The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 4 days. Why not try and solve them ahead of time?
Fractions 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 561st MeWhenI 🇻🇦 818 106 1ms 25 Aug 2023 561st Vinterion 818 106 2ms 16 Jun 2024 561st Shanethegamer 🇺🇸 818 106 153ms 24 May 2025 564th Shanethegamer 🇺🇸 818 129 30ms 10 Feb 2026 565th DialFrost 🇸🇬 818 133 104ms 1 Dec 2025 566th UnderKoen 🇳🇱 816 129 14ms 19 Jun 2025 567th tobeannouncd 816 131 126ms 8 Jan 2024 568th SirBogman 🇺🇸 815 45 32ms 1 Apr 2022 568th greenstuartj 815 45 33ms 8 Jan 2024 570th iakolzin 815 133 453ms 9 Jun 2022 571st ovs-code 🇩🇪 815 194 12ms 8 Jul 2024 572nd lynn 814 78 6ms 15 Sep 2021 573rd primo-ppcg 🇹🇭 814 87 16ms 8 Sep 2021 573rd TheAtrossian 814 87 19ms 5 Jan 2025 575th nwellnhof 🇩🇪 814 128 426ms 21 Nov 2021 576th JayXon 🇺🇸 814 214 1,688ms 15 Sep 2025 577th KatieLG 🇬🇧 813 77 1,470ms 3 Sep 2021 578th DialFrost 🇸🇬 812 90 41ms 13 Feb 2025 578th ian-h-chamberlain 🇺🇸 812 90 40ms 20 Oct 2025 580th 386asm 🇺🇸 812 118 37ms 2 May 2023 581st didion0 🇺🇸 811 74 11ms 7 Sep 2021 581st jared-hughes 811 74 11ms 7 Mar 2022 581st ovs-code 🇩🇪 811 74 9ms 17 Nov 2024 584th madex 🇩🇪 811 107 2ms 13 days ago 585th namelessiw 811 153 370ms 10 Oct 2025 586th Quijx 809 107 113ms 14 Oct 2022 586th stefangimmillaro 809 107 101ms 21 Oct 2022 588th kaascevich 809 137 130ms 9 Jul 2025 589th emgordon154 808 79 24ms 16 Sep 2025 590th JDiLenarda 🇫🇷 808 146 1,375ms 16 Nov 2023 591st DialFrost 🇸🇬 807 145 43ms 6 May 2025 592nd ovs-code 🇩🇪 806 51 2ms 6 Dec 2023 593rd dokutan 806 82 8ms 5 May 2024 594th Steffan153 🇫🇮 806 102 45ms 24 days ago 595th TFeld00 🇩🇰 805 88 17ms 19 May 2022 595th neel11235813 805 88 17ms 6 Feb 2023 595th anter69 🇭🇺 805 88 17ms 19 Mar 2024 595th hellopir2 805 88 18ms 24 Nov 2025 595th plcc0 805 88 17ms 12 Jan 2026 600th orthoplex 🇨🇽 804 35 102ms 27 Oct 2021 600th Shanethegamer 🇺🇸 804 35 609ms 19 Apr 2022 600th galloj 🇨🇿 804 35 760ms 2 Feb 2023 603rd MeWhenI 🇻🇦 804 104 29ms 14 Dec 2024 603rd duckyluuk 🇳🇱 804 104 17ms 12 Jun 2025 605th Shanethegamer 🇺🇸 803 103 2,837ms 25 Oct 2025 606th snoozingnewt 🇨🇦 803 122 298ms 31 Oct 2025 607th MeWhenI 🇻🇦 803 135 436ms 8 May 2022 608th jakzo 800 75 11ms 8 Sep 2021 608th Irratix 🇳🇱 800 75 14ms 30 Apr 2022 610th Shanethegamer 🇺🇸 800 136 126ms 27 Nov 2025 610th edsrzf 🇳🇿 800 136 112ms 20 days ago 612th GrayJoKing 🇦🇺 799 132 31ms 1 Mar 2023 613th Shanethegamer 🇺🇸 799 161 57ms 25 Oct 2022 614th Shanethegamer 🇺🇸 798 80 8ms 12 Aug 2024 615th sisyphus-ppcg 🇦🇺 798 92 2ms 6 Sep 2021 616th rak1507 🇬🇧 797 46 33ms 4 Sep 2021 616th jared-hughes 797 46 33ms 25 May 2022 616th Natanaelel 🇸🇪 797 46 33ms 2 Nov 2023 619th GolfingSuccess 🇬🇷 796 83 6ms 11 Mar 2025 620th annaproxy 796 89 16ms 2 Oct 2023 620th qpwoeirut 796 89 17ms 23 Nov 2025 622nd ListeriaM 796 109 2ms 25 Aug 2023 622nd speles 🇺🇦 796 109 1ms 28 Oct 2023 622nd zacjl 796 109 2ms 4 Dec 2023 625th stefangimmillaro 796 147 43ms 26 Apr 2025 626th h3ra993huskp 🇯🇵 796 156 493ms 30 Nov 2025 627th lynn 796 158 210ms 17 Feb 2025 628th jared-hughes 795 94 18ms 27 Nov 2021 629th NewDefectus 🇮🇱 794 162 57ms 4 Sep 2021 630th dokutan 793 79 1,290ms 28 Mar 2025 631st edsrzf 🇳🇿 793 133 29ms 13 Feb 2026 632nd primo-ppcg 🇹🇭 792 53 38ms 6 Sep 2021 633rd ovs-code 🇩🇪 792 121 13ms 20 Jul 2023 634th arjanadriaanse 🇳🇱 792 135 140ms 29 Jan 2022 635th Yewzir 🇧🇪 791 137 2,871ms 24 May 2023 636th Salutations45 790 52 3ms 30 Dec 2024 637th ManuCoding 790 76 12ms 27 Sep 2021 637th itsh01 790 76 10ms 20 Oct 2021 637th Shanethegamer 🇺🇸 790 76 11ms 16 Oct 2022 637th MeWhenI 🇻🇦 790 76 11ms 9 May 2023 First Prev 561–640 of 2,002 Next Last