The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 6 days. Why not try and solve them ahead of time?
Niven Numbers (Long) in all languages in bytes. 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 Bytes Time Submitted 875th stefangimmillaro 875 54 7ms 15 Oct 2023 875th sean-niemann 🇺🇸 875 54 7ms 4 Nov 2023 883rd canissimia 🇦🇶 875 149 3,145ms 23 Jul 2023 884th primo-ppcg 🇹🇭 875 184 54ms 13 Aug 2025 885th GrayJoKing 🇦🇺 873 37 31ms 13 Aug 2022 886th guilhem-roy 🇫🇷 873 56 17ms 8 Aug 2022 886th btjones0 873 56 17ms 30 Aug 2022 886th jfallon1997 873 56 18ms 6 Sep 2022 886th suwat513 873 56 16ms 24 Sep 2022 886th StefanHabel 🇨🇦 873 56 17ms 5 Dec 2022 886th LeeCamp 873 56 17ms 12 Jan 2023 886th SirFireball3521 873 56 17ms 9 Feb 2023 886th randolchance 873 56 17ms 9 Feb 2023 886th TaserTheFox 🇺🇸 873 56 17ms 7 Apr 2023 886th TheoKeller1 873 56 16ms 11 Jun 2023 886th kaptsanovb 873 56 16ms 13 Jun 2023 886th BREMAUCY 🇫🇷 873 56 17ms 13 Jul 2023 886th cros107 🇦🇺 873 56 17ms 21 Jul 2023 886th primo-ppcg 🇹🇭 873 56 152ms 3 Aug 2023 886th FortuiteMan 🇫🇷 873 56 17ms 23 Sep 2023 886th minhtrancccp 873 56 17ms 17 Oct 2023 886th mikehanus 873 56 17ms 22 Nov 2023 886th NickTheEASDude 🇺🇸 873 56 17ms 9 Apr 2024 886th wuzekai518 873 56 16ms 19 Jul 2024 886th codingisgreatbutiamnot 873 56 17ms 7 Aug 2024 886th alemelis 873 56 17ms 31 Aug 2024 886th hiichbindermax 873 56 16ms 16 Sep 2024 886th Powerroff 873 56 17ms 11 Nov 2024 886th Europe2048 873 56 19ms 24 Nov 2024 886th agreegious 873 56 17ms 16 Mar 2025 886th qpwoeirut 873 56 17ms 13 Aug 2025 886th ApoChagi 873 56 16ms 17 Oct 2025 886th butnaruteodor 873 56 17ms 30 Oct 2025 914th jared-hughes 873 88 50ms 14 Aug 2022 914th MeWhenI 🇻🇦 873 88 60ms 21 Feb 2023 914th Yewzir 🇧🇪 873 88 65ms 10 Apr 2024 914th BlankSpruce 873 88 61ms 13 Nov 2024 914th DialFrost 🇸🇬 873 88 45ms 11 Apr 2025 914th pardouin 🇫🇷 873 88 47ms 25 Apr 2025 914th qwertyuiop3 🇷🇺 873 88 67ms 16 May 2025 914th Herbert00709 🇵🇱 873 88 61ms 7 days ago 922nd pardouin 🇫🇷 873 138 1,727ms 14 Sep 2025 923rd Steffan153 🇫🇮 872 66 40ms 28 Jul 2024 923rd pardouin 🇫🇷 872 66 42ms 17 Mar 2025 923rd DialFrost 🇸🇬 872 66 40ms 11 Apr 2025 926th MeWhenI 🇻🇦 872 125 1,412ms 28 Mar 2025 927th jared-hughes 872 165 25ms 18 Dec 2024 928th MeWhenI 🇻🇦 871 95 16ms 21 Feb 2023 928th Yewzir 🇧🇪 871 95 16ms 4 May 2024 930th emgordon154 870 85 368ms 9 Feb 2026 931st GolfingSuccess 🇬🇷 870 94 60ms 24 days ago 931st kg583 🇺🇸 870 94 89ms 20 days ago 931st Steffan153 🇫🇮 870 94 55ms 4 days ago 934th MeWhenI 🇻🇦 870 101 25ms 21 Feb 2023 935th JPRuskin 🇬🇧 868 42 4,199ms 26 Apr 2024 935th 5quiwyrm 868 42 4,211ms 10 Dec 2024 937th sidok 868 45 372ms 5 May 2024 938th Shanethegamer 🇺🇸 868 92 114ms 15 Apr 2025 938th emgordon154 868 92 119ms 29 Nov 2025 940th primo-ppcg 🇹🇭 866 139 1,747ms 15 Sep 2025 940th MeWhenI 🇻🇦 866 139 1,673ms 7 Nov 2025 940th Yewzir 🇧🇪 866 139 1,966ms 14 Nov 2025 943rd pardouin 🇫🇷 865 63 21ms 21 Oct 2024 944th NewDefectus 🇮🇱 865 68 2ms 9 Aug 2022 944th pardouin 🇫🇷 865 68 2ms 21 Oct 2024 944th DialFrost 🇸🇬 865 68 2ms 11 Apr 2025 944th madex 🇩🇪 865 68 3ms 5 days ago 948th primo-ppcg 🇹🇭 865 75 386ms 4 Sep 2022 948th m-tkach 🇺🇦 865 75 398ms 2 Jun 2023 948th Yewzir 🇧🇪 865 75 404ms 10 Apr 2024 948th b-illy 🇬🇧 865 75 436ms 8 Dec 2025 948th CaedenHarper 🇨🇦 865 75 435ms 8 Dec 2025 953rd gifti258 864 59 74ms 15 Sep 2023 954th KasperKivimaeki 🇫🇮 864 89 57ms 26 Oct 2025 955th inventshah 863 54 98ms 12 Dec 2022 955th MeWhenI 🇻🇦 863 54 94ms 13 Dec 2022 955th Alessandro-Balconi 🇮🇹 863 54 97ms 15 Jul 2023 958th Shanethegamer 🇺🇸 863 55 281ms 3 Aug 2024 958th DialFrost 🇸🇬 863 55 243ms 4 Aug 2024 958th sisyphus-ppcg 🇦🇺 863 55 142ms 6 Aug 2024 First Prev 881–960 of 2,559 Next Last
