The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 3 days. Why not try and solve them ahead of time?
Niven Numbers (Long) 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 796th HETHAT 🇩🇿 889 55 17ms 18 Aug 2022 796th Fishron 889 55 17ms 29 Sep 2022 796th jakobkordez 🇸🇮 889 55 17ms 15 Nov 2022 796th CheeseCake628 🇳🇴 889 55 17ms 19 Mar 2023 796th 4ndyJ 🇬🇧 889 55 17ms 20 Mar 2023 796th InigoK 🇺🇸 889 55 17ms 25 Apr 2023 796th 2011-Chan-Ethan 889 55 18ms 12 Jul 2023 796th Andriamanitra 🇫🇮 889 55 17ms 20 Jul 2023 796th namelessiw 889 55 18ms 5 Mar 2024 796th jtaxen 889 55 18ms 26 Mar 2024 796th rollershutter 889 55 17ms 4 Jul 2024 796th 5quiwyrm 889 55 17ms 10 Dec 2024 796th souta-1326 889 55 17ms 25 Mar 2025 796th wobblybits 889 55 17ms 23 Aug 2025 796th 77Tigers 889 55 16ms 13 Jan 2026 816th janbehrens 🇩🇪 888 44 348ms 8 Aug 2022 816th MeWhenI 🇻🇦 888 44 369ms 25 Nov 2022 818th GrayJoKing 🇦🇺 888 99 24ms 14 Aug 2022 818th primo-ppcg 🇹🇭 888 99 25ms 4 Sep 2022 818th m-tkach 🇺🇦 888 99 25ms 2 Jun 2023 821st DialFrost 🇸🇬 887 90 108ms 14 Apr 2025 821st edsrzf 🇳🇿 887 90 114ms 30 Nov 2025 821st snoozingnewt 🇨🇦 887 90 117ms 1 Dec 2025 821st pardouin 🇫🇷 887 90 131ms 4 Dec 2025 821st Steffan153 🇫🇮 887 90 115ms 27 Feb 2026 826th MeWhenI 🇻🇦 886 73 98ms 22 Mar 2024 827th GolfingSuccess 🇬🇷 885 26 3ms 9 Feb 2023 827th Natanaelel 🇸🇪 885 26 3ms 18 Nov 2023 827th akamayu-ouo 🇹🇼 885 26 3ms 30 Jul 2024 827th 4hg 🇺🇸 885 26 3ms 9 Sep 2024 827th CornerMercury 🇬🇧 885 26 3ms 8 Dec 2025 827th emgordon154 885 26 3ms 22 Feb 2026 833rd JRaspass 🇬🇧 885 30 136ms 8 Aug 2022 833rd Shanethegamer 🇺🇸 885 30 120ms 8 Aug 2022 833rd yokasuretsu 885 30 161ms 6 Jan 2025 836th dokutan 885 36 1,309ms 30 Apr 2024 837th DialFrost 🇸🇬 883 87 64ms 11 Apr 2025 838th AlephSquirrel 883 88 96ms 31 Jan 2025 839th sisyphus-ppcg 🇦🇺 880 69 117ms 14 Oct 2022 839th Steffan153 🇫🇮 880 69 119ms 17 Nov 2022 839th sean-niemann 🇺🇸 880 69 117ms 11 Apr 2023 839th m-tkach 🇺🇦 880 69 123ms 2 Jun 2023 839th stefangimmillaro 880 69 111ms 14 Jun 2023 839th Yewzir 🇧🇪 880 69 120ms 10 Apr 2024 839th pardouin 🇫🇷 880 69 114ms 21 Oct 2024 839th DialFrost 🇸🇬 880 69 128ms 11 Apr 2025 839th fuzzylojik-golf 🇺🇸 880 69 104ms 28 Aug 2025 848th primo-ppcg 🇹🇭 880 94 17ms 4 Sep 2022 848th Steffan153 🇫🇮 880 94 15ms 28 Jul 2024 848th pardouin 🇫🇷 880 94 15ms 21 Oct 2024 851st canissimia 🇦🇶 880 218 7ms 21 Aug 2022 852nd ovs-code 🇩🇪 879 54 143ms 4 Aug 2024 852nd GrayJoKing 🇦🇺 879 54 157ms 13 Aug 2024 852nd rucin93 🇵🇱 879 54 151ms 13 Aug 2024 852nd emplv 🇱🇻 879 54 136ms 30 Oct 2024 856th DialFrost 🇸🇬 879 63 3ms 11 Apr 2025 856th MeWhenI 🇻🇦 879 63 3ms 25 Dec 2025 858th pardouin 🇫🇷 879 100 25ms 21 Oct 2024 859th DialFrost 🇸🇬 879 124 1,477ms 11 Apr 2025 859th Steffan153 🇫🇮 879 124 1,448ms 24 days ago 861st JayXon 🇺🇸 879 137 1,696ms 14 Jan 2026 861st DialFrost 🇸🇬 879 137 1,646ms 17 Jan 2026 861st Steffan153 🇫🇮 879 137 1,730ms 27 Feb 2026 864th albanian-laundromat 878 64 145ms 15 Nov 2025 865th DialFrost 🇸🇬 877 46 1,800ms 21 Jan 2025 866th BambooleanLogic 🇸🇪 877 55 13ms 22 Aug 2022 866th Mazn3k 877 55 37ms 14 Feb 2023 866th jbt 877 55 14ms 28 Dec 2023 866th xyangst 877 55 14ms 7 Oct 2024 866th tomh1012 877 55 15ms 3 Dec 2025 871st JDiLenarda 🇫🇷 877 67 1,314ms 7 Dec 2023 872nd SirBogman 🇺🇸 876 53 391ms 16 Jan 2024 872nd namelessiw 876 53 421ms 5 Mar 2024 872nd commandz0 🇺🇸 876 53 384ms 1 Sep 2025 875th KasperKivimaeki 🇫🇮 876 107 287ms 3 Oct 2025 876th pschmid0 🇺🇸 875 54 7ms 8 Aug 2022 876th oddvalue 875 54 7ms 24 Aug 2022 876th Stopi 875 54 7ms 1 Sep 2022 876th janbehrens 🇩🇪 875 54 7ms 27 Nov 2022 876th DialFrost 🇸🇬 875 54 7ms 6 Feb 2023 First Prev 801–880 of 2,559 Next Last