The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 8 days. Why not try and solve them ahead of time?
Abundant 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 233rd brimstonetrader 928 62 198ms 15 Apr 2025 233rd dokutan 928 62 195ms 17 Jul 2025 233rd YAJUE114514 928 62 194ms 27 Jul 2025 233rd DanielVenable 928 62 200ms 2 Aug 2025 233rd JOrE20 928 62 211ms 25 days ago 246th Shanethegamer 🇺🇸 927 44 1,299ms 19 Nov 2022 246th MeWhenI 🇻🇦 927 44 1,219ms 12 May 2023 246th error256 927 44 1,255ms 29 Jul 2024 249th nwellnhof 🇩🇪 926 66 2ms 8 Mar 2023 250th primo-ppcg 🇹🇭 926 80 128ms 20 Nov 2022 250th stefangimmillaro 926 80 133ms 1 Oct 2023 250th ovs-code 🇩🇪 926 80 130ms 22 Oct 2023 250th stackofbears 926 80 128ms 22 Oct 2024 250th MeWhenI 🇻🇦 926 80 130ms 27 Oct 2024 255th targrik 925 58 14ms 27 Jun 2025 256th Lydxn 🇨🇦 925 73 115ms 21 Jan 2023 257th Shanethegamer 🇺🇸 924 61 28ms 19 Apr 2023 257th Steffan153 🇫🇮 924 61 27ms 19 Apr 2023 257th AlephSquirrel 924 61 28ms 20 Apr 2023 257th primo-ppcg 🇹🇭 924 61 86ms 30 Apr 2023 257th Lydxn 🇨🇦 924 61 28ms 9 May 2023 257th MeWhenI 🇻🇦 924 61 27ms 23 May 2023 257th Andriamanitra 🇫🇮 924 61 28ms 13 Jul 2023 257th GrayJoKing 🇦🇺 924 61 28ms 20 Aug 2023 257th btnlq 924 61 29ms 21 Oct 2023 257th dokutan 924 61 28ms 14 Jul 2024 257th edsrzf 🇳🇿 924 61 27ms 2 Nov 2024 257th emgordon154 924 61 27ms 28 Dec 2024 257th sean-niemann 🇺🇸 924 61 28ms 21 Apr 2025 257th kg583 🇺🇸 924 61 27ms 25 Sep 2025 257th DialFrost 🇸🇬 924 61 29ms 24 Jan 2026 272nd wh3n3v3r 🇨🇿 922 27 10ms 19 Nov 2024 273rd JayXon 🇺🇸 922 67 159ms 19 Nov 2022 273rd Lydxn 🇨🇦 922 67 153ms 20 Nov 2022 273rd Steffan153 🇫🇮 922 67 147ms 8 days ago 276th jared-hughes 922 71 9ms 19 Nov 2022 276th Steffan153 🇫🇮 922 71 9ms 20 Nov 2022 276th Waffle3z 922 71 9ms 11 Dec 2022 276th sean-niemann 🇺🇸 922 71 9ms 6 Mar 2025 280th GrayJoKing 🇦🇺 921 67 130ms 19 Nov 2022 280th JayXon 🇺🇸 921 67 135ms 19 Nov 2022 280th primo-ppcg 🇹🇭 921 67 132ms 20 Nov 2022 280th Lydxn 🇨🇦 921 67 130ms 20 Nov 2022 280th MeWhenI 🇻🇦 921 67 137ms 22 Nov 2022 280th stefangimmillaro 921 67 132ms 4 Dec 2022 280th prplz 🇦🇺 921 67 123ms 8 Jan 2023 280th Steffan153 🇫🇮 921 67 147ms 13 Jan 2023 280th sean-niemann 🇺🇸 921 67 150ms 1 Jan 2025 280th kaascevich 921 67 135ms 8 Jul 2025 280th snoozingnewt 🇨🇦 921 67 136ms 30 Dec 2025 280th DialFrost 🇸🇬 921 67 135ms 23 Jan 2026 292nd Lydxn 🇨🇦 921 109 291ms 22 Jan 2023 293rd stefangimmillaro 920 60 2,508ms 24 Oct 2024 293rd MeWhenI 🇻🇦 920 60 2,775ms 27 Oct 2024 293rd JayXon 🇺🇸 920 60 2,542ms 7 Nov 2024 293rd JayXon 🇺🇸 920 60 15ms 19 Nov 2025 293rd madex 🇩🇪 920 60 2,574ms 8 days ago 293rd Steffan153 🇫🇮 920 60 2,662ms 8 days ago 299th GrayJoKing 🇦🇺 917 29 37ms 12 Jul 2025 300th Lydxn 🇨🇦 917 54 194ms 21 Feb 2023 301st clockworknazo 917 59 224ms 20 Nov 2022 301st Lydxn 🇨🇦 917 59 219ms 29 Jan 2023 301st ovs-code 🇩🇪 917 59 219ms 3 Feb 2023 301st GrayJoKing 🇦🇺 917 59 219ms 12 Oct 2023 301st Steffan153 🇫🇮 917 59 222ms 6 days ago 306th marshallward 🇺🇸 917 62 43ms 19 Nov 2022 306th primo-ppcg 🇹🇭 917 62 41ms 20 Nov 2022 306th Lydxn 🇨🇦 917 62 42ms 20 Nov 2022 306th snoozingnewt 🇨🇦 917 62 44ms 19 days ago 310th ovs-code 🇩🇪 917 63 244ms 12 Sep 2024 311th Shanethegamer 🇺🇸 917 65 51ms 19 Nov 2022 311th GolfingSuccess 🇬🇷 917 65 50ms 19 Nov 2022 311th bricknellj 917 65 50ms 19 Nov 2022 311th hallvabo 🇳🇴 917 65 66ms 19 Nov 2022 311th inventshah 917 65 50ms 20 Nov 2022 311th annaproxy 917 65 50ms 20 Nov 2022 311th neihousaigaai 917 65 51ms 22 Nov 2022 311th Fishron 917 65 50ms 29 Nov 2022 311th nstearns96 🇬🇧 917 65 49ms 1 Dec 2022 311th kg583 🇺🇸 917 65 51ms 23 Jan 2023 First Prev 241–320 of 2,757 Next Last