The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 2 days. Why not try and solve them ahead of time?
Recamán 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 jared-hughes 771 41 34ms 25 May 2022 801st Natanaelel 🇸🇪 771 41 32ms 29 Oct 2023 803rd anter69 🇭🇺 770 57 1,270ms 24 Feb 2023 804th jared-hughes 769 53 34ms 10 Sep 2022 805th CatsAreFluffy 768 60 57ms 31 Jan 2023 806th ian-h-chamberlain 🇺🇸 768 111 136ms 22 Jun 2022 806th MeWhenI 🇻🇦 768 111 155ms 22 Jul 2024 808th SirBogman 🇺🇸 767 48 133ms 3 May 2021 809th albanian-laundromat 767 120 27ms 16 days ago 810th MeWhenI 🇻🇦 766 179 1,691ms 7 Nov 2025 811th richard-oelze 🇩🇪 765 78 17ms 13 May 2021 811th Kloppermand 🇩🇰 765 78 17ms 29 Nov 2021 811th Omega65536 🇩🇪 765 78 9ms 24 Nov 2022 811th Fanrco 765 78 11ms 4 Sep 2023 811th Techdude01 765 78 10ms 11 Jan 2024 811th Mabeloid 🇳🇴 765 78 10ms 3 Oct 2024 811th JunkIce 765 78 17ms 3 Dec 2024 811th Alban-Boissard 765 78 11ms 14 Jun 2025 819th stefangimmillaro 765 85 118ms 3 Oct 2023 820th SuperFola 765 136 32ms 6 days ago 821st Mikey-Beep 🇬🇧 764 89 16ms 5 Sep 2023 822nd Shanethegamer 🇺🇸 764 95 13ms 28 Dec 2023 823rd h3ra993huskp 🇯🇵 764 113 480ms 30 Nov 2025 824th Shanethegamer 🇺🇸 764 182 1,412ms 28 Mar 2025 825th CaedenHarper 🇨🇦 762 65 11ms 6 Sep 2025 826th CheeseCake628 🇳🇴 762 71 480ms 18 Oct 2025 827th CaedenHarper 🇨🇦 761 108 361ms 20 Oct 2025 828th MeWhenI 🇻🇦 761 131 5ms 26 Aug 2023 829th MeWhenI 🇻🇦 760 183 1,412ms 28 Mar 2025 830th edsrzf 🇳🇿 758 104 6ms 28 Sep 2024 831st m-tkach 🇺🇦 757 83 2ms 26 Oct 2022 832nd Alex-x90 🇺🇸 757 111 61ms 11 May 2024 833rd yzhs 🇩🇪 756 58 1,269ms 3 Aug 2021 834th OhmNomNom 755 54 35ms 16 Oct 2022 835th Brianzhengca 755 79 17ms 2 Feb 2021 835th feherd 755 79 10ms 4 Mar 2022 835th petroselo 755 79 16ms 12 Apr 2022 835th rowboat1 755 79 27ms 21 Jun 2022 835th Ripick 755 79 10ms 13 Aug 2022 835th Eilonlif 🇮🇱 755 79 17ms 7 Sep 2022 835th jsthope 755 79 10ms 28 Sep 2022 835th QuincyNash 🇺🇸 755 79 10ms 29 Nov 2022 835th celiendonze 🇨🇭 755 79 10ms 17 Apr 2023 835th kaptsanovb 755 79 10ms 23 Sep 2023 835th ridingqwerty 🇺🇸 755 79 10ms 5 Feb 2024 835th zgialor-lab 755 79 10ms 27 Feb 2026 847th edsrzf 🇳🇿 753 62 5ms 28 Sep 2024 848th janbehrens 🇩🇪 752 69 365ms 10 Nov 2021 849th DialFrost 🇸🇬 751 185 1,444ms 20 Jan 2025 850th kurkale6ka 750 48 3ms 18 May 2021 851st MeWhenI 🇻🇦 750 64 138ms 25 Oct 2024 851st emgordon154 750 64 141ms 5 Jan 2025 853rd aaronze 🇦🇺 750 66 10ms 27 Apr 2021 853rd alasdair-greenland 750 66 10ms 28 Oct 2021 853rd aksyristos 750 66 10ms 30 Dec 2022 856th HumanoidCPU 750 89 137ms 23 Dec 2025 857th sean-niemann 🇺🇸 749 92 122ms 1 Jul 2023 857th TrueBoxGuy 749 92 120ms 17 Jul 2024 857th iczelia 🇩🇪 749 92 117ms 19 Oct 2025 860th jared-hughes 748 55 4ms 6 Oct 2022 861st edsrzf 🇳🇿 748 107 6ms 19 days ago 862nd Bubbler-4 747 96 4ms 14 Jul 2023 863rd postie77 747 110 401ms 8 Sep 2023 864th Shanethegamer 🇺🇸 746 79 4ms 22 Apr 2023 865th timchu 746 80 9ms 8 Mar 2021 865th jameslindesay 746 80 17ms 24 Mar 2021 865th AIn0n 746 80 10ms 8 Jul 2021 865th myleopard 746 80 9ms 13 Oct 2021 865th abba23 746 80 16ms 24 May 2022 865th alexjurkiewicz 🇦🇺 746 80 10ms 16 Jul 2022 865th PyryL 🇫🇮 746 80 10ms 25 Aug 2024 865th alemelis 746 80 11ms 17 Oct 2024 865th Europe2048 746 80 10ms 25 Nov 2024 865th jacekwladzinski 746 80 10ms 4 Oct 2025 875th GolfingSuccess 🇬🇷 744 39 42ms 22 Jul 2022 876th TimCurwick 🇺🇸 743 57 276ms 26 Jan 2021 877th Kacarott 🇦🇺 743 70 67ms 13 Sep 2024 878th stefangimmillaro 742 92 2,520ms 10 Nov 2024 879th Shanethegamer 🇺🇸 742 120 29ms 27 Dec 2022 880th KatieLG 🇬🇧 741 73 443ms 15 Jan 2024 First Prev 801–880 of 2,060 Next Last