The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 5 hours. 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 560th ovs-code 🇩🇪 946 35 35ms 21 Jun 2022 560th Steffan153 🇫🇮 946 35 38ms 18 days ago 563rd primo-ppcg 🇹🇭 946 44 123ms 25 Apr 2020 563rd prplz 🇦🇺 946 44 121ms 16 May 2020 563rd Lydxn 🇨🇦 946 44 125ms 12 Jan 2021 563rd JayXon 🇺🇸 946 44 124ms 16 Feb 2021 563rd sisyphus-ppcg 🇦🇺 946 44 123ms 30 May 2021 563rd ovs-code 🇩🇪 946 44 123ms 19 Nov 2021 563rd GrayJoKing 🇦🇺 946 44 122ms 15 Dec 2021 563rd MichalMarsalek 🇨🇿 946 44 128ms 16 Feb 2022 563rd lynn 946 44 124ms 3 Jun 2022 563rd MeWhenI 🇻🇦 946 44 125ms 10 Oct 2022 563rd clockworknazo 946 44 124ms 26 Nov 2022 563rd Steffan153 🇫🇮 946 44 125ms 30 Nov 2022 563rd sean-niemann 🇺🇸 946 44 125ms 17 Jan 2023 563rd DialFrost 🇸🇬 946 44 119ms 18 Jan 2023 563rd steffan-polygolf 946 44 127ms 19 Feb 2023 563rd Shanethegamer 🇺🇸 946 44 126ms 8 Mar 2023 563rd stefangimmillaro 946 44 123ms 11 Jun 2023 563rd Yewzir 🇧🇪 946 44 126ms 23 Sep 2023 563rd Betuaredead 946 44 120ms 13 Nov 2023 563rd pardouin 🇫🇷 946 44 120ms 21 Sep 2024 563rd fuzzylojik-golf 🇺🇸 946 44 122ms 7 Aug 2025 563rd dokutan 946 44 120ms 26 Feb 2026 585th michael-pruglo 🇺🇦 946 50 1ms 13 Jul 2022 585th qwertyuiop3 🇷🇺 946 50 2ms 14 May 2025 587th JRaspass 🇬🇧 945 28 104ms 3 May 2018 587th labster 945 28 117ms 28 May 2018 587th phdphil 945 28 125ms 29 May 2018 587th AlexDaniel 🇪🇪 945 28 146ms 11 Oct 2018 587th metakuna 945 28 141ms 16 Apr 2019 587th retrohun 945 28 123ms 27 Apr 2019 587th SirBogman 🇺🇸 945 28 126ms 8 Feb 2020 587th jjatria 945 28 121ms 11 Jul 2020 587th Shanethegamer 🇺🇸 945 28 121ms 20 Mar 2021 587th lynn 945 28 134ms 13 Apr 2021 587th MeWhenI 🇻🇦 945 28 134ms 31 Jan 2023 587th DialFrost 🇸🇬 945 28 129ms 6 Feb 2023 587th SirFireball3521 945 28 138ms 8 Mar 2023 587th Yewzir 🇧🇪 945 28 134ms 17 Nov 2023 587th pardouin 🇫🇷 945 28 146ms 22 Aug 2024 587th fuzzylojik-golf 🇺🇸 945 28 104ms 21 Aug 2025 603rd primo-ppcg 🇹🇭 945 45 92ms 12 Oct 2020 603rd prplz 🇦🇺 945 45 93ms 13 Oct 2020 603rd Lydxn 🇨🇦 945 45 91ms 12 Jan 2021 603rd JayXon 🇺🇸 945 45 96ms 11 Feb 2021 603rd sisyphus-ppcg 🇦🇺 945 45 82ms 30 May 2021 603rd cure-honey 🇯🇵 945 45 91ms 29 Jun 2021 603rd ovs-code 🇩🇪 945 45 91ms 19 Nov 2021 603rd GrayJoKing 🇦🇺 945 45 94ms 14 Mar 2022 603rd lynn 945 45 92ms 3 Jun 2022 603rd stefangimmillaro 945 45 93ms 30 Sep 2022 603rd MeWhenI 🇻🇦 945 45 98ms 10 Oct 2022 603rd clockworknazo 945 45 89ms 13 Oct 2022 603rd Steffan153 🇫🇮 945 45 83ms 24 Nov 2022 603rd sean-niemann 🇺🇸 945 45 88ms 17 Jan 2023 603rd DialFrost 🇸🇬 945 45 89ms 6 Feb 2023 603rd steffan-polygolf 945 45 95ms 19 Feb 2023 603rd Shanethegamer 🇺🇸 945 45 89ms 8 Mar 2023 603rd Yewzir 🇧🇪 945 45 88ms 13 Oct 2023 603rd Betuaredead 945 45 85ms 11 Nov 2023 603rd pardouin 🇫🇷 945 45 96ms 22 Aug 2024 603rd fuzzylojik-golf 🇺🇸 945 45 81ms 12 Jul 2025 603rd edsrzf 🇳🇿 945 45 88ms 26 Jul 2025 603rd albanian-laundromat 945 45 95ms 24 Sep 2025 603rd snoozingnewt 🇨🇦 945 45 100ms 4 Dec 2025 603rd dokutan 945 45 89ms 26 Feb 2026 628th Lydxn 🇨🇦 945 68 53ms 1 Jan 2022 628th prplz 🇦🇺 945 68 60ms 1 Jan 2022 628th JayXon 🇺🇸 945 68 61ms 5 Jan 2022 628th sisyphus-ppcg 🇦🇺 945 68 55ms 23 Mar 2022 628th nwellnhof 🇩🇪 945 68 53ms 8 Aug 2022 628th Steffan153 🇫🇮 945 68 61ms 17 Nov 2022 628th inventshah 945 68 56ms 26 Jan 2023 628th sean-niemann 🇺🇸 945 68 56ms 11 Apr 2023 628th Alex-x90 🇺🇸 945 68 55ms 17 Jul 2023 628th xsot 🇸🇬 945 68 57ms 22 May 2024 628th KasperKivimaeki 🇫🇮 945 68 57ms 15 Feb 2025 628th pardouin 🇫🇷 945 68 63ms 31 May 2025 628th fuzzylojik-golf 🇺🇸 945 68 60ms 14 Jul 2025 First Prev 561–640 of 4,253 Next Last