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?
Divisors in JavaScript 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 477th null-tangent 636 77 12ms 4 Aug 2022 477th trist224 🇫🇷 636 77 12ms 9 Nov 2022 477th StronkCheese 🇺🇸 636 77 13ms 31 Jan 2023 477th blobotic 636 77 10ms 13 Jun 2023 477th sylvrs 636 77 10ms 10 May 2025 486th Enkuryo 🇩🇪 628 78 11ms 3 Jul 2019 486th dhong9 628 78 11ms 17 Aug 2019 486th TrAyZeN 628 78 12ms 18 Aug 2019 486th tickct 628 78 11ms 13 Sep 2019 486th Michal-Miky-Jankovsky 628 78 14ms 1 May 2020 486th henrygagnier 628 78 9ms 19 Nov 2024 492nd Erutuon 613 80 10ms 21 Feb 2018 492nd YoungjuneKwon 613 80 11ms 22 Jan 2019 492nd Kauhentus 613 80 11ms 7 Dec 2019 492nd the-north-dev 613 80 11ms 27 Aug 2020 492nd dteague3989 613 80 10ms 3 Aug 2023 492nd Florian-Mt 613 80 10ms 23 Oct 2023 498th ted 605 81 11ms 17 Apr 2018 498th rumblesan 605 81 10ms 8 Dec 2018 498th adoxography 605 81 10ms 6 Feb 2019 498th felixpackard 605 81 11ms 16 Mar 2020 498th catileptic 605 81 11ms 8 Feb 2021 498th DCerane 605 81 11ms 14 Oct 2022 498th dbkirk4211 605 81 11ms 3 May 2024 505th Unremarkable 598 82 12ms 28 Sep 2018 505th joshuaferrara 598 82 13ms 9 Apr 2019 505th alexjharrison 598 82 11ms 2 Jul 2019 505th hvanderdys 598 82 10ms 26 May 2020 505th hacker19374 598 82 11ms 8 Mar 2023 505th JesseNoEyes 🇺🇸 598 82 10ms 12 Nov 2024 505th xShadowBlade 598 82 11ms 19 Nov 2024 505th SebassNoob 598 82 12ms 5 Aug 2025 513th drewradcliff 590 83 10ms 13 Jun 2019 513th volpi-m 🇫🇷 590 83 11ms 31 Aug 2020 513th usernamethatisnttaken 590 83 12ms 6 Sep 2023 516th tfk333 583 84 11ms 23 Feb 2018 516th jacobsmith-fusionalliance 583 84 11ms 11 Dec 2018 516th richard-oelze 🇩🇪 583 84 11ms 25 Sep 2020 519th sharabiania 576 85 10ms 2 Mar 2018 519th AkashSouravNayak 576 85 10ms 15 Jul 2018 519th oscarlvp 576 85 11ms 30 Apr 2019 519th Nucaranlaeg 576 85 11ms 8 May 2019 519th spencersolberg 576 85 9ms 8 Jun 2021 519th Ploverums 576 85 10ms 8 Sep 2022 519th Geird 576 85 10ms 20 Feb 2023 526th Alice-Cheshire 570 86 11ms 26 Feb 2018 526th biinari 570 86 12ms 18 Mar 2018 526th jpnelson 570 86 12ms 4 May 2018 526th zombocoder 570 86 10ms 5 May 2020 526th Efren071 570 86 11ms 16 Apr 2022 526th clayboll99 570 86 11ms 18 Jul 2025 532nd Kladdkaka 563 87 10ms 9 Feb 2018 532nd Osilos 563 87 11ms 30 May 2018 532nd Antracen 563 87 12ms 19 Oct 2018 532nd matthudgins 563 87 10ms 28 Mar 2019 532nd ldevernay 563 87 11ms 10 Apr 2019 532nd stanley-c-so 563 87 11ms 22 Oct 2019 532nd Redbowpatch101 563 87 11ms 6 Apr 2021 532nd ComputerKWasTaken 🇺🇸 563 87 16ms 20 Jan 2025 540th itsfolf 557 88 12ms 9 Jul 2018 540th sghofrany 557 88 11ms 17 Oct 2019 542nd ObserverOfTime 551 89 12ms 4 Sep 2018 542nd rowboat1 551 89 12ms 16 Feb 2019 542nd pritchard588 551 89 9ms 8 Nov 2020 542nd bryncoldwell 551 89 11ms 26 May 2021 542nd deniz-blue 551 89 12ms 20 Oct 2023 547th MyXoToD 🇩🇪 538 91 10ms 8 May 2025 548th aberthier 533 92 11ms 1 Mar 2018 549th Mefred 527 93 13ms 25 Nov 2025 550th moonbuffalo 521 94 10ms 8 May 2019 550th ZippyMagician 521 94 11ms 6 Jun 2020 550th VictorFordham 521 94 10ms 8 Aug 2020 550th pantharev 521 94 11ms 1 Dec 2022 550th apokryfos 521 94 10ms 18 Aug 2023 555th minerGolfer 516 95 10ms 13 May 2018 555th MicheleV 516 95 10ms 20 May 2018 557th bpedro 500 98 10ms 16 Sep 2019 557th anbcodes 500 98 12ms 29 Sep 2019 559th Axel-AMGHAR 490 100 9ms 3 Nov 2020 560th Brian-T-Hart 480 102 11ms 5 Feb 2018 First Prev 481–560 of 603 Next Last