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?
Abundant 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 712th edsrzf 🇳🇿 888 113 300ms 23 Feb 2026 722nd nwellnhof 🇩🇪 887 30 36ms 20 Nov 2022 723rd sisyphus-ppcg 🇦🇺 887 44 37ms 20 Nov 2022 724th emgordon154 887 46 1,204ms 12 Nov 2024 725th Shanethegamer 🇺🇸 887 74 1,289ms 1 Mar 2023 725th MeWhenI 🇻🇦 887 74 1,343ms 8 Jun 2023 725th DialFrost 🇸🇬 887 74 1,279ms 10 Mar 2025 728th DialFrost 🇸🇬 887 89 121ms 15 Apr 2025 728th Shanethegamer 🇺🇸 887 89 116ms 15 Apr 2025 728th GolfingSuccess 🇬🇷 887 89 109ms 28 Nov 2025 728th emgordon154 887 89 113ms 28 Nov 2025 728th snoozingnewt 🇨🇦 887 89 114ms 30 Nov 2025 728th edsrzf 🇳🇿 887 89 113ms 30 Nov 2025 728th Steffan153 🇫🇮 887 89 113ms 24 days ago 735th Shanethegamer 🇺🇸 886 37 322ms 19 Nov 2022 735th SirBogman 🇺🇸 886 37 344ms 20 Nov 2022 735th Natanaelel 🇸🇪 886 37 314ms 19 May 2023 735th prplz 🇦🇺 886 37 311ms 6 Feb 2024 739th m-tkach 🇺🇦 886 69 3ms 19 Nov 2022 740th kg583 🇺🇸 886 91 104ms 2 days ago 740th Steffan153 🇫🇮 886 91 108ms 2 days ago 740th GolfingSuccess 🇬🇷 886 91 107ms 46 hours ago 740th Yewzir 🇧🇪 886 91 110ms 2 hours ago 744th Yewzir 🇧🇪 885 63 437ms 4 Feb 2024 744th dokutan 885 63 418ms 13 Aug 2024 744th Babafaba 885 63 562ms 22 Oct 2025 747th postie77 885 86 384ms 26 Jul 2023 747th billings7 🇬🇧 885 86 353ms 19 May 2024 747th Illuminum2 885 86 370ms 22 May 2025 747th snoozingnewt 🇨🇦 885 86 388ms 9 Oct 2025 751st DialFrost 🇸🇬 884 56 58ms 14 Dec 2025 752nd Shanethegamer 🇺🇸 884 73 246ms 19 Nov 2022 752nd Yewzir 🇧🇪 884 73 142ms 27 Mar 2024 752nd sean-niemann 🇺🇸 884 73 141ms 8 Oct 2024 752nd DialFrost 🇸🇬 884 73 137ms 25 Dec 2025 756th JayXon 🇺🇸 884 111 27ms 8 Oct 2023 757th canissimia 🇦🇶 884 293 8ms 21 Oct 2023 758th m-tkach 🇺🇦 883 101 231ms 20 Apr 2023 759th janAkali 🇷🇺 882 70 125ms 16 days ago 760th GrayJoKing 🇦🇺 882 91 624ms 19 Nov 2022 760th fuzzylojik-golf 🇺🇸 882 91 371ms 24 Sep 2025 760th dokutan 882 91 382ms 24 Sep 2025 760th sean-niemann 🇺🇸 882 91 380ms 24 Sep 2025 760th Shanethegamer 🇺🇸 882 91 469ms 25 Sep 2025 760th nwellnhof 🇩🇪 882 91 495ms 25 Sep 2025 760th Yewzir 🇧🇪 882 91 373ms 2 Oct 2025 760th namelessiw 882 91 410ms 4 Oct 2025 760th Yax42 🇫🇷 882 91 512ms 4 Oct 2025 760th stefangimmillaro 882 91 437ms 6 Oct 2025 760th snoozingnewt 🇨🇦 882 91 380ms 9 Oct 2025 760th CaedenHarper 🇨🇦 882 91 397ms 19 Oct 2025 760th MeWhenI 🇻🇦 882 91 382ms 7 Nov 2025 760th emgordon154 882 91 377ms 9 Feb 2026 760th Steffan153 🇫🇮 882 91 389ms 11 Feb 2026 760th raphaelimahorn 882 91 463ms 11 days ago 760th edsrzf 🇳🇿 882 91 392ms 21 hours ago 777th two-bad 🇬🇧 881 56 14ms 15 Feb 2024 777th helbling 🇨🇭 881 56 11ms 29 Feb 2024 777th Vinterion 881 56 12ms 27 May 2024 777th pardouin 🇫🇷 881 56 14ms 15 Sep 2024 777th targrik 881 56 13ms 13 Feb 2025 777th Yax42 🇫🇷 881 56 15ms 15 Sep 2025 777th denis-jasselette 881 56 11ms 17 Oct 2025 784th Kaffeleif 881 76 53ms 15 Dec 2023 785th JayXon 🇺🇸 881 146 1,719ms 14 Sep 2025 785th emgordon154 881 146 1,641ms 10 Jan 2026 787th emgordon154 880 56 142ms 8 Aug 2024 787th sean-niemann 🇺🇸 880 56 130ms 25 Oct 2024 787th rucin93 🇵🇱 880 56 134ms 25 Oct 2024 787th Steffan153 🇫🇮 880 56 165ms 11 Feb 2026 791st kimbo 🇺🇸 880 114 290ms 9 Jan 2023 791st Yewzir 🇧🇪 880 114 300ms 25 Oct 2023 791st fuzzylojik-golf 🇺🇸 880 114 275ms 28 Aug 2025 791st KasperKivimaeki 🇫🇮 880 114 288ms 4 Oct 2025 795th lifthrasiir 🇰🇷 880 147 321ms 19 Dec 2024 796th SirBogman 🇺🇸 879 47 55ms 20 Nov 2022 796th Natanaelel 🇸🇪 879 47 55ms 24 Nov 2022 796th olivermrose 🇺🇸 879 47 53ms 5 Dec 2022 796th anter69 🇭🇺 879 47 53ms 31 Jan 2023 796th olleicua 🇺🇸 879 47 54ms 2 Feb 2024 First Prev 721–800 of 2,757 Next Last