The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 7 days. Why not try and solve them ahead of time?
Evil Numbers in brainfuck 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 1st canissimia 🇦🇶 1,000 131 1ms 10 Jul 2021 2nd KasperKivimaeki 🇫🇮 985 133 1ms 19 Feb 2026 3rd GrayJoKing 🇦🇺 885 148 1ms 3 Apr 2021 4th angel-p57 🇯🇵 753 174 1ms 16 Nov 2023 5th primo-ppcg 🇹🇭 652 201 1ms 19 Apr 2019 6th prplz 🇦🇺 642 204 1ms 15 Apr 2019 7th SnapDragon64 604 217 1ms 4 Feb 2021 8th orthoplex 🇨🇽 593 221 1ms 17 Jun 2020 9th bricknellj 577 227 1ms 22 Nov 2022 9th dokutan 577 227 1ms 22 Oct 2023 11th stefangimmillaro 565 232 1ms 13 Oct 2021 12th snoozingnewt 🇨🇦 560 234 1ms 23 Nov 2025 12th JOrE20 560 234 1ms 28 Nov 2025 14th elgan65536 🇺🇸 557 235 1ms 3 Mar 2024 15th rak1507 🇬🇧 555 236 1ms 31 Dec 2020 15th anter69 🇭🇺 555 236 1ms 30 Jan 2023 15th HumanoidCPU 555 236 1ms 3 May 2024 15th CaedenHarper 🇨🇦 555 236 1ms 23 Jan 2025 19th Salutations45 553 237 1ms 23 Nov 2024 20th MichalMarsalek 🇨🇿 550 238 1ms 5 Jun 2022 21st tomtheisen 🇺🇸 546 240 1ms 27 Oct 2021 22nd abailey2020 🇺🇸 544 241 1ms 16 Apr 2020 22nd Just4FunCoder 544 241 1ms 24 Mar 2023 24th jmerle 🇳🇱 539 243 1ms 13 Feb 2023 25th olleicua 🇺🇸 533 246 1ms 15 Jul 2025 26th Waffle3z 520 252 1ms 18 Oct 2020 26th Stockoh 🇫🇷 520 252 1ms 26 Apr 2024 28th msbranicky 514 255 1ms 7 Aug 2023 29th MeWhenI 🇻🇦 506 259 1ms 8 Aug 2021 29th mokymok 🇺🇸 506 259 1ms 18 Oct 2021 31st fuzzylojik-golf 🇺🇸 500 262 2ms 3 hours ago 32nd dymowski 498 263 1ms 29 Jul 2019 32nd retrohun 498 263 1ms 1 Jan 2023 34th thisishowmymindworks 🇳🇴 482 272 1ms 25 Jul 2020 35th AkashTandon167 478 274 1ms 15 Nov 2020 35th galloj 🇨🇿 478 274 1ms 10 Jan 2021 35th sisyphus-ppcg 🇦🇺 478 274 1ms 15 Mar 2022 38th Legiatron 471 278 1ms 28 Apr 2023 38th madeforlosers 471 278 1ms 8 Nov 2024 40th cafehaine 🇫🇷 449 292 1ms 7 Apr 2019 41st vonKrafft 399 328 1ms 25 Mar 2020 42nd KatieLG-Transpiler 🇬🇧 338 388 1ms 24 Jun 2022 42nd KatieLG 🇬🇧 338 388 1ms 29 Oct 2022 44th Mathrew2012 260 504 1ms 14 Aug 2024 45th Jacob385 239 549 1ms 26 Mar 2024 46th rambox11 187 700 1ms 17 Dec 2019 46th Bejofo 187 700 1ms 19 Feb 2021 46th Schmitt-Very-Cool 187 700 1ms 31 Jul 2023 49th voytxt 🇨🇿 136 966 1ms 9 Feb 2022 50th aaronze 🇦🇺 133 988 1ms 30 Apr 2021 51st mrmena 🇦🇺 72 1,817 1ms 13 Jun 2021 52nd xkacer 🇨🇿 60 2,179 1ms 22 Nov 2020 52nd Mabeloid 🇳🇴 60 2,179 1ms 17 Sep 2024 54th Jonatan6 🇩🇰 49 2,700 1ms 29 Aug 2021 1–54 of 54
