The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 26 hours. Why not try and solve them ahead of time?
φ 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 717th bkshrader 728 71 24ms 30 Dec 2018 717th GolfingSuccess 🇬🇷 728 71 24ms 27 May 2019 717th michelebastione 🇮🇹 728 71 23ms 30 Jun 2019 717th thisishowmymindworks 🇳🇴 728 71 10ms 17 Oct 2020 717th LlamaLad7 🇬🇧 728 71 24ms 17 Jan 2021 717th georgehulme 728 71 24ms 27 Jan 2022 717th LeeCamp 728 71 23ms 15 Feb 2022 717th andre-de-lorde 728 71 25ms 7 Jun 2022 717th cbondurant 728 71 12ms 6 Jul 2022 717th Bulmenisaurus 728 71 24ms 19 Jun 2024 731st HPWiz 🇳🇿 728 73 111ms 20 Nov 2023 732nd pardouin 🇫🇷 728 163 2,237ms 28 Mar 2025 733rd DialFrost 🇸🇬 727 52 64ms 19 Jan 2026 734th Shanethegamer 🇺🇸 726 69 423ms 16 Jan 2024 734th dokutan 726 69 354ms 14 Feb 2026 736th GolfingSuccess 🇬🇷 725 812 641ms 10 Aug 2022 737th MeWhenI 🇻🇦 723 69 11ms 2 May 2022 738th Irratix 🇳🇱 723 79 125ms 25 Sep 2021 739th annaproxy 722 47 92ms 27 Aug 2022 740th SirFireball3521 719 37 475ms 14 Mar 2023 741st jdidion 718 72 25ms 20 Feb 2018 741st ay2718 718 72 564ms 19 Oct 2019 741st OllieBoyne 🇬🇧 718 72 25ms 19 Jan 2021 741st lmolteno 718 72 24ms 5 Mar 2021 741st Wodinthemighty 718 72 24ms 4 May 2021 741st jacklynnepenick 718 72 10ms 26 Aug 2021 741st dillon-duncando 718 72 25ms 6 Dec 2021 741st quimey 718 72 13ms 24 Mar 2023 741st anonymaew 718 72 29ms 2 Aug 2023 741st ei14 718 72 10ms 7 May 2024 741st luftj 718 72 24ms 11 Dec 2024 752nd m-tkach 🇺🇦 715 227 82ms 17 Dec 2023 753rd CatsAreFluffy 714 80 117ms 7 Dec 2022 754th LS2021 713 127 484ms 24 Nov 2023 755th Herbert00709 🇵🇱 711 148 64ms 9 Apr 2024 756th trinityy-7 710 41 8ms 16 Feb 2024 757th MeWhenI 🇻🇦 709 188 629ms 4 Mar 2025 758th PyPylia 🇦🇺 708 73 23ms 24 May 2021 758th tetraxile 708 73 24ms 3 Oct 2021 758th jfallon1997 708 73 25ms 3 Jan 2023 758th RandGuy 708 73 23ms 25 Jan 2024 762nd yokasuretsu 707 48 70ms 17 Apr 2018 762nd BrenSchaap 707 48 174ms 13 Nov 2021 762nd emgordon154 707 48 36ms 21 Dec 2021 762nd SirBogman 🇺🇸 707 48 87ms 11 Jan 2023 762nd jared-hughes 707 48 178ms 20 Jan 2023 762nd Mukundan314 707 48 38ms 17 Apr 2025 768th 52525rr 707 68 10ms 12 Jun 2025 769th GolfingSuccess 🇬🇷 705 71 439ms 15 Jan 2024 770th GrayJoKing 🇦🇺 705 322 98ms 6 Dec 2020 771st DialFrost 🇸🇬 704 171 67ms 27 Mar 2025 772nd msbranicky 703 51 165ms 12 Jan 2024 772nd Emutis 🇱🇹 703 51 178ms 14 Oct 2025 774th emgordon154 702 71 2,399ms 28 Oct 2024 774th inventshah 702 71 2,441ms 28 Oct 2024 774th DialFrost 🇸🇬 702 71 2,840ms 26 Dec 2024 774th jkelly467 702 71 2,617ms 7 Jan 2026 778th rucin93 🇵🇱 701 136 196ms 14 Nov 2025 779th emgordon154 700 69 7ms 10 Dec 2024 780th mueller14003 699 74 12ms 7 Apr 2018 780th ly0va 699 74 13ms 3 Jan 2019 780th skps2010 699 74 12ms 12 Jan 2019 780th markus-rekdal 699 74 24ms 31 May 2019 780th hoodadam 699 74 14ms 19 Jul 2019 780th dzhang314 699 74 13ms 14 Aug 2019 780th marcin7Cd 699 74 11ms 4 Sep 2019 780th sk- 699 74 12ms 11 Sep 2019 780th Haksell 🇦🇶 699 74 12ms 1 Dec 2019 780th yzhs 🇩🇪 699 74 12ms 19 Jan 2020 780th Jviscus1 699 74 12ms 24 Apr 2020 780th itiievskyi 🇺🇦 699 74 13ms 6 Aug 2020 780th Maltysen 699 74 11ms 26 Sep 2020 780th KatieLG 🇬🇧 699 74 12ms 6 Nov 2020 780th ydevor 🇮🇱 699 74 12ms 22 Feb 2021 780th stordev 699 74 12ms 26 Feb 2021 780th Indivicivet 699 74 13ms 18 Mar 2021 780th neihousaigaai 699 74 12ms 28 Mar 2021 780th enbyte 699 74 13ms 4 Jun 2021 780th walterfeyman 699 74 12ms 30 Oct 2021 780th ehulinsky 🇺🇸 699 74 13ms 10 Nov 2021 First Prev 721–800 of 2,518 Next Last
