The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 4 days. Why not try and solve them ahead of time?
𝑒 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 801st albanian-laundromat 701 56 1,107ms 12 Sep 2025 802nd mueller14003 701 67 16ms 7 Apr 2018 802nd clfs 701 67 16ms 10 Jul 2018 802nd bkshrader 701 67 17ms 30 Dec 2018 802nd elldur 701 67 11ms 17 Mar 2019 802nd giacomogallina 701 67 16ms 6 Jun 2019 802nd dzhang314 701 67 17ms 14 Aug 2019 802nd sk- 701 67 16ms 11 Sep 2019 802nd amishtal 701 67 17ms 26 Nov 2019 802nd AforAmpere 701 67 17ms 19 Jan 2020 802nd Jviscus1 701 67 18ms 24 Apr 2020 802nd GalladeGuy 🇺🇸 701 67 17ms 23 May 2020 802nd hashkitten 701 67 16ms 24 Sep 2020 802nd KatieLG 🇬🇧 701 67 16ms 1 Nov 2020 802nd Dazza314 🇬🇧 701 67 17ms 6 Nov 2020 802nd argusdusty 🇺🇸 701 67 17ms 26 Dec 2020 802nd ydevor 🇮🇱 701 67 17ms 22 Feb 2021 802nd asadullayev 701 67 18ms 3 Mar 2021 802nd vezzick 701 67 12ms 8 Mar 2021 802nd starxingchenc 701 67 16ms 31 May 2021 802nd RYNO8 701 67 16ms 8 Aug 2021 802nd ngocbd 🇻🇳 701 67 16ms 31 Aug 2021 802nd ToE42 701 67 17ms 7 Sep 2021 802nd walterfeyman 701 67 17ms 30 Oct 2021 802nd Bonjour27891 🇻🇳 701 67 17ms 7 Feb 2022 802nd LeeCamp 701 67 17ms 15 Feb 2022 802nd alexamici 701 67 17ms 5 Apr 2022 802nd cooljoseph1 701 67 17ms 6 May 2022 802nd ImpressedByRocks 701 67 16ms 24 Jun 2022 802nd Bananapants22 701 67 17ms 16 Aug 2022 802nd suwat513 701 67 15ms 2 Sep 2022 802nd CarsonChr 🇺🇸 701 67 17ms 20 Sep 2022 802nd za3k 701 67 12ms 28 Oct 2022 802nd Omega65536 🇩🇪 701 67 16ms 23 Nov 2022 802nd scpchicken 🇵🇼 701 67 16ms 31 Dec 2022 802nd SucukMitEi 701 67 16ms 7 Jan 2023 802nd klixel 🇨🇦 701 67 16ms 21 May 2023 802nd trinityy-7 701 67 17ms 13 Jun 2023 802nd msbranicky 701 67 16ms 10 Jul 2023 802nd cingulataluke 701 67 17ms 26 Aug 2023 802nd Stockoh 🇫🇷 701 67 17ms 5 Nov 2023 802nd keelimeguy 🇺🇸 701 67 17ms 6 Nov 2023 802nd smokestacklightnin 🇺🇸 701 67 16ms 29 Dec 2023 802nd Dataen 701 67 17ms 12 Jan 2024 802nd zwxzwxzwx21 701 67 18ms 7 Feb 2024 802nd jfallon1997 701 67 17ms 25 Apr 2024 802nd stertooy 🇧🇪 701 67 17ms 11 Jun 2024 802nd HumanoidCPU 701 67 10ms 14 Aug 2024 802nd jatloe 701 67 17ms 23 Aug 2024 802nd JonahEMorgan 701 67 17ms 9 Nov 2024 802nd desecaw13 701 67 17ms 24 Jan 2025 802nd gigaprofisi 🇺🇸 701 67 16ms 2 Mar 2025 802nd 0dyse 701 67 17ms 23 Apr 2025 802nd codewrite 🇬🇧 701 67 17ms 25 May 2025 802nd sainiayush 701 67 17ms 14 Jul 2025 802nd LuisGoncalves05 🇵🇹 701 67 17ms 27 Jul 2025 802nd cthierfelder 🇲🇨 701 67 17ms 7 Aug 2025 802nd jacekwladzinski 701 67 18ms 6 Oct 2025 802nd nulzo 701 67 18ms 17 Oct 2025 802nd Andrey2001 701 67 17ms 15 Dec 2025 802nd NoneTheFewer 701 67 17ms 26 Dec 2025 802nd JesseNoEyes 🇺🇸 701 67 17ms 20 Jan 2026 802nd Aquateraneal 🇺🇸 701 67 17ms 19 Feb 2026 802nd ASampsonMu31 701 67 10ms 14 days ago 865th KasperKivimaeki 🇫🇮 701 180 290ms 11 Dec 2025 866th retrohun 701 849 28ms 4 Jan 2023 867th albanian-laundromat 700 64 462ms 9 Aug 2025 868th m-tkach 🇺🇦 699 54 41ms 12 Dec 2022 869th cywong-amino 🇭🇰 699 69 11ms 30 May 2020 869th doge1338 699 69 57ms 22 Mar 2021 869th coreynash 699 69 13ms 21 Mar 2024 872nd MeWhenI 🇻🇦 695 88 1,153ms 25 Aug 2024 873rd SirBogman 🇺🇸 693 45 174ms 29 Jan 2024 874th cure-honey 🇯🇵 693 152 130ms 5 Jul 2021 875th lifthrasiir 🇰🇷 692 56 293ms 17 Dec 2024 876th 4hg 🇺🇸 691 55 86ms 16 Sep 2023 877th msrawson 691 68 16ms 30 Aug 2018 877th skps2010 691 68 17ms 1 Jan 2019 877th rschwa6308 🇺🇸 691 68 16ms 30 Mar 2019 877th daedals 691 68 18ms 5 Jun 2019 First Prev 801–880 of 3,473 Next Last
