732nd pardouin 🇫🇷 927 53 110ms 21 Aug 2024 732nd voytxt 🇨🇿 927 53 107ms 12 Jan 2025 732nd edsrzf 🇳🇿 927 53 114ms 26 Jul 2025 732nd fuzzylojik-golf 🇺🇸 927 53 109ms 28 Aug 2025 732nd snoozingnewt 🇨🇦 927 53 106ms 4 Dec 2025 732nd dokutan 927 53 109ms 26 Feb 2026 751st cure-honey 🇯🇵 927 62 123ms 29 Jun 2021 751st nipzu 927 62 126ms 13 Jan 2022 751st Creative0708 🇨🇦 927 62 122ms 16 Dec 2023 751st okaponta 927 62 123ms 11 Jan 2024 751st ian-h-chamberlain 🇺🇸 927 62 122ms 3 Nov 2025 751st luuumine 🇫🇷 927 62 127ms 11 Nov 2025 757th michael-pruglo 🇺🇦 927 69 57ms 13 Jul 2022 757th qwertyuiop3 🇷🇺 927 69 57ms 14 May 2025 759th ovs-code 🇩🇪 926 50 2ms 9 Sep 2022 759th Shanethegamer 🇺🇸 926 50 2ms 9 Sep 2022 759th Lydxn 🇨🇦 926 50 2ms 9 Sep 2022 759th MeWhenI 🇻🇦 926 50 2ms 10 Sep 2022 759th JayXon 🇺🇸 926 50 2ms 10 Sep 2022 759th sean-niemann 🇺🇸 926 50 2ms 10 Sep 2022 759th GrayJoKing 🇦🇺 926 50 2ms 11 Sep 2022 759th btnlq 926 50 2ms 13 Sep 2022 759th clockworknazo 926 50 2ms 12 Oct 2022 759th prplz 🇦🇺 926 50 2ms 30 Nov 2022 759th Steffan153 🇫🇮 926 50 2ms 30 Nov 2022 759th DialFrost 🇸🇬 926 50 2ms 26 Jan 2023 759th inventshah 926 50 2ms 26 Jan 2023 759th m-tkach 🇺🇦 926 50 2ms 2 Jun 2023 759th sisyphus-ppcg 🇦🇺 926 50 2ms 29 Oct 2023 759th Betuaredead 926 50 2ms 13 Nov 2023 759th Yewzir 🇧🇪 926 50 2ms 14 Nov 2023 759th pardouin 🇫🇷 926 50 2ms 22 Aug 2024 759th fuzzylojik-golf 🇺🇸 926 50 2ms 18 Jul 2025 759th GolfingSuccess 🇬🇷 926 50 2ms 10 Aug 2025 759th albanian-laundromat 926 50 2ms 16 Sep 2025 759th snoozingnewt 🇨🇦 926 50 2ms 9 Dec 2025 759th dokutan 926 50 2ms 26 Feb 2026 782nd Attero 🇸🇪 925 47 1ms 29 Mar 2020 782nd Irratix 🇳🇱 925 47 1ms 15 Jan 2021 782nd GalladeGuy 🇺🇸 925 47 1ms 15 Dec 2024 782nd TheDrawingCoder-Gamer 925 47 1ms 3 Jul 2025 782nd snoozingnewt 🇨🇦 925 47 2ms 23 Dec 2025 787th Lydxn 🇨🇦 924 40 9ms 4 Jan 2022 787th saito-ta 🇯🇵 924 40 2ms 9 Nov 2023 787th Steffan153 🇫🇮 924 40 2ms 12 Feb 2026 790th GrayJoKing 🇦🇺 924 46 3ms 29 Sep 2022 790th Lydxn 🇨🇦 924 46 3ms 29 Sep 2022 790th ovs-code 🇩🇪 924 46 3ms 29 Sep 2022 790th clockworknazo 924 46 3ms 30 Sep 2022 790th DialFrost 🇸🇬 924 46 3ms 29 Jan 2023 790th Steffan153 🇫🇮 924 46 3ms 3 Feb 2023 790th sisyphus-ppcg 🇦🇺 924 46 3ms 6 Feb 2023 790th prplz 🇦🇺 924 46 3ms 16 May 2023 790th sean-niemann 🇺🇸 924 46 3ms 23 Oct 2023 790th xsot 🇸🇬 924 46 3ms 8 Feb 2024 790th Yewzir 🇧🇪 924 46 3ms 2 Mar 2024 First Prev 721–800 of 4,227 Next Last