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 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 801st AdrienHache 🇫🇷 816 82 422ms 5 days ago 802nd detrumi 🇳🇱 816 85 129ms 4 Jan 2020 802nd scpchicken 🇵🇼 816 85 121ms 16 May 2022 802nd nullie 816 85 119ms 11 Nov 2023 802nd orifu 816 85 138ms 14 Oct 2024 802nd itljan30 816 85 134ms 26 Jan 2025 802nd snoozingnewt 🇨🇦 816 85 131ms 29 Sep 2025 808th DialFrost 🇸🇬 815 58 431ms 17 Jan 2024 808th SirBogman 🇺🇸 815 58 432ms 20 Jan 2024 808th Shanethegamer 🇺🇸 815 58 534ms 24 Mar 2024 808th emgordon154 815 58 478ms 12 Apr 2025 808th fuzzylojik-golf 🇺🇸 815 58 428ms 3 Jul 2025 808th albanian-laundromat 815 58 436ms 7 Oct 2025 814th janbehrens 🇩🇪 815 63 5ms 27 May 2021 815th primo-ppcg 🇹🇭 815 80 39ms 20 Jun 2022 815th GrayJoKing 🇦🇺 815 80 41ms 22 Jun 2022 815th 386asm 🇺🇸 815 80 39ms 16 Apr 2023 815th albanian-laundromat 815 80 43ms 3 Dec 2025 815th DialFrost 🇸🇬 815 80 41ms 15 Dec 2025 820th KasperKivimaeki 🇫🇮 815 89 452ms 30 Nov 2025 821st jared-hughes 815 97 428ms 24 Jun 2022 821st annaproxy 815 97 62ms 22 Jan 2023 821st eMGeeneer 815 97 432ms 24 Jul 2024 824th MeWhenI 🇻🇦 815 194 1,169ms 19 Apr 2025 824th primo-ppcg 🇹🇭 815 194 64ms 13 Aug 2025 826th Yewzir 🇧🇪 814 68 36ms 24 Dec 2024 827th adoxography 813 47 1,269ms 20 Jan 2022 827th Andriamanitra 🇫🇮 813 47 1,252ms 28 Jul 2023 829th eggplants 🇯🇵 813 50 34ms 26 Nov 2020 829th fitzdotlol 🇺🇸 813 50 37ms 27 Jan 2021 829th jared-hughes 813 50 36ms 20 Sep 2022 829th moozzi 813 50 34ms 7 Dec 2025 829th TheZwierzLF 🇵🇱 813 50 35ms 21 Dec 2025 829th Azyrod 813 50 36ms 3 Feb 2026 835th Yewzir 🇧🇪 811 61 2ms 6 Apr 2024 836th Steffan153 🇫🇮 810 57 2ms 6 days ago 837th Grrisly 810 62 17ms 27 Mar 2024 837th kg583 🇺🇸 810 62 16ms 14 Oct 2025 839th Kaffeleif 809 75 8ms 15 Dec 2023 840th GrayJoKing 🇦🇺 809 86 464ms 3 Mar 2022 840th DialFrost 🇸🇬 809 86 466ms 23 Jul 2024 840th emgordon154 809 86 453ms 27 May 2025 843rd jankaifer 808 58 9ms 8 Aug 2020 843rd raphaelimahorn 808 58 10ms 1 Sep 2020 843rd Athe81 808 58 11ms 4 Nov 2020 843rd ArmaanAS 808 58 12ms 21 Mar 2021 843rd kapouer 808 58 10ms 13 Aug 2021 843rd makinde 808 58 10ms 12 Nov 2022 843rd Betuaredead 808 58 10ms 7 Jan 2023 843rd piano-miles 808 58 11ms 30 Mar 2023 843rd Firefox760 808 58 10ms 23 Apr 2023 843rd canalun 808 58 10ms 25 May 2023 843rd olleicua 🇺🇸 808 58 9ms 10 Jan 2024 843rd goodwyna21 808 58 9ms 29 Oct 2024 843rd Xanderium 808 58 10ms 30 Aug 2025 843rd iczelia 🇩🇪 808 58 10ms 14 Oct 2025 843rd albanian-laundromat 808 58 11ms 18 Nov 2025 858th prplz 🇦🇺 808 71 40ms 21 Dec 2021 859th emgordon154 807 51 10ms 6 Jun 2025 860th GrayJoKing 🇦🇺 807 70 124ms 21 May 2022 860th Shanethegamer 🇺🇸 807 70 96ms 18 Feb 2023 860th jipsong 🇩🇪 807 70 104ms 22 Oct 2023 860th 6512345 807 70 114ms 19 Nov 2025 864th NewDefectus 🇮🇱 807 73 1ms 4 Oct 2020 864th prplz 🇦🇺 807 73 2ms 14 Oct 2020 864th emgordon154 807 73 1ms 29 Nov 2021 864th LorenzoDeGaspari 807 73 1ms 21 Jun 2022 864th Vinterion 807 73 1ms 12 Nov 2023 864th RealAMC 🇳🇿 807 73 1ms 15 Nov 2023 864th Flying-Toast 807 73 1ms 17 Apr 2024 871st AdrialaD 807 83 397ms 21 Nov 2021 871st ChristophHornung 807 83 383ms 21 Nov 2021 871st iznax 807 83 385ms 21 Nov 2021 871st primo-ppcg 🇹🇭 807 83 379ms 21 Nov 2021 871st prplz 🇦🇺 807 83 368ms 21 Nov 2021 871st revlayle 🇺🇸 807 83 371ms 21 Nov 2021 871st Rhexis 807 83 364ms 21 Nov 2021 871st aliakseikalosha 807 83 374ms 28 Jan 2022 871st Romain-1 🇫🇷 807 83 375ms 30 May 2022 871st Gaddy 🇫🇷 807 83 400ms 30 May 2022 First Prev 801–880 of 4,424 Next Last