The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 2 days. Why not try and solve them ahead of time?
Abundant Numbers (Long) 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 719th snoozingnewt 🇨🇦 864 74 146ms 9 Oct 2025 722nd DialFrost 🇸🇬 864 141 1,498ms 28 Mar 2025 722nd emgordon154 864 141 1,463ms 28 Mar 2025 722nd Shanethegamer 🇺🇸 864 141 1,468ms 10 Apr 2025 725th Feniske 🇫🇷 863 49 2,081ms 21 Nov 2022 725th 5quiwyrm 863 49 1,952ms 12 Dec 2024 725th DialFrost 🇸🇬 863 49 2,621ms 26 Aug 2025 728th DestyNova 🇮🇪 863 71 129ms 24 Jan 2023 729th Kaffeleif 863 76 53ms 15 Dec 2023 730th primo-ppcg 🇹🇭 862 40 146ms 20 Nov 2022 731st ovs-code 🇩🇪 862 59 492ms 16 Jan 2024 731st sisyphus-ppcg 🇦🇺 862 59 598ms 16 Jan 2024 731st SirBogman 🇺🇸 862 59 448ms 20 Jan 2024 731st m-tkach 🇺🇦 862 59 474ms 25 Jan 2024 731st CornerMercury 🇬🇧 862 59 432ms 12 Oct 2025 731st Babafaba 862 59 454ms 15 Oct 2025 731st JOrE20 862 59 378ms 22 Feb 2026 731st Seek64 🇩🇪 862 59 456ms 5 days ago 731st Natanaelel 🇸🇪 862 59 384ms 5 days ago 740th snoozingnewt 🇨🇦 862 116 276ms 19 Oct 2023 740th elgan65536 🇺🇸 862 116 283ms 23 Oct 2023 740th emgordon154 862 116 301ms 17 Jan 2025 740th Matter1024 🇮🇳 862 116 280ms 7 Aug 2025 744th Shanethegamer 🇺🇸 861 57 12ms 19 Nov 2022 744th jared-hughes 861 57 15ms 19 Nov 2022 744th janbehrens 🇩🇪 861 57 13ms 19 Nov 2022 744th Re-Adventures 🇮🇳 861 57 11ms 20 Nov 2022 744th BambooleanLogic 🇸🇪 861 57 13ms 20 Nov 2022 744th GeorgeStechman 🇬🇧 861 57 13ms 20 Nov 2022 744th nstearns96 🇬🇧 861 57 13ms 28 Nov 2022 744th Yewzir 🇧🇪 861 57 12ms 16 Apr 2023 744th quirked-up 861 57 15ms 30 Aug 2023 744th raszpi 🇭🇺 861 57 12ms 2 Sep 2023 744th coreynash 861 57 13ms 25 Sep 2023 744th stefangimmillaro 861 57 11ms 28 Sep 2023 744th trinityy-7 861 57 17ms 18 Oct 2023 744th dylanarmstrong 861 57 13ms 6 Dec 2023 744th jbt 861 57 13ms 26 Dec 2023 744th olleicua 🇺🇸 861 57 13ms 2 Feb 2024 744th alexsave 861 57 11ms 6 Nov 2024 744th dokutan 861 57 16ms 16 Jul 2025 744th snoozingnewt 🇨🇦 861 57 14ms 9 Oct 2025 763rd Sakisan 🇧🇪 861 72 2,800ms 21 Oct 2023 764th KasperKivimaeki 🇫🇮 860 57 31ms 15 Dec 2025 765th MeWhenI 🇻🇦 860 78 112ms 23 Nov 2022 765th Betuaredead 860 78 132ms 7 Jan 2023 765th raszpi 🇭🇺 860 78 117ms 2 Sep 2023 765th dokutan 860 78 119ms 8 Aug 2024 769th KrausRaus 🇺🇸 860 87 369ms 2 Dec 2022 769th TRexOnGit 860 87 364ms 16 Jan 2024 769th amazingalek 🇳🇴 860 87 412ms 21 Jan 2026 772nd bitsandbeyond 🇳🇱 860 92 385ms 5 days ago 773rd MeWhenI 🇻🇦 860 93 61ms 21 Aug 2023 773rd Alex-x90 🇺🇸 860 93 60ms 31 Jan 2024 773rd Mandrzejy 🇵🇱 860 93 60ms 28 Mar 2024 773rd Vinterion 860 93 62ms 27 May 2024 773rd fuzzylojik-golf 🇺🇸 860 93 65ms 6 May 2025 773rd Yax42 🇫🇷 860 93 64ms 4 Oct 2025 779th DialFrost 🇸🇬 859 62 30ms 22 Dec 2023 779th sean-niemann 🇺🇸 859 62 9ms 5 Feb 2025 779th KasperKivimaeki 🇫🇮 859 62 15ms 10 Dec 2025 782nd Yewzir 🇧🇪 859 148 1,905ms 14 Nov 2025 783rd MeWhenI 🇻🇦 859 198 709ms 19 Apr 2025 784th albanian-laundromat 858 114 26ms 2 Oct 2025 784th JOrE20 858 114 27ms 2 Feb 2026 786th Omega65536 🇩🇪 857 86 125ms 22 Nov 2022 786th scpchicken 🇵🇼 857 86 121ms 23 Jan 2023 786th Pale-Vessel 857 86 144ms 8 Jan 2025 786th itljan30 857 86 139ms 26 Jan 2025 786th snoozingnewt 🇨🇦 857 86 132ms 29 Sep 2025 791st madex 🇩🇪 856 70 2ms 22 Nov 2022 791st inventshah 856 70 2ms 25 Nov 2022 791st adaGrad1 856 70 2ms 3 Sep 2023 791st ListeriaM 856 70 2ms 13 Jan 2026 795th fuzzylojik-golf 🇺🇸 856 76 11ms 6 days ago 796th Shanethegamer 🇺🇸 855 89 461ms 19 Nov 2022 796th janbehrens 🇩🇪 855 89 438ms 19 Nov 2022 796th Ripick 855 89 471ms 27 Nov 2024 799th primo-ppcg 🇹🇭 854 54 728ms 20 Nov 2022 800th msbranicky 854 64 15ms 10 Oct 2023 First Prev 721–800 of 2,751 Next Last