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?
Evil Numbers 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 48th 4atj 982 40 9ms 30 Jun 2025 48th bzijlema 🇳🇱 982 40 9ms 3 Jul 2025 48th ndren 982 40 9ms 9 Jul 2025 48th SanderRuud 982 40 9ms 12 Jul 2025 48th wuduculfre 982 40 10ms 21 Jul 2025 48th edsrzf 🇳🇿 982 40 10ms 22 Jul 2025 48th qpwoeirut 982 40 9ms 23 Aug 2025 48th Apataras 982 40 9ms 27 Aug 2025 48th HETHAT 🇩🇿 982 40 10ms 16 Sep 2025 48th InigoK 🇺🇸 982 40 10ms 17 Sep 2025 48th CornerMercury 🇬🇧 982 40 9ms 25 Sep 2025 48th BrunoVisnadi 🇧🇷 982 40 9ms 28 Sep 2025 48th luuumine 🇫🇷 982 40 9ms 10 Oct 2025 48th Babafaba 982 40 10ms 14 Oct 2025 48th iczelia 🇩🇪 982 40 8ms 25 Oct 2025 48th snoozingnewt 🇨🇦 982 40 9ms 25 Oct 2025 48th blaztoma 🇱🇹 982 40 10ms 15 Nov 2025 48th sunleonid 982 40 10ms 22 Nov 2025 48th CommandLeo 🇮🇹 982 40 10ms 28 Nov 2025 48th ryyyn 🇺🇸 982 40 10ms 3 Dec 2025 48th AdrienHache 🇫🇷 982 40 9ms 19 Dec 2025 48th Flekay 🇩🇪 982 40 9ms 12 Feb 2026 48th dokutan 982 40 9ms 14 Feb 2026 48th FoxInTheClouds 982 40 9ms 17 Feb 2026 48th roelderickx 982 40 10ms 10 days ago 48th aksyristos 982 40 9ms 6 hours ago 187th JayXon 🇺🇸 972 37 10ms 17 Feb 2021 187th Lydxn 🇨🇦 972 37 10ms 9 Mar 2022 187th lukegustafson 🇺🇸 972 37 11ms 6 Jun 2024 187th Steffan153 🇫🇮 972 37 10ms 2 Aug 2024 187th sean-niemann 🇺🇸 972 37 9ms 3 Aug 2024 187th rucin93 🇵🇱 972 37 10ms 3 Aug 2024 193rd kritixilithos 971 18 33ms 12 Aug 2018 193rd miles-cg 971 18 33ms 23 Aug 2018 193rd primo-ppcg 🇹🇭 971 18 33ms 5 Sep 2018 193rd HPWiz 🇳🇿 971 18 35ms 13 Sep 2018 193rd prplz 🇦🇺 971 18 32ms 3 Jan 2020 193rd nwellnhof 🇩🇪 971 18 32ms 6 May 2020 193rd jonahx 971 18 32ms 15 May 2020 193rd StellaCG 971 18 33ms 10 Jul 2020 193rd rak1507 🇬🇧 971 18 33ms 13 Sep 2021 193rd lynn 971 18 33ms 13 Nov 2021 193rd Bubbler-4 971 18 35ms 17 Nov 2021 193rd NewDefectus 🇮🇱 971 18 33ms 5 Dec 2021 193rd Lydxn 🇨🇦 971 18 33ms 10 Jan 2022 193rd SirBogman 🇺🇸 971 18 32ms 19 Jan 2022 193rd GrayJoKing 🇦🇺 971 18 33ms 3 Feb 2022 193rd ovs-code 🇩🇪 971 18 32ms 6 May 2022 193rd Steffan153 🇫🇮 971 18 32ms 11 Jan 2023 193rd sean-niemann 🇺🇸 971 18 33ms 26 Jan 2023 193rd DialFrost 🇸🇬 971 18 32ms 26 Jan 2023 193rd 4hg 🇺🇸 971 18 35ms 19 Apr 2023 193rd pardouin 🇫🇷 971 18 32ms 24 Sep 2024 193rd Natanaelel 🇸🇪 971 18 32ms 8 Nov 2024 193rd JayXon 🇺🇸 971 18 32ms 8 Mar 2025 193rd 2bular 971 18 32ms 25 Aug 2025 193rd fuzzylojik-golf 🇺🇸 971 18 31ms 27 Aug 2025 193rd snoozingnewt 🇨🇦 971 18 34ms 3 Dec 2025 219th GrayJoKing 🇦🇺 970 16 2ms 20 Mar 2025 220th Lydxn 🇨🇦 967 27 35ms 4 Feb 2022 220th radarek 🇵🇱 967 27 33ms 25 Mar 2022 220th pardouin 🇫🇷 967 27 35ms 2 Sep 2025 223rd Lydxn 🇨🇦 961 25 255ms 5 Jan 2024 224th Lydxn 🇨🇦 961 49 1ms 11 Dec 2025 225th nwellnhof 🇩🇪 958 24 115ms 6 Dec 2021 225th Lydxn 🇨🇦 958 24 117ms 1 May 2022 225th GrayJoKing 🇦🇺 958 24 116ms 16 Dec 2022 228th gregadoff 958 41 10ms 25 Jan 2018 228th sstadick 958 41 10ms 25 Jan 2018 228th biotinker 958 41 11ms 25 Jan 2018 228th Constructor7 958 41 9ms 19 Mar 2018 228th TheYMI 958 41 10ms 20 Mar 2018 228th mueller14003 958 41 10ms 7 Apr 2018 228th pedrotpa 958 41 10ms 20 May 2018 228th GeoffroyF 958 41 10ms 25 May 2018 228th 0jdxt 958 41 10ms 12 Nov 2018 228th matheusnervis 958 41 10ms 15 Jan 2019 228th Gymhgy 958 41 10ms 20 Apr 2019 228th Sakaala 958 41 10ms 22 Apr 2019 228th daedals 958 41 10ms 14 May 2019 First Prev 161–240 of 5,157 Next Last
