The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 6 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 537th 77Tigers 840 71 16ms 9 Jan 2026 537th FoxInTheClouds 840 71 16ms 5 Feb 2026 563rd DialFrost 🇸🇬 839 49 3ms 30 Oct 2024 564th Maznek 839 59 10ms 27 Dec 2023 565th xkacer 🇨🇿 839 77 1ms 7 Feb 2021 565th iczelia 🇩🇪 839 77 2ms 16 Jan 2026 565th FoxInTheClouds 839 77 2ms 5 Feb 2026 568th stefangimmillaro 839 123 290ms 14 Jun 2023 569th sean-niemann 🇺🇸 838 75 2ms 18 Jan 2025 570th MeWhenI 🇻🇦 836 74 2ms 31 Dec 2022 571st sean-niemann 🇺🇸 834 54 962ms 6 Dec 2025 571st Steffan153 🇫🇮 834 54 710ms 13 Feb 2026 573rd Shanethegamer 🇺🇸 834 77 90ms 17 Mar 2023 574th bbakersmith 834 82 46ms 1 Aug 2021 575th janbehrens 🇩🇪 833 56 5ms 8 Jun 2021 576th DialFrost 🇸🇬 833 82 2,675ms 25 Oct 2024 577th SirBogman 🇺🇸 832 49 35ms 28 Dec 2020 577th gilufin 832 49 36ms 8 Aug 2021 577th m-tkach 🇺🇦 832 49 36ms 14 Feb 2023 577th olleicua 🇺🇸 832 49 35ms 20 Jan 2024 581st argusdusty 🇺🇸 832 124 293ms 27 Dec 2020 581st Shanethegamer 🇺🇸 832 124 280ms 7 Apr 2022 583rd alicethecatwhisperermeow 830 99 395ms 7 Aug 2024 584th rak1507 🇬🇧 829 35 2ms 10 Jan 2022 584th SirBogman 🇺🇸 829 35 2ms 17 Nov 2023 586th jacklynnepenick 829 72 17ms 26 Aug 2021 586th nullie 829 72 9ms 14 Jun 2022 586th commandz0 🇺🇸 829 72 10ms 18 Aug 2022 586th jakobkordez 🇸🇮 829 72 10ms 7 Nov 2022 586th CheeseCake628 🇳🇴 829 72 10ms 6 Mar 2023 586th fourth-bit 829 72 16ms 3 Jul 2023 586th jipsong 🇩🇪 829 72 10ms 23 Jul 2024 586th Terobero 829 72 18ms 21 Aug 2024 586th edsrzf 🇳🇿 829 72 18ms 28 Sep 2024 586th jamesthekee 829 72 10ms 26 Jan 2025 586th dirckvdende 829 72 11ms 20 Jul 2025 586th xiaoyiming123 829 72 10ms 11 Aug 2025 586th Alex-Huggett 🇬🇧 829 72 11ms 14 Sep 2025 586th Emutis 🇱🇹 829 72 10ms 24 days ago 600th lynn 829 82 12ms 16 Nov 2021 601st DialFrost 🇸🇬 829 95 8ms 12 Dec 2024 602nd DialFrost 🇸🇬 828 53 1,336ms 20 Jul 2024 603rd Steffan153 🇫🇮 828 59 90ms 14 Dec 2022 604th namcartoon06 828 78 2ms 30 Jun 2023 605th Salutations45 827 53 2ms 11 Dec 2024 606th coreynash 825 60 10ms 14 Feb 2024 606th penbuvt 825 60 9ms 7 Nov 2024 608th DialFrost 🇸🇬 823 79 122ms 13 Jul 2024 609th tigerdan2 🇩🇪 822 105 466ms 30 Nov 2025 610th Shanethegamer 🇺🇸 821 98 466ms 1 Mar 2022 611th GrayJoKing 🇦🇺 819 44 3ms 30 Apr 2021 611th o0lit3 🇺🇸 819 44 3ms 25 Jun 2021 611th perlebach 🇨🇿 819 44 3ms 19 Aug 2021 614th edsrzf 🇳🇿 819 55 1,182ms 2 Sep 2025 615th GolfingSuccess 🇬🇷 819 66 442ms 15 Jan 2024 615th SirBogman 🇺🇸 819 66 442ms 20 Jan 2024 615th Shanethegamer 🇺🇸 819 66 392ms 12 Mar 2024 615th HumanoidCPU 819 66 424ms 17 Jun 2024 619th kkoenig 819 126 287ms 3 Jan 2024 619th KasperKivimaeki 🇫🇮 819 126 302ms 4 Oct 2025 621st Starwort 🇬🇧 818 79 1ms 11 Nov 2022 622nd KatieLG 🇬🇧 817 73 10ms 27 Dec 2020 622nd AkashTandon167 817 73 17ms 28 Dec 2020 622nd NewDefectus 🇮🇱 817 73 10ms 28 Dec 2020 622nd TobyBoyne 🇬🇧 817 73 16ms 30 Dec 2020 622nd NanduBC 817 73 24ms 23 Mar 2021 622nd face0xff 817 73 17ms 20 Oct 2021 622nd RDShah 817 73 9ms 15 May 2022 622nd StefanHabel 🇨🇦 817 73 10ms 31 Dec 2022 622nd betaveros 817 73 18ms 31 Dec 2022 622nd levavft 817 73 10ms 26 Oct 2023 622nd mstang107 817 73 17ms 20 Dec 2023 622nd SB-945 817 73 10ms 28 Feb 2024 622nd Andrey135296 817 73 11ms 17 Sep 2024 622nd lhulinsky 817 73 11ms 22 Oct 2024 622nd wh3n3v3r 🇨🇿 817 73 10ms 13 Nov 2024 622nd moustave 817 73 17ms 10 Dec 2024 638th Shanethegamer 🇺🇸 816 50 38ms 11 May 2021 638th olivermrose 🇺🇸 816 50 37ms 21 Sep 2021 638th akshatj27 🇦🇶 816 50 37ms 11 Jan 2022 First Prev 561–640 of 2,056 Next Last