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?
Arabic to Roman 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 321st JayXon 🇺🇸 852 120 11ms 4 May 2022 322nd AlephSquirrel 852 122 509ms 21 Jan 2024 323rd kg583 🇺🇸 850 142 26ms 15 Mar 2024 323rd bizy-coder 850 142 41ms 26 Nov 2025 325th edsrzf 🇳🇿 849 151 7ms 24 Feb 2026 326th massung 847 57 17ms 26 Mar 2019 326th FlorianCassayre 🇫🇷 847 57 20ms 12 Sep 2023 328th typeswitch-dev 🇵🇹 847 172 5ms 22 Jul 2023 329th edsrzf 🇳🇿 846 107 1,442ms 1 Sep 2025 330th Steffan153 🇫🇮 845 112 13ms 12 Feb 2026 331st MeWhenI 🇻🇦 845 260 1,774ms 22 Apr 2024 332nd ZakkkkAttackkkk 🇵🇭 844 143 21ms 14 Nov 2021 332nd bricknellj 844 143 19ms 3 Nov 2022 332nd vishwathg 844 143 369ms 8 Sep 2023 332nd neel11235813 844 143 23ms 24 Feb 2024 332nd ahmetdemirag 🇨🇾 844 143 24ms 9 Mar 2025 337th inventshah 843 160 660ms 24 Jan 2023 338th nwellnhof 🇩🇪 840 89 16ms 18 Oct 2022 339th Steffan153 🇫🇮 839 175 32ms 12 Feb 2026 340th GrayJoKing 🇦🇺 838 81 386ms 5 Oct 2020 341st TFeld00 🇩🇰 838 144 52ms 21 Apr 2022 341st jared-hughes 838 144 19ms 14 Mar 2023 341st MeWhenI 🇻🇦 838 144 43ms 17 Apr 2025 344th GrayJoKing 🇦🇺 838 150 70ms 20 Nov 2025 345th synt7x 🇺🇸 838 153 10ms 4 Jul 2025 346th primo-ppcg 🇹🇭 835 298 1,142ms 13 Aug 2025 347th sisyphus-ppcg 🇦🇺 834 98 47ms 25 Sep 2021 347th sean-niemann 🇺🇸 834 98 40ms 14 Aug 2025 349th sean-niemann 🇺🇸 833 140 13ms 15 Jan 2024 350th namelessiw 833 143 479ms 15 Jun 2024 351st DialFrost 🇸🇬 833 172 29ms 15 Apr 2025 351st sean-niemann 🇺🇸 833 172 29ms 25 Apr 2025 353rd ovs-code 🇩🇪 833 316 1,594ms 2 Feb 2025 354th Natanaelel 🇸🇪 832 58 21ms 12 Sep 2021 354th AlephSquirrel 832 58 117ms 31 May 2023 354th msbranicky 832 58 23ms 28 Aug 2023 354th commandz0 🇺🇸 832 58 19ms 23 Nov 2023 358th tpaxman 🇨🇦 832 145 28ms 17 Dec 2020 358th rowechenzhong 832 145 29ms 26 Nov 2021 358th btjones0 832 145 20ms 16 Jul 2022 358th lifthrasiir 🇰🇷 832 145 831ms 12 Nov 2024 358th Lv0Sys 🇵🇱 832 145 21ms 19 Feb 2026 358th Flekay 🇩🇪 832 145 20ms 23 days ago 358th snoozingnewt 🇨🇦 832 145 20ms 22 days ago 365th andersk 🇺🇸 832 198 179ms 16 Mar 2020 366th stefangimmillaro 831 182 183ms 10 Nov 2024 367th BrunoVisnadi 🇧🇷 827 146 19ms 26 Sep 2025 368th DialFrost 🇸🇬 826 99 44ms 15 Apr 2025 369th GolfingSuccess 🇬🇷 825 126 598ms 25 Jan 2025 370th Shanethegamer 🇺🇸 824 95 67ms 30 Jun 2022 370th dokutan 824 95 66ms 8 Sep 2025 372nd rhdqor213 824 124 10ms 11 Dec 2024 373rd edsrzf 🇳🇿 824 189 317ms 21 Jul 2025 374th DialFrost 🇸🇬 823 110 1,461ms 15 Apr 2025 375th acotis 823 200 216ms 20 Apr 2025 375th ovs-code 🇩🇪 823 200 178ms 24 Apr 2025 377th Yewzir 🇧🇪 823 267 1,876ms 25 May 2024 378th frankgraziano 822 158 33ms 24 Feb 2026 379th MeWhenI 🇻🇦 821 142 16ms 11 Oct 2023 380th davecame 821 147 21ms 27 Mar 2024 380th Artemis21 🇬🇧 821 147 41ms 30 Dec 2024 380th bzijlema 🇳🇱 821 147 49ms 14 Jan 2026 383rd Steffan153 🇫🇮 821 156 26ms 30 May 2024 384th kg583 🇺🇸 819 127 524ms 23 Feb 2024 385th lynn 819 201 185ms 9 Jan 2025 386th Ripick 818 59 23ms 17 Mar 2024 387th Shanethegamer 🇺🇸 816 49 103ms 7 Dec 2024 387th fuzzylojik-golf 🇺🇸 816 49 97ms 9 Sep 2025 387th edsrzf 🇳🇿 816 49 100ms 17 days ago 390th luftj 816 148 30ms 23 Apr 2020 390th Stockoh 🇫🇷 816 148 39ms 5 May 2023 390th janbehrens 🇩🇪 816 148 20ms 17 Jun 2023 390th edsrzf 🇳🇿 816 148 21ms 22 Jul 2025 394th emgordon154 815 96 100ms 119 mins ago 395th user189032 815 179 327ms 29 May 2019 396th MeWhenI 🇻🇦 814 176 16ms 16 Apr 2025 397th sean-niemann 🇺🇸 814 178 589ms 24 Sep 2025 398th primo-ppcg 🇹🇭 813 131 220ms 25 Dec 2020 399th emplv 🇱🇻 812 113 21ms 7 Apr 2022 400th primo-ppcg 🇹🇭 812 153 404ms 15 Jan 2021 First Prev 321–400 of 1,913 Next Last