The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 30 hours. Why not try and solve them ahead of time?
Fibonacci 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 705th CatsAreFluffy 960 37 9ms 18 Feb 2023 705th cesarm4 960 37 9ms 30 Apr 2023 705th AlexanderFair 960 37 9ms 29 Jun 2023 705th nyoshe 960 37 11ms 10 Oct 2023 705th Grrisly 960 37 9ms 9 Nov 2023 705th 5cw 🇺🇸 960 37 9ms 13 Jul 2024 705th Zounon 960 37 11ms 18 Sep 2025 705th hellopir2 960 37 10ms 11 Oct 2025 705th Coolbeansyeah 960 37 11ms 18 Feb 2026 730th JayXon 🇺🇸 958 64 135ms 14 Jan 2022 730th kumavale 958 64 126ms 14 Jan 2022 730th frozolotl 958 64 133ms 19 Jan 2022 730th lyphyser 958 64 128ms 21 Jul 2023 730th lynn 958 64 118ms 7 Jul 2024 730th acotis 958 64 126ms 23 Jan 2025 730th DialFrost 🇸🇬 958 64 133ms 4 Apr 2025 730th edsrzf 🇳🇿 958 64 131ms 5 Apr 2025 730th pardouin 🇫🇷 958 64 127ms 17 Apr 2025 730th error256 958 64 140ms 17 Apr 2025 730th emgordon154 958 64 131ms 18 Apr 2025 730th ovs-code 🇩🇪 958 64 155ms 20 Apr 2025 730th plcc0 958 64 130ms 21 Apr 2025 730th sean-niemann 🇺🇸 958 64 127ms 4 Jun 2025 730th Shanethegamer 🇺🇸 958 64 128ms 13 Jun 2025 730th brie-r 958 64 135ms 26 Nov 2025 730th ian-h-chamberlain 🇺🇸 958 64 126ms 18 Dec 2025 730th elgan65536 🇺🇸 958 64 132ms 7 Feb 2026 730th Steffan153 🇫🇮 958 64 151ms 16 Feb 2026 730th cefqrn 958 64 127ms 11 days ago 730th vang1ong7ang 958 64 131ms 11 days ago 751st 0xjac 🇨🇭 954 78 296ms 26 Apr 2020 751st megaturbo 954 78 295ms 11 Jun 2020 751st roflolilolmao 954 78 297ms 11 Jun 2020 751st nwellnhof 🇩🇪 954 78 297ms 12 Jul 2020 751st JayXon 🇺🇸 954 78 304ms 27 Dec 2020 751st Lydxn 🇨🇦 954 78 290ms 14 Sep 2021 751st MeWhenI 🇻🇦 954 78 288ms 9 Feb 2023 751st emplv 🇱🇻 954 78 272ms 28 Mar 2023 751st Steffan153 🇫🇮 954 78 285ms 29 Mar 2023 751st stefangimmillaro 954 78 290ms 20 Jun 2023 751st sean-niemann 🇺🇸 954 78 289ms 27 Jun 2023 751st Yewzir 🇧🇪 954 78 290ms 21 Oct 2023 751st Betuaredead 954 78 292ms 12 Nov 2023 751st sisyphus-ppcg 🇦🇺 954 78 277ms 16 Nov 2023 751st kkoenig 954 78 299ms 29 Dec 2023 751st DialFrost 🇸🇬 954 78 280ms 19 Sep 2024 751st pardouin 🇫🇷 954 78 289ms 29 Sep 2024 751st fuzzylojik-golf 🇺🇸 954 78 291ms 15 Jul 2025 751st KasperKivimaeki 🇫🇮 954 78 313ms 11 Dec 2025 751st albanian-laundromat 954 78 295ms 26 Dec 2025 751st GolfingSuccess 🇬🇷 954 78 284ms 20 Jan 2026 772nd sisyphus-ppcg 🇦🇺 953 28 89ms 14 Dec 2022 772nd Lydxn 🇨🇦 953 28 92ms 15 Dec 2022 772nd DialFrost 🇸🇬 953 28 93ms 5 Jul 2025 772nd ovs-code 🇩🇪 953 28 90ms 11 Dec 2025 776th nwellnhof 🇩🇪 953 46 1ms 9 Feb 2020 776th primo-ppcg 🇹🇭 953 46 2ms 22 Aug 2020 776th JayXon 🇺🇸 953 46 1,465ms 20 Sep 2020 776th HPWiz 🇳🇿 953 46 1,355ms 5 Oct 2020 776th sisyphus-ppcg 🇦🇺 953 46 1,356ms 28 Dec 2020 776th xsot 🇸🇬 953 46 1,386ms 3 Jan 2021 776th m-tkach 🇺🇦 953 46 1ms 15 May 2022 776th sean-niemann 🇺🇸 953 46 1,495ms 7 Jun 2022 776th inventshah 953 46 1ms 12 Jun 2022 776th Irratix 🇳🇱 953 46 2ms 13 Jun 2022 776th saito-ta 🇯🇵 953 46 1ms 21 Jun 2022 776th Alex-x90 🇺🇸 953 46 1ms 17 Oct 2022 776th qwertyuiop3 🇷🇺 953 46 1ms 20 Oct 2022 776th Steffan153 🇫🇮 953 46 1,640ms 27 Oct 2022 776th madex 🇩🇪 953 46 5ms 11 Nov 2022 776th KenanHanke 953 46 2ms 20 Feb 2023 776th Shanethegamer 🇺🇸 953 46 1ms 3 Apr 2023 776th Yewzir 🇧🇪 953 46 1ms 22 Apr 2023 776th klixel 🇨🇦 953 46 1ms 11 May 2023 776th ovs-code 🇩🇪 953 46 1,350ms 8 Oct 2023 776th 09cf 953 46 2ms 8 Oct 2023 776th KasperKivimaeki 🇫🇮 953 46 1,450ms 15 Oct 2023 776th JohandeRuiter 🇳🇱 953 46 1ms 15 Oct 2023 776th ZakkkkAttackkkk 🇵🇭 953 46 1ms 5 Nov 2023 776th roupiq 🇵🇱 953 46 1ms 23 Nov 2023 First Prev 721–800 of 9,851 Next Last