The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 8 days. Why not try and solve them ahead of time?
Niven 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 50th kg583 🇺🇸 984 44 9ms 26 Jul 2025 50th GolfingSuccess 🇬🇷 984 44 10ms 10 Aug 2025 50th CornerMercury 🇬🇧 984 44 9ms 24 Sep 2025 50th j-zhang43 984 44 9ms 16 Nov 2025 50th sunleonid 984 44 10ms 25 Nov 2025 50th Babafaba 984 44 10ms 26 Nov 2025 50th ndren 984 44 9ms 1 Dec 2025 50th ryyyn 🇺🇸 984 44 11ms 16 Jan 2026 50th albanian-laundromat 984 44 10ms 22 Jan 2026 50th Flekay 🇩🇪 984 44 10ms 26 days ago 50th dokutan 984 44 9ms 24 days ago 50th snoozingnewt 🇨🇦 984 44 10ms 24 days ago 50th MeWhenI 🇻🇦 984 44 9ms 3 days ago 50th blaztoma 🇱🇹 984 44 10ms 2 days ago 50th Emutis 🇱🇹 984 44 10ms 106 mins ago 96th primo-ppcg 🇹🇭 980 25 2ms 22 Jun 2021 96th HPWiz 🇳🇿 980 25 2ms 7 Feb 2022 96th GrayJoKing 🇦🇺 980 25 2ms 7 Feb 2022 96th ovs-code 🇩🇪 980 25 2ms 27 Nov 2022 96th Lydxn 🇨🇦 980 25 2ms 4 Aug 2023 96th MeWhenI 🇻🇦 980 25 2ms 17 Feb 2025 102nd thospel 980 27 94ms 3 May 2018 102nd nwellnhof 🇩🇪 980 27 94ms 4 Oct 2020 102nd primo-ppcg 🇹🇭 980 27 88ms 5 Oct 2020 102nd prplz 🇦🇺 980 27 95ms 2 Nov 2020 102nd GrayJoKing 🇦🇺 980 27 105ms 3 Dec 2020 102nd Indivicivet 980 27 96ms 24 Mar 2021 102nd Lydxn 🇨🇦 980 27 94ms 7 Mar 2022 102nd scpchicken 🇵🇼 980 27 92ms 8 Mar 2022 102nd HPWiz 🇳🇿 980 27 97ms 16 Dec 2022 102nd sisyphus-ppcg 🇦🇺 980 27 102ms 16 Dec 2022 102nd Steffan153 🇫🇮 980 27 102ms 17 Dec 2022 102nd Natanaelel 🇸🇪 980 27 93ms 19 Feb 2023 102nd ovs-code 🇩🇪 980 27 95ms 30 Dec 2023 102nd sean-niemann 🇺🇸 980 27 90ms 5 Apr 2025 116th JayXon 🇺🇸 979 28 246ms 29 Oct 2023 116th Lydxn 🇨🇦 979 28 260ms 29 Oct 2023 116th sisyphus-ppcg 🇦🇺 979 28 220ms 29 Oct 2023 116th Shanethegamer 🇺🇸 979 28 246ms 29 Oct 2023 116th Steffan153 🇫🇮 979 28 232ms 29 Oct 2023 116th prplz 🇦🇺 979 28 257ms 29 Oct 2023 116th sean-niemann 🇺🇸 979 28 267ms 25 Mar 2025 123rd ETHproductions 🇺🇸 977 42 9ms 4 May 2018 123rd rambox11 977 42 9ms 9 May 2018 123rd kritixilithos 977 42 8ms 3 Jun 2018 123rd Nuottajarvi 977 42 9ms 10 Aug 2018 123rd lazarow 977 42 9ms 22 Oct 2018 123rd prplz 🇦🇺 977 42 8ms 20 Nov 2018 123rd primo-ppcg 🇹🇭 977 42 8ms 28 Nov 2018 123rd dee-gomma 977 42 8ms 27 Mar 2019 123rd user189032 977 42 9ms 29 May 2019 123rd vgroen 977 42 9ms 16 Jul 2019 123rd AussieWarren 977 42 10ms 31 Aug 2019 123rd Mikaeel66 977 42 9ms 13 Nov 2019 123rd emplv 🇱🇻 977 42 8ms 23 Nov 2019 123rd xsot 🇸🇬 977 42 8ms 28 Nov 2019 123rd arestivo 977 42 9ms 27 Apr 2020 123rd ondras 977 42 8ms 30 Apr 2020 123rd shuding 977 42 9ms 5 May 2020 123rd cywong-amino 🇭🇰 977 42 9ms 20 May 2020 123rd Attero 🇸🇪 977 42 10ms 22 May 2020 123rd efgen 977 42 9ms 8 Jun 2020 123rd Irratix 🇳🇱 977 42 9ms 21 Jul 2020 123rd thisishowmymindworks 🇳🇴 977 42 9ms 26 Jul 2020 123rd ToriTheChicken 977 42 8ms 26 Jul 2020 123rd rucin93 🇵🇱 977 42 9ms 12 Sep 2020 123rd Argeento 🇵🇱 977 42 9ms 12 Sep 2020 123rd NewDefectus 🇮🇱 977 42 9ms 23 Sep 2020 123rd tomtheisen 🇺🇸 977 42 9ms 24 Sep 2020 123rd JayXon 🇺🇸 977 42 8ms 9 Oct 2020 123rd o0lit3 🇺🇸 977 42 8ms 22 Oct 2020 123rd nwellnhof 🇩🇪 977 42 9ms 5 Nov 2020 123rd HPWiz 🇳🇿 977 42 9ms 12 Nov 2020 123rd BBoehm 🇩🇪 977 42 11ms 20 Nov 2020 123rd GrayJoKing 🇦🇺 977 42 8ms 27 Nov 2020 123rd tscherter 977 42 9ms 5 Dec 2020 123rd LoLoLucky 977 42 9ms 7 Dec 2020 123rd janbehrens 🇩🇪 977 42 9ms 8 Feb 2021 123rd janlelis 977 42 9ms 10 Feb 2021 123rd sisyphus-ppcg 🇦🇺 977 42 10ms 19 Feb 2021 First Prev 81–160 of 4,246 Next Last
