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 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 318th kg583 🇺🇸 908 56 669ms 30 Jan 2024 318th pardouin 🇫🇷 908 56 498ms 12 Jul 2024 318th CaedenHarper 🇨🇦 908 56 490ms 2 Sep 2025 324th marshallward 🇺🇸 908 62 43ms 19 Nov 2022 324th primo-ppcg 🇹🇭 908 62 41ms 20 Nov 2022 324th Lydxn 🇨🇦 908 62 42ms 20 Nov 2022 324th snoozingnewt 🇨🇦 908 62 44ms 19 days ago 328th JayXon 🇺🇸 908 66 2ms 20 Nov 2022 328th nwellnhof 🇩🇪 908 66 2ms 8 Mar 2023 330th clockworknazo 907 59 224ms 20 Nov 2022 330th Lydxn 🇨🇦 907 59 219ms 29 Jan 2023 330th ovs-code 🇩🇪 907 59 219ms 3 Feb 2023 330th GrayJoKing 🇦🇺 907 59 219ms 12 Oct 2023 330th Steffan153 🇫🇮 907 59 222ms 6 days ago 335th aDwarfNamedUrist 907 63 202ms 6 Dec 2022 335th eddiesmithxyz 907 63 200ms 9 Jan 2023 335th Z-snails 907 63 206ms 27 Feb 2023 335th nyson 907 63 203ms 24 Jun 2025 335th jacekwladzinski 907 63 195ms 8 Oct 2025 340th Steffan153 🇫🇮 907 74 116ms 22 Nov 2022 340th JayXon 🇺🇸 907 74 120ms 22 Nov 2022 340th DialFrost 🇸🇬 907 74 125ms 3 Jun 2024 340th sean-niemann 🇺🇸 907 74 111ms 5 Feb 2025 344th wh3n3v3r 🇨🇿 906 27 10ms 19 Nov 2024 345th Steffan153 🇫🇮 906 49 156ms 8 Aug 2024 345th emplv 🇱🇻 906 49 154ms 29 Oct 2024 345th lukegustafson 🇺🇸 906 49 148ms 20 May 2025 348th primo-ppcg 🇹🇭 906 75 327ms 20 Nov 2022 348th AlephSquirrel 906 75 325ms 13 Mar 2023 348th kg583 🇺🇸 906 75 313ms 28 Jan 2025 351st Lydxn 🇨🇦 906 84 466ms 16 May 2023 351st JayXon 🇺🇸 906 84 469ms 16 May 2023 353rd JayXon 🇺🇸 905 72 1,280ms 19 Nov 2022 353rd primo-ppcg 🇹🇭 905 72 1,298ms 20 Nov 2022 353rd Lydxn 🇨🇦 905 72 1,296ms 20 Nov 2022 353rd lynn 905 72 1,344ms 15 Dec 2024 353rd Steffan153 🇫🇮 905 72 1,277ms 8 days ago 358th primo-ppcg 🇹🇭 905 80 45ms 20 Nov 2022 358th Lydxn 🇨🇦 905 80 41ms 20 Nov 2022 358th 386asm 🇺🇸 905 80 40ms 16 Apr 2023 358th GrayJoKing 🇦🇺 905 80 42ms 27 Oct 2023 358th Steffan153 🇫🇮 905 80 42ms 2 Aug 2024 358th sean-niemann 🇺🇸 905 80 41ms 15 Jan 2025 358th albanian-laundromat 905 80 43ms 3 Dec 2025 358th DialFrost 🇸🇬 905 80 44ms 15 Dec 2025 366th dvargas46 🇺🇸 904 51 577ms 20 Nov 2022 367th MeWhenI 🇻🇦 904 72 10ms 31 Dec 2022 367th Shanethegamer 🇺🇸 904 72 11ms 18 Feb 2023 369th emplv 🇱🇻 903 59 13ms 22 Nov 2022 370th MeWhenI 🇻🇦 902 49 62ms 13 Aug 2024 370th DialFrost 🇸🇬 902 49 67ms 13 Aug 2024 370th Steffan153 🇫🇮 902 49 63ms 13 Aug 2024 370th btnlq 902 49 65ms 14 Aug 2024 370th Shanethegamer 🇺🇸 902 49 65ms 15 Aug 2024 370th ovs-code 🇩🇪 902 49 65ms 20 Aug 2024 370th lynn 902 49 66ms 15 Dec 2024 370th sean-niemann 🇺🇸 902 49 64ms 13 Jan 2025 378th ericlangedijk 🇸🇮 902 83 391ms 7 Dec 2022 378th prplz 🇦🇺 902 83 385ms 5 Jan 2023 378th stefangimmillaro 902 83 436ms 6 Feb 2023 378th btnlq 902 83 382ms 11 Mar 2023 378th Steffan153 🇫🇮 902 83 399ms 11 Mar 2023 378th nwellnhof 🇩🇪 902 83 392ms 11 Mar 2023 378th Matgc04 902 83 397ms 25 May 2023 378th AdrienHache 🇫🇷 902 83 409ms 13 Jun 2023 378th namelessiw 902 83 385ms 9 Apr 2025 378th tomtheisen 🇺🇸 902 83 421ms 10 Apr 2025 378th Yax42 🇫🇷 902 83 448ms 18 Jun 2025 378th MeWhenI 🇻🇦 902 83 401ms 19 Jun 2025 378th sean-niemann 🇺🇸 902 83 389ms 20 Jun 2025 378th DialFrost 🇸🇬 902 83 406ms 26 Jun 2025 378th fuzzylojik-golf 🇺🇸 902 83 389ms 28 Aug 2025 378th bilal2709 902 83 430ms 26 Jan 2026 394th primo-ppcg 🇹🇭 901 68 148ms 20 Nov 2022 394th MichalMarsalek 🇨🇿 901 68 144ms 18 Dec 2022 394th GrayJoKing 🇦🇺 901 68 140ms 14 Jan 2023 394th prestosilver 🇺🇸 901 68 148ms 13 days ago 398th JayXon 🇺🇸 901 71 141ms 19 Nov 2022 398th Lydxn 🇨🇦 901 71 144ms 20 Nov 2022 398th MeWhenI 🇻🇦 901 71 150ms 20 Aug 2024 First Prev 321–400 of 2,740 Next Last