The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 115 mins. Why not try and solve them ahead of time?
Pernicious 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 874th sean-niemann 🇺🇸 917 49 37ms 21 Apr 2023 874th prplz 🇦🇺 917 49 34ms 22 May 2023 874th Yewzir 🇧🇪 917 49 35ms 12 Oct 2023 874th Betuaredead 917 49 34ms 11 Nov 2023 874th pardouin 🇫🇷 917 49 36ms 5 Oct 2024 874th fuzzylojik-golf 🇺🇸 917 49 37ms 6 Sep 2025 874th CaedenHarper 🇨🇦 917 49 38ms 27 Oct 2025 874th snoozingnewt 🇨🇦 917 49 37ms 26 days ago 889th Steffan153 🇫🇮 917 52 109ms 7 Aug 2024 890th SirBogman 🇺🇸 916 39 424ms 15 Jan 2024 890th AlephSquirrel 916 39 424ms 16 Jan 2024 890th namelessiw 916 39 359ms 23 Jan 2024 890th dokutan 916 39 412ms 26 Mar 2024 890th alemelis 916 39 422ms 4 Oct 2024 890th CornerMercury 🇬🇧 916 39 434ms 12 Oct 2025 890th snoozingnewt 🇨🇦 916 39 378ms 20 Oct 2025 890th BREMAUCY 🇫🇷 916 39 381ms 6 Dec 2025 898th UnderKoen 🇳🇱 916 58 1ms 6 Jul 2022 898th sisyphus-ppcg 🇦🇺 916 58 1ms 7 Jul 2022 898th m-tkach 🇺🇦 916 58 1ms 8 Mar 2023 898th orthoplex 🇨🇽 916 58 1ms 29 Jun 2023 898th Lydxn 🇨🇦 916 58 2ms 19 Jul 2023 903rd Steffan153 🇫🇮 915 49 7ms 16 Feb 2026 904th kkoenig 915 50 1ms 4 Jan 2024 904th namelessiw 915 50 1ms 11 Mar 2024 904th dokutan 915 50 1ms 27 Apr 2024 904th FlyingPenguin223 915 50 1ms 18 Dec 2024 904th Yax42 🇫🇷 915 50 2ms 3 Oct 2025 904th Babafaba 915 50 1ms 18 Oct 2025 904th ApoChagi 915 50 1ms 19 Oct 2025 911th Natanaelel 🇸🇪 914 36 9ms 25 Jun 2022 911th scpchicken 🇵🇼 914 36 9ms 25 Feb 2023 911th Yax42 🇫🇷 914 36 9ms 5 Sep 2025 914th Steffan153 🇫🇮 914 40 3ms 12 Aug 2024 914th btnlq 914 40 3ms 18 Aug 2024 914th sean-niemann 🇺🇸 914 40 4ms 11 Oct 2024 917th marshallward 🇺🇸 914 49 39ms 20 Nov 2022 918th Lydxn 🇨🇦 914 60 465ms 27 Feb 2022 918th JayXon 🇺🇸 914 60 436ms 27 Feb 2022 918th GrayJoKing 🇦🇺 914 60 467ms 28 Feb 2022 918th lynn 914 60 474ms 3 Jun 2022 918th sean-niemann 🇺🇸 914 60 473ms 4 Nov 2022 918th MeWhenI 🇻🇦 914 60 464ms 5 Nov 2022 918th Steffan153 🇫🇮 914 60 460ms 1 Jan 2023 918th DialFrost 🇸🇬 914 60 424ms 13 Jan 2023 918th Shanethegamer 🇺🇸 914 60 479ms 6 Feb 2023 918th sisyphus-ppcg 🇦🇺 914 60 475ms 23 Mar 2023 918th prplz 🇦🇺 914 60 475ms 22 May 2023 918th ovs-code 🇩🇪 914 60 459ms 17 Jul 2023 918th Yewzir 🇧🇪 914 60 459ms 11 Oct 2023 918th Betuaredead 914 60 431ms 11 Nov 2023 918th pardouin 🇫🇷 914 60 459ms 18 Aug 2024 918th fuzzylojik-golf 🇺🇸 914 60 463ms 18 Jul 2025 918th edsrzf 🇳🇿 914 60 475ms 4 Sep 2025 918th snoozingnewt 🇨🇦 914 60 458ms 20 Oct 2025 918th emgordon154 914 60 466ms 8 Feb 2026 918th GolfingSuccess 🇬🇷 914 60 405ms 18 days ago 938th Lydxn 🇨🇦 914 68 24ms 16 Apr 2022 938th JayXon 🇺🇸 914 68 24ms 17 Apr 2022 938th prplz 🇦🇺 914 68 24ms 17 Apr 2022 938th primo-ppcg 🇹🇭 914 68 24ms 25 Jun 2022 938th m-tkach 🇺🇦 914 68 25ms 26 Jun 2022 938th emplv 🇱🇻 914 68 25ms 22 Nov 2022 938th Steffan153 🇫🇮 914 68 24ms 24 Jan 2023 938th DialFrost 🇸🇬 914 68 25ms 5 Feb 2023 938th GrayJoKing 🇦🇺 914 68 26ms 19 Mar 2023 938th Shanethegamer 🇺🇸 914 68 25ms 19 Mar 2023 938th sean-niemann 🇺🇸 914 68 25ms 13 Apr 2023 938th Betuaredead 914 68 23ms 13 Nov 2023 938th Yewzir 🇧🇪 914 68 25ms 14 Nov 2023 938th pardouin 🇫🇷 914 68 23ms 19 Aug 2024 938th edsrzf 🇳🇿 914 68 26ms 22 Jul 2025 938th fuzzylojik-golf 🇺🇸 914 68 25ms 20 Aug 2025 938th snoozingnewt 🇨🇦 914 68 24ms 6 Dec 2025 938th GolfingSuccess 🇬🇷 914 68 26ms 17 days ago 956th prplz 🇦🇺 913 39 83ms 10 Feb 2021 956th GrayJoKing 🇦🇺 913 39 86ms 11 Feb 2021 956th sisyphus-ppcg 🇦🇺 913 39 76ms 30 May 2021 956th lynn 913 39 83ms 11 Sep 2021 956th inventshah 913 39 83ms 18 Jun 2022 First Prev 881–960 of 3,463 Next Last