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?
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 639th akshatj27 🇦🇶 816 50 37ms 11 Jan 2022 642nd edsrzf 🇳🇿 816 89 14ms 13 Feb 2026 642nd kg583 🇺🇸 816 89 9ms 17 days ago 644th SirBogman 🇺🇸 814 52 270ms 26 Jan 2024 645th lynn 814 76 143ms 22 May 2021 646th Adix-null 🇱🇹 814 101 383ms 11 Dec 2025 647th jkelly467 813 84 2,573ms 21 Nov 2025 648th MeWhenI 🇻🇦 812 54 1,251ms 13 Nov 2022 649th Tenclea 812 61 9ms 26 Aug 2023 649th LukeBridges 🇬🇧 812 61 9ms 28 Nov 2024 649th iczelia 🇩🇪 812 61 10ms 15 Oct 2025 652nd Shanethegamer 🇺🇸 812 80 119ms 14 Oct 2022 652nd MeWhenI 🇻🇦 812 80 115ms 15 Oct 2022 654th DialFrost 🇸🇬 812 105 119ms 7 Apr 2025 655th MeWhenI 🇻🇦 811 54 1ms 4 Nov 2022 656th the-zammers 811 85 114ms 13 Oct 2023 656th tobeannouncd 811 85 117ms 8 Jan 2024 658th weliveinhell 🇭🇹 808 80 1ms 16 Sep 2023 658th TeodorDyakov 🇧🇬 808 80 2ms 30 Jun 2025 660th gjoacorp 🇬🇧 808 104 69ms 4 Aug 2025 661st MeWhenI 🇻🇦 807 37 2ms 27 Feb 2025 662nd lifthrasiir 🇰🇷 807 67 421ms 2 Dec 2024 662nd fuzzylojik-golf 🇺🇸 807 67 426ms 4 Jan 2026 664th lynn 806 36 42ms 22 Jul 2022 664th SirBogman 🇺🇸 806 36 41ms 12 Sep 2022 664th primo-ppcg 🇹🇭 806 36 45ms 8 Dec 2022 664th emgordon154 806 36 40ms 10 Sep 2024 668th qrico64 806 74 10ms 2 Feb 2021 668th bastienvoirin 🇫🇷 806 74 10ms 10 May 2021 668th mauro-1 🇮🇹 806 74 10ms 17 Aug 2021 668th petar-donchev 806 74 17ms 5 Dec 2021 668th knutae 🇳🇴 806 74 10ms 6 Dec 2021 668th clementblaudeau 806 74 18ms 27 Jan 2022 668th j-Ewan 806 74 17ms 1 Mar 2022 668th guilhem-roy 🇫🇷 806 74 16ms 3 Mar 2022 668th Irratix 🇳🇱 806 74 10ms 26 Apr 2022 668th Trunksistor 🇫🇷 806 74 18ms 19 May 2022 668th nstearns96 🇬🇧 806 74 19ms 12 Dec 2022 668th vishwathg 806 74 11ms 7 Apr 2023 668th dranjohn 806 74 10ms 11 Sep 2023 668th FlorianCassayre 🇫🇷 806 74 17ms 28 Sep 2023 668th rollershutter 806 74 16ms 23 Oct 2023 668th starfihs 806 74 28ms 5 Aug 2024 668th BREMAUCY 🇫🇷 806 74 10ms 12 Aug 2025 668th wobblybits 806 74 9ms 23 Aug 2025 668th 123mjb 806 74 17ms 23 Sep 2025 668th michelebastione 🇮🇹 806 74 10ms 3 Nov 2025 668th TheSecondComing123 806 74 10ms 5 Feb 2026 689th albanian-laundromat 806 78 2ms 20 Oct 2025 690th Matgc04 806 102 388ms 3 Jun 2023 691st cure-honey 🇯🇵 806 128 277ms 4 Jul 2021 691st jerrandolph 806 128 272ms 24 Sep 2025 693rd CaedenHarper 🇨🇦 805 56 1,060ms 30 Sep 2025 693rd albanian-laundromat 805 56 1,188ms 4 Nov 2025 695th DialFrost 🇸🇬 805 85 1,022ms 25 Feb 2025 696th stefangimmillaro 805 106 120ms 19 May 2024 696th edsrzf 🇳🇿 805 106 124ms 16 Nov 2024 696th nullie 805 106 140ms 28 Dec 2024 699th emgordon154 804 85 2,764ms 16 Nov 2024 700th Shanethegamer 🇺🇸 804 98 7ms 4 Oct 2024 701st LiquidPulsar 803 77 141ms 24 Jan 2023 702nd Shanethegamer 🇺🇸 802 86 125ms 2 Mar 2023 703rd MeWhenI 🇻🇦 801 84 38ms 14 Jun 2022 704th emplv 🇱🇻 801 115 24ms 30 Aug 2023 704th DialFrost 🇸🇬 801 115 25ms 24 Dec 2024 706th Waffle3z 800 51 34ms 7 Jan 2021 706th emgordon154 800 51 42ms 15 Nov 2024 708th ovs-code 🇩🇪 800 60 138ms 17 Nov 2024 709th edsrzf 🇳🇿 800 92 3ms 12 Nov 2025 710th janbehrens 🇩🇪 800 129 294ms 1 Jul 2021 711th dcgjb 799 53 242ms 30 Apr 2024 711th madex 🇩🇪 799 53 271ms 11 days ago 713th florton 799 62 10ms 29 Jan 2022 713th fitzdotlol 🇺🇸 799 62 11ms 29 Mar 2022 713th typeswitch-dev 🇵🇹 799 62 9ms 1 Aug 2023 716th thebuilder6 🇺🇸 798 81 2ms 23 Oct 2021 717th albanian-laundromat 797 55 2ms 24 Dec 2025 718th frankgraziano 796 205 12ms 1 Nov 2025 719th zbreit 🇺🇸 795 75 10ms 20 Aug 2021 719th RYNO8 795 75 11ms 26 Aug 2021 First Prev 641–720 of 2,057 Next Last