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 Bash 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 81st FlorianCassayre 🇫🇷 556 54 5ms 27 Jan 2023 81st Maximizer02 556 54 2ms 19 Jul 2025 83rd Zindu 545 55 2ms 16 Nov 2018 83rd niKK3 545 55 3ms 16 Nov 2018 83rd sech1p 🇵🇱 545 55 2ms 2 Jul 2021 83rd eiburns 545 55 1ms 19 Jan 2023 83rd muser-logiccpu 🇺🇦 545 55 1ms 21 Aug 2025 83rd jacekwladzinski 545 55 2ms 2 Oct 2025 83rd vhoulbreque 🇫🇷 545 55 2ms 28 Nov 2025 90th yzhs 🇩🇪 536 56 2ms 1 Feb 2020 90th geofft 536 56 1ms 11 Dec 2020 90th ze-h 🇺🇸 536 56 2ms 10 Jan 2022 90th Mikey-Beep 🇬🇧 536 56 1ms 20 Aug 2025 90th madeforlosers 536 56 2ms 9 days ago 95th Sluip 526 57 2ms 12 Jan 2020 95th JRaspass 🇬🇧 526 57 1ms 6 Mar 2020 97th Mandrzejy 🇵🇱 517 58 1ms 10 Apr 2024 97th Jacob385 517 58 2ms 15 Apr 2025 97th Pyroan 517 58 2ms 17 Dec 2025 100th biinari 508 59 2ms 18 Mar 2018 100th vladcioaba 508 59 1ms 8 Nov 2018 100th martinnorling 🇸🇪 508 59 1ms 7 Feb 2022 100th inverseLorentz 🇦🇺 508 59 2ms 21 Feb 2024 100th PyryL 🇫🇮 508 59 2ms 23 Aug 2024 100th JunkIce 508 59 2ms 9 Jul 2025 100th HumanoidCPU 508 59 2ms 16 Aug 2025 107th lvenier 500 60 1ms 2 Jan 2018 107th dzove855 500 60 2ms 2 Jan 2018 107th mtrazzi 500 60 1ms 22 Oct 2020 107th DrPiranoid 500 60 2ms 22 Sep 2022 111th eagleduck 492 61 226ms 27 Feb 2018 111th ObserverOfTime 492 61 2ms 18 Nov 2018 111th ytaki0801 🇯🇵 492 61 2ms 19 Jun 2021 111th Robbe7730 492 61 2ms 17 Nov 2021 111th jhpaques 🇫🇷 492 61 2ms 30 Jul 2022 111th zakariamouhid 492 61 2ms 10 Jan 2023 111th jtaxen 492 61 2ms 21 Jun 2023 111th stellartux 492 61 2ms 24 Dec 2023 111th msbranicky 492 61 2ms 3 Jul 2024 111th Just4FunCoder 492 61 2ms 26 Aug 2024 111th desecaw13 492 61 2ms 24 Jan 2025 111th heanyang1 492 61 2ms 22 Apr 2025 111th solisolu 492 61 2ms 29 Nov 2025 124th madeve-unipi 484 62 2ms 17 Oct 2019 124th vonKrafft 484 62 2ms 25 Mar 2020 124th abailey2020 🇺🇸 484 62 2ms 3 Oct 2020 124th trist224 🇫🇷 484 62 2ms 9 Nov 2022 124th phpboyscout 484 62 2ms 27 Apr 2023 124th ashtraypettingzoo 🇺🇸 484 62 2ms 19 Mar 2024 124th azure-blondon 484 62 2ms 10 Jul 2024 124th SwordF-Official 🇺🇸 484 62 3ms 3 Jun 2025 132nd jhunterkohler 476 63 2ms 19 May 2021 133rd raphaelimahorn 469 64 1ms 3 Aug 2021 133rd fkantelberg 469 64 2ms 15 Jul 2023 133rd Jonson26 469 64 2ms 23 Feb 2026 136th nico-bachner 462 65 2ms 5 Dec 2020 136th CedricGebistorf 462 65 2ms 1 Feb 2022 138th lukasmoellerch 455 66 2ms 5 Oct 2019 138th seanleken 455 66 2ms 20 Dec 2019 138th lilyyy411 455 66 2ms 10 Sep 2021 138th Xzyaihni 455 66 2ms 11 Nov 2022 138th cingulataluke 455 66 2ms 2 Jun 2024 138th hacker112 🇸🇪 455 66 2ms 12 Jun 2024 144th MichaelMBradley 🇨🇦 448 67 2ms 19 Jul 2022 144th Zach1031 448 67 2ms 21 Nov 2025 146th DaCuteRaccoon 441 68 1ms 2 Apr 2022 147th owen-c-parker 🇺🇸 435 69 2ms 23 Nov 2021 147th CheeseCake628 🇳🇴 435 69 2ms 11 Oct 2023 149th natinaum 429 70 2ms 3 May 2019 149th MisterrLuck 429 70 2ms 11 Sep 2023 149th Stockoh 🇫🇷 429 70 2ms 15 Jun 2024 152nd aaronze 🇦🇺 423 71 2ms 29 Apr 2021 153rd destofr 417 72 2ms 23 Aug 2022 153rd Pyro569 417 72 2ms 30 Jul 2023 155th oceko 411 73 2ms 26 Nov 2022 156th jayanwar 385 78 2ms 20 Dec 2019 156th sh4711 🇩🇪 385 78 2ms 2 May 2021 156th sm1lko 385 78 2ms 14 Dec 2022 159th dillon-duncando 380 79 2ms 21 Dec 2021 160th DrProfPatPending 366 82 2ms 25 Jun 2019 First Prev 81–160 of 175 Next Last