The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 6 days. Why not try and solve them ahead of time?
Abundant Numbers in all languages in chars. 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 Chars Time Submitted 881st Irratix 🇳🇱 787 93 58ms 3 Jan 2022 881st prplz 🇦🇺 787 93 62ms 4 Jan 2022 881st Mandrzejy 🇵🇱 787 93 65ms 28 Mar 2024 881st tailorspy 787 93 62ms 22 May 2024 885th Irratix 🇳🇱 785 70 1ms 13 Jun 2022 886th emplv 🇱🇻 784 73 129ms 24 Oct 2023 887th MarcMush 🇫🇷 783 44 382ms 15 Jun 2022 888th o0lit3 🇺🇸 781 45 3ms 23 Jun 2021 889th GrayJoKing 🇦🇺 781 77 1,353ms 17 Nov 2021 890th mdsn 780 29 3ms 17 Sep 2023 890th fcjr 780 29 2ms 31 Aug 2025 892nd detrumi 🇳🇱 780 85 129ms 4 Jan 2020 892nd scpchicken 🇵🇼 780 85 121ms 16 May 2022 892nd nullie 780 85 119ms 11 Nov 2023 892nd orifu 780 85 138ms 14 Oct 2024 892nd itljan30 780 85 134ms 26 Jan 2025 892nd snoozingnewt 🇨🇦 780 85 131ms 29 Sep 2025 898th MeWhenI 🇻🇦 779 48 78ms 13 Dec 2022 899th cryosis7 778 60 11ms 23 Nov 2020 899th BBoehm 🇩🇪 778 60 15ms 8 Jan 2021 899th mrxz 🇳🇱 778 60 9ms 8 May 2021 899th mobibluman 778 60 10ms 3 Sep 2021 899th TheCod-r 🇦🇶 778 60 10ms 3 Mar 2022 899th maxpelic 🇺🇸 778 60 10ms 6 Jul 2022 899th CatsAreFluffy 778 60 12ms 18 Feb 2023 899th veehz 778 60 9ms 21 Feb 2023 899th vlad-ushakov 778 60 9ms 23 Mar 2023 899th noftaly 778 60 9ms 9 Oct 2023 899th madeforlosers 778 60 13ms 10 Oct 2023 899th cyrilboyer 🇫🇷 778 60 10ms 21 Dec 2023 899th junkondo-jp 778 60 11ms 22 Sep 2024 899th eTrey13 778 60 10ms 3 Feb 2025 899th a6166231 🇨🇳 778 60 11ms 20 May 2025 899th c-py 778 60 10ms 1 Nov 2025 915th Betuaredead 778 63 2ms 7 Jan 2023 915th alphafalfa 778 63 2ms 25 Oct 2024 915th dokutan 778 63 2ms 28 Apr 2025 915th snoozingnewt 🇨🇦 778 63 2ms 9 Oct 2025 915th albanian-laundromat 778 63 2ms 21 Dec 2025 920th Re-Adventures 🇮🇳 778 94 68ms 2 Jan 2022 920th m-tkach 🇺🇦 778 94 441ms 28 Apr 2022 920th Yewzir 🇧🇪 778 94 57ms 3 Feb 2023 920th HHHMGK 778 94 63ms 2 Oct 2025 920th emgordon154 778 94 63ms 8 Feb 2026 925th Yewzir 🇧🇪 777 58 392ms 15 Jan 2024 925th SirBogman 🇺🇸 777 58 432ms 20 Jan 2024 925th duckyluuk 🇳🇱 777 58 420ms 28 Aug 2024 925th CornerMercury 🇬🇧 777 58 418ms 12 Oct 2025 929th P-Quentin 🇫🇷 777 62 10ms 5 Aug 2022 929th jsthope 777 62 11ms 28 Sep 2022 929th ASampsonMu31 777 62 10ms 13 days ago 932nd CLOStrophobic 🇮🇹 777 81 26ms 28 Jan 2025 933rd kmathis22 777 93 473ms 23 Oct 2025 933rd ethanlally 777 93 459ms 12 Nov 2025 935th JayXon 🇺🇸 777 203 10ms 2 Aug 2023 935th Steffan153 🇫🇮 777 203 10ms 2 Aug 2023 935th janbehrens 🇩🇪 777 203 10ms 2 Aug 2023 935th BREMAUCY 🇫🇷 777 203 9ms 7 Sep 2023 935th lynn 777 203 10ms 17 Oct 2023 935th dokutan 777 203 9ms 26 Oct 2023 935th Yewzir 🇧🇪 777 203 10ms 12 Mar 2024 935th HumanoidCPU 777 203 10ms 17 May 2024 935th KatieLG 🇬🇧 777 203 10ms 26 Sep 2024 935th emgordon154 777 203 10ms 4 Dec 2024 935th CaedenHarper 🇨🇦 777 203 10ms 24 Jan 2025 935th Shanethegamer 🇺🇸 777 203 10ms 4 Feb 2025 935th rucin93 🇵🇱 777 203 10ms 23 Apr 2025 935th albanian-laundromat 777 203 10ms 20 Jul 2025 935th GolfingSuccess 🇬🇷 777 203 10ms 8 Nov 2025 935th snoozingnewt 🇨🇦 777 203 10ms 5 Dec 2025 935th JOrE20 777 203 11ms 17 Feb 2026 952nd UpwardProcess 776 61 5ms 26 Nov 2019 952nd DialFrost 🇸🇬 776 61 5ms 22 Dec 2023 954th ovs-code 🇩🇪 775 57 132ms 4 Aug 2024 954th voytxt 🇨🇿 775 57 141ms 5 Aug 2024 956th retrohun 775 59 488ms 20 Nov 2022 957th Steffan153 🇫🇮 775 62 1,299ms 8 days ago 958th 6512345 775 70 114ms 19 Nov 2025 958th DialFrost 🇸🇬 775 70 93ms 15 Dec 2025 960th Shanethegamer 🇺🇸 775 111 287ms 7 Feb 2024 First Prev 881–960 of 4,398 Next Last
