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?
Emirp 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 875th olivermrose 🇺🇸 744 52 119ms 20 Sep 2021 875th krcs 🇵🇱 744 52 125ms 21 Apr 2022 875th MeWhenI 🇻🇦 744 52 124ms 4 Aug 2022 875th trist224 🇫🇷 744 52 125ms 28 Nov 2022 875th neel11235813 744 52 127ms 3 Feb 2023 886th Irratix 🇳🇱 743 111 296ms 15 Mar 2021 887th labster 742 64 65ms 23 Feb 2018 887th nwellnhof 🇩🇪 742 64 3ms 14 Jul 2022 889th ovs-code 🇩🇪 742 80 1,241ms 25 Jan 2024 890th JOrE20 742 86 22ms 11 Feb 2026 891st dokutan 742 116 100ms 12 Dec 2025 892nd btjones0 741 97 266ms 28 Dec 2020 893rd Shanethegamer 🇺🇸 739 72 67ms 27 Dec 2024 893rd fuzzylojik-golf 🇺🇸 739 72 61ms 17 Sep 2025 895th Irratix 🇳🇱 739 130 365ms 3 Jan 2022 896th Faweks1 738 89 17ms 1 Aug 2018 896th IshanPanpaliya 738 89 85ms 2 Apr 2022 896th kellantech 738 89 10ms 3 Jun 2023 896th zwxzwxzwx21 738 89 10ms 7 Feb 2024 900th treeowl 738 102 134ms 27 Feb 2019 900th RussellEmerine 738 102 140ms 30 Nov 2019 902nd fuzzylojik-golf 🇺🇸 737 85 433ms 6 Jul 2025 903rd inventshah 737 100 2ms 9 Sep 2022 903rd Yewzir 🇧🇪 737 100 2ms 22 Dec 2023 903rd albanian-laundromat 737 100 2ms 24 Jun 2025 906th hugolgst 736 77 41ms 15 Jun 2019 906th reireias 736 77 43ms 30 Jul 2019 906th Haksell 🇦🇶 736 77 39ms 22 Feb 2023 906th LostSyntax21 🇬🇧 736 77 39ms 25 Aug 2024 910th lynn 736 97 1,021ms 10 Nov 2021 911th gnuvince 735 34 2ms 28 Jun 2025 912th ian-odonnell 734 87 10ms 5 Mar 2018 912th Yax42 🇫🇷 734 87 12ms 26 Jan 2026 914th typeswitch-dev 🇵🇹 732 93 4ms 27 Aug 2023 915th janbehrens 🇩🇪 730 88 7ms 15 Jun 2021 916th neihousaigaai 730 90 11ms 31 Oct 2022 917th dokutan 730 101 2ms 27 Mar 2024 918th Johannesd3 730 103 157ms 8 Sep 2019 918th strout 730 103 165ms 15 Aug 2022 920th msbranicky 729 214 10ms 29 Aug 2023 921st greghull 726 78 39ms 8 Nov 2017 921st tadd 726 78 43ms 16 Apr 2020 921st hiddicop 🇸🇪 726 78 44ms 31 Jan 2021 921st schachmattmatt 726 78 41ms 26 Sep 2021 925th CaedenHarper 🇨🇦 726 84 1,141ms 23 Sep 2025 926th Maznek 725 88 11ms 22 Jun 2023 927th MeWhenI 🇻🇦 725 109 2ms 10 Oct 2023 928th achimkrause 723 104 220ms 11 Jul 2018 929th janbehrens 🇩🇪 723 114 1ms 17 Aug 2021 930th janbehrens 🇩🇪 723 133 75ms 8 Jan 2022 931st retrohun 722 91 28ms 29 Oct 2022 931st trist224 🇫🇷 722 91 10ms 15 Nov 2022 931st alemelis 722 91 11ms 1 Sep 2024 934th detrumi 🇳🇱 722 130 123ms 26 Apr 2023 935th dokutan 721 105 85ms 23 Jul 2025 936th jmerle 🇳🇱 721 134 7ms 4 Jul 2023 937th dloscutoff 720 83 299ms 27 Nov 2018 937th MeWhenI 🇻🇦 720 83 361ms 15 Feb 2023 939th CatsAreFluffy 720 87 413ms 15 Jan 2024 939th namelessiw 720 87 382ms 5 Mar 2024 941st markobr 719 66 70ms 29 Oct 2017 942nd Yewzir 🇧🇪 718 85 827ms 16 Nov 2025 943rd rucin93 🇵🇱 718 110 12ms 18 Nov 2025 944th RustemB 🇷🇺 717 54 90ms 3 Jan 2021 945th Mir0ff944 717 79 42ms 17 Oct 2019 945th fuzzylojik-golf 🇺🇸 717 79 37ms 6 Jul 2025 947th rak1507 🇬🇧 717 105 173ms 18 Jan 2021 948th filharmonista 717 115 298ms 13 Mar 2020 949th btjones0 717 131 144ms 28 Dec 2020 950th Steffan153 🇫🇮 716 135 7ms 12 Mar 2023 950th annaproxy 716 135 8ms 12 Mar 2023 950th Shanethegamer 🇺🇸 716 135 7ms 12 Mar 2023 950th lynn 716 135 7ms 13 Mar 2023 950th JayXon 🇺🇸 716 135 7ms 13 Mar 2023 950th ovs-code 🇩🇪 716 135 7ms 13 Mar 2023 950th Lydxn 🇨🇦 716 135 7ms 13 Mar 2023 950th dokutan 716 135 7ms 1 Apr 2023 950th MeWhenI 🇻🇦 716 135 7ms 23 Nov 2023 950th Yewzir 🇧🇪 716 135 7ms 6 Mar 2024 950th KatieLG 🇬🇧 716 135 7ms 31 Jul 2024 First Prev 881–960 of 3,206 Next Last
