The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 13 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 780th sleepyStick 699 74 12ms 7 Dec 2021 780th QuincyNash 🇺🇸 699 74 12ms 14 Jan 2022 780th jmerle 🇳🇱 699 74 12ms 22 Jan 2022 780th Bonjour27891 🇻🇳 699 74 13ms 10 Feb 2022 780th hiichbindermax 699 74 13ms 25 Feb 2022 780th PeterDekkers 699 74 25ms 7 Aug 2022 780th Bananapants22 699 74 12ms 16 Aug 2022 780th CarsonChr 🇺🇸 699 74 12ms 21 Sep 2022 780th suwat513 699 74 12ms 23 Sep 2022 780th ValentinCassayre 699 74 12ms 9 Oct 2022 780th Omega65536 🇩🇪 699 74 12ms 23 Nov 2022 780th neel11235813 699 74 12ms 11 Jan 2023 780th hellwue 699 74 13ms 8 Feb 2023 780th grave367 699 74 24ms 5 Mar 2023 780th crispshaker 699 74 12ms 18 Mar 2023 780th janbehrens 🇩🇪 699 74 13ms 17 Jun 2023 780th msbranicky 699 74 13ms 10 Jul 2023 780th bac0id 699 74 12ms 20 Sep 2023 780th Stockoh 🇫🇷 699 74 13ms 5 Nov 2023 780th smokestacklightnin 🇺🇸 699 74 12ms 29 Dec 2023 780th zwxzwxzwx21 699 74 12ms 11 Jan 2024 780th sultan 699 74 12ms 9 Mar 2024 780th roupiq 🇵🇱 699 74 12ms 18 Apr 2024 780th Herbert00709 🇵🇱 699 74 18ms 8 May 2024 780th christensendaniel 699 74 13ms 13 May 2024 780th vgamula 🇺🇦 699 74 12ms 18 May 2024 780th codingisgreatbutiamnot 699 74 12ms 14 Jul 2024 780th xyangst 699 74 13ms 12 Oct 2024 780th gigaprofisi 🇺🇸 699 74 12ms 2 Mar 2025 780th Pyroan 699 74 12ms 18 Mar 2025 780th BenjaminHGong 699 74 13ms 23 May 2025 780th codewrite 🇬🇧 699 74 12ms 25 May 2025 780th JOrE-Softwares 699 74 13ms 31 May 2025 780th sainiayush 699 74 13ms 14 Jul 2025 780th Emutis 🇱🇹 699 74 12ms 6 Oct 2025 780th luuumine 🇫🇷 699 74 12ms 8 Oct 2025 780th TJK-S 699 74 12ms 28 Oct 2025 780th LostSyntax21 🇬🇧 699 74 12ms 9 Nov 2025 780th Andrey2001 699 74 13ms 15 Dec 2025 780th celiendonze 🇨🇭 699 74 12ms 6 Jan 2026 780th JOrE20 699 74 205ms 19 Feb 2026 780th Aquateraneal 🇺🇸 699 74 12ms 19 Feb 2026 843rd yzhs 🇩🇪 697 33 33ms 7 Sep 2020 844th alexsave 697 69 9ms 3 Jan 2026 845th emgordon154 697 126 115ms 30 Nov 2025 846th Yewzir 🇧🇪 697 151 450ms 14 May 2024 847th retrohun 697 844 31ms 4 Jan 2023 848th janbehrens 🇩🇪 696 130 502ms 21 Nov 2021 849th albanian-laundromat 696 173 56ms 8 Sep 2025 850th vang1ong7ang 695 206 151ms 4 hours ago 851st Irratix 🇳🇱 693 49 82ms 1 Jul 2022 852nd fisxoj 693 72 22ms 28 Apr 2018 853rd dokutan 690 52 1,949ms 31 Dec 2023 853rd FlorianCassayre 🇫🇷 690 52 2,076ms 26 May 2024 855th albanian-laundromat 690 172 1,410ms 18 Oct 2025 856th msrawson 689 75 12ms 30 Aug 2018 856th jmhowl 689 75 12ms 24 Mar 2020 856th Secozzi 689 75 12ms 20 Oct 2020 856th StHagel 689 75 13ms 7 May 2021 856th cubed-guy 689 75 50ms 18 Oct 2021 856th pecholsjones 689 75 12ms 12 Dec 2021 856th BerkeAltiparmak 689 75 12ms 23 May 2022 856th asadullayev 689 75 12ms 8 Jul 2022 856th kenny14231 689 75 13ms 5 Aug 2022 856th jtaxen 689 75 12ms 4 Jan 2023 856th DrPiranoid 689 75 13ms 26 Mar 2023 856th Mikey-Beep 🇬🇧 689 75 23ms 24 Aug 2023 856th rollershutter 689 75 13ms 27 May 2024 856th bropal404 🇮🇳 689 75 12ms 24 Feb 2025 870th lynn 687 236 226ms 4 Aug 2023 871st MeWhenI 🇻🇦 684 237 65ms 6 Jun 2023 872nd grondilu 682 39 228ms 27 Mar 2023 873rd MeWhenI 🇻🇦 680 71 107ms 13 Dec 2023 874th emgordon154 679 213 4,441ms 22 Oct 2024 875th tayloia 🇬🇧 677 71 33ms 17 Jan 2023 875th Yewzir 🇧🇪 677 71 29ms 19 Feb 2024 875th Yax42 🇫🇷 677 71 9ms 5 Sep 2025 875th JOrE20 677 71 26ms 8 Feb 2026 879th KatieLG 🇬🇧 677 74 428ms 15 Jan 2024 879th neel11235813 677 74 415ms 15 Jan 2024 First Prev 801–880 of 2,519 Next Last
