The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 5 days. Why not try and solve them ahead of time?
Fibonacci 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 718th PawaritL 960 37 10ms 28 Jan 2019 718th PFischbeck 960 37 9ms 2 Aug 2019 718th hoodadam 960 37 9ms 25 Oct 2019 718th CyberTapir 960 37 9ms 29 Jul 2020 718th McAidan99 960 37 10ms 29 Jul 2020 718th obamaman360 960 37 9ms 29 Jul 2020 718th PhonicCanine 960 37 9ms 1 Aug 2020 718th BBoehm 🇩🇪 960 37 10ms 8 Dec 2020 718th neihousaigaai 960 37 10ms 8 May 2021 718th jacklynnepenick 960 37 9ms 13 Aug 2021 718th jrm5399 🇰🇿 960 37 9ms 31 Jan 2022 718th mathisfun271 960 37 9ms 5 Mar 2022 718th Nicronmil 960 37 9ms 22 Nov 2022 718th CatsAreFluffy 960 37 9ms 18 Feb 2023 718th cesarm4 960 37 9ms 30 Apr 2023 718th AlexanderFair 960 37 9ms 29 Jun 2023 718th nyoshe 960 37 11ms 10 Oct 2023 718th Grrisly 960 37 9ms 9 Nov 2023 718th 5cw 🇺🇸 960 37 9ms 13 Jul 2024 718th Zounon 960 37 11ms 18 Sep 2025 718th hellopir2 960 37 10ms 11 Oct 2025 718th Coolbeansyeah 960 37 11ms 18 Feb 2026 743rd JayXon 🇺🇸 958 64 126ms 14 Jan 2022 743rd kumavale 958 64 118ms 14 Jan 2022 743rd frozolotl 958 64 129ms 19 Jan 2022 743rd lyphyser 958 64 121ms 21 Jul 2023 743rd lynn 958 64 117ms 7 Jul 2024 743rd acotis 958 64 126ms 23 Jan 2025 743rd DialFrost 🇸🇬 958 64 129ms 4 Apr 2025 743rd edsrzf 🇳🇿 958 64 126ms 5 Apr 2025 743rd pardouin 🇫🇷 958 64 130ms 17 Apr 2025 743rd error256 958 64 131ms 17 Apr 2025 743rd emgordon154 958 64 122ms 18 Apr 2025 743rd ovs-code 🇩🇪 958 64 126ms 20 Apr 2025 743rd plcc0 958 64 124ms 21 Apr 2025 743rd sean-niemann 🇺🇸 958 64 127ms 4 Jun 2025 743rd Shanethegamer 🇺🇸 958 64 127ms 13 Jun 2025 743rd brie-r 958 64 126ms 26 Nov 2025 743rd ian-h-chamberlain 🇺🇸 958 64 125ms 18 Dec 2025 743rd elgan65536 🇺🇸 958 64 122ms 7 Feb 2026 743rd Steffan153 🇫🇮 958 64 125ms 16 Feb 2026 743rd cefqrn 958 64 127ms 7 days ago 743rd vang1ong7ang 958 64 133ms 7 days ago 764th sisyphus-ppcg 🇦🇺 953 28 89ms 14 Dec 2022 764th Lydxn 🇨🇦 953 28 92ms 15 Dec 2022 764th DialFrost 🇸🇬 953 28 93ms 5 Jul 2025 764th ovs-code 🇩🇪 953 28 90ms 11 Dec 2025 768th prplz 🇦🇺 953 47 2ms 9 Mar 2019 768th filharmonista 953 47 1ms 13 Mar 2020 768th Attero 🇸🇪 953 47 1ms 14 May 2020 768th nwellnhof 🇩🇪 953 47 1ms 4 Oct 2020 768th primo-ppcg 🇹🇭 953 47 1ms 5 Oct 2020 768th alexdreptate 953 47 2ms 9 Oct 2020 768th paulcirstean-yonder 🇷🇴 953 47 1ms 10 Oct 2020 768th urojony 🇵🇱 953 47 1ms 28 Dec 2020 768th GrayJoKing 🇦🇺 953 47 1ms 9 Jan 2021 768th mihaits 953 47 2ms 29 Jan 2021 768th NewDefectus 🇮🇱 953 47 2ms 1 Feb 2021 768th MatheusAvellar 🇧🇷 953 47 1ms 7 May 2021 768th inventshah 953 47 1ms 8 May 2021 768th pandapawskat 953 47 1ms 1 Sep 2021 768th Irratix 🇳🇱 953 47 1ms 1 Sep 2021 768th lynn 953 47 2ms 2 Oct 2021 768th vang1ong7ang 953 47 1ms 26 Oct 2021 768th janbehrens 🇩🇪 953 47 1ms 26 Oct 2021 768th m-tkach 🇺🇦 953 47 1ms 2 Dec 2021 768th SirBogman 🇺🇸 953 47 1ms 14 Dec 2021 768th btnlq 953 47 1ms 5 Jan 2022 768th jared-hughes 953 47 1ms 4 Mar 2022 768th shellbertt 🇨🇦 953 47 1ms 7 Apr 2022 768th saito-ta 🇯🇵 953 47 1ms 21 Jun 2022 768th Shanethegamer 🇺🇸 953 47 1ms 11 Jul 2022 768th AlephSquirrel 953 47 1ms 16 Jul 2022 768th ZakkkkAttackkkk 🇵🇭 953 47 1ms 26 Jul 2022 768th FlorianCassayre 🇫🇷 953 47 1ms 8 Oct 2022 768th ValentinCassayre 953 47 1ms 8 Oct 2022 768th Alex-x90 🇺🇸 953 47 2ms 17 Oct 2022 768th MeWhenI 🇻🇦 953 47 2ms 17 Oct 2022 768th stefangimmillaro 953 47 2ms 17 Oct 2022 768th qwertyuiop3 🇷🇺 953 47 1ms 20 Oct 2022 First Prev 721–800 of 9,887 Next Last