The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 25 hours. Why not try and solve them ahead of time?
Fibonacci in PHP in chars. 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 Chars Time Submitted 156th msbranicky 548 62 5ms 8 Sep 2023 156th eiburns 548 62 4ms 11 Sep 2023 156th JesseNoEyes 🇺🇸 548 62 5ms 25 Sep 2024 164th Onitech 540 63 4ms 14 Nov 2018 164th mrdamien 540 63 4ms 25 Mar 2019 164th marsdeat 540 63 4ms 16 Jul 2020 164th nortonbatista 540 63 5ms 31 Oct 2023 168th thejazex1 531 64 5ms 2 Oct 2019 168th fuerst-ede 531 64 4ms 8 Jul 2022 168th iqbal-hossain-momox 531 64 4ms 11 Jul 2023 168th piripasa 531 64 4ms 12 Jul 2023 168th azure-blondon 531 64 4ms 10 Jul 2024 168th andre-lameirinhas 🇵🇹 531 64 4ms 22 Jul 2024 174th MCausc78 🇺🇦 523 65 5ms 7 Jan 2023 174th jbirchevans 523 65 5ms 3 Aug 2023 174th asminog 523 65 4ms 4 Oct 2024 174th heanyang1 523 65 4ms 22 Apr 2025 178th stadamdoki 515 66 4ms 12 Apr 2021 178th janga1 515 66 4ms 19 Aug 2021 180th matthudgins 507 67 5ms 3 Apr 2019 180th jessegyger 507 67 5ms 22 Oct 2022 180th Zach1031 507 67 4ms 15 Nov 2025 183rd hacker112 🇸🇪 500 68 5ms 12 Jun 2024 184th arkcodes 493 69 4ms 27 Feb 2018 184th ConnorHowell 493 69 4ms 22 Mar 2018 184th martinnorling 🇸🇪 493 69 5ms 17 May 2022 187th phpboyscout 486 70 4ms 3 Sep 2019 187th Tonic-Box 486 70 5ms 6 Nov 2020 189th colios13 479 71 4ms 12 Aug 2020 190th miika 472 72 5ms 22 Nov 2019 191st YPuest 466 73 4ms 23 Jul 2024 192nd ANovelForStudy 459 74 4ms 9 Jun 2023 192nd MiranDaniel 🇨🇿 459 74 5ms 30 Aug 2023 194th sm1lko 453 75 4ms 14 Dec 2022 194th snobbywaterfowl 453 75 5ms 10 Jul 2025 196th FrederikHutfless 🇩🇪 442 77 5ms 22 Dec 2022 196th ApoChagi 442 77 5ms 25 Oct 2025 198th dwilmer 436 78 4ms 26 Feb 2018 199th FlorianGubler 425 80 5ms 23 Dec 2020 199th emgordon154 425 80 5ms 25 Jul 2024 201st FerryHupse 420 81 4ms 31 Jan 2020 202nd VVstatus 415 82 4ms 13 Aug 2020 203rd nico-bachner 410 83 4ms 28 Dec 2020 203rd dillon-duncando 410 83 134ms 21 Dec 2021 203rd bryanmytko 410 83 121ms 5 Jul 2022 206th mikerees 405 84 4ms 8 Nov 2017 207th janhabbo 395 86 5ms 2 Jul 2018 207th iTearo 🇷🇺 395 86 5ms 28 Sep 2020 209th johnennewdeeson 391 87 4ms 13 Oct 2017 210th abishek28007 386 88 5ms 7 Sep 2020 210th DaCuteRaccoon 386 88 122ms 3 Apr 2022 212th jodylecompte 382 89 5ms 30 Dec 2020 213th diwms 374 91 170ms 5 Apr 2019 213th pedromcsousa 🇵🇹 374 91 100ms 23 Nov 2020 215th blagovidov 370 92 5ms 14 Oct 2021 216th Naas13 366 93 95ms 15 Apr 2020 217th AdrianPop27 358 95 143ms 8 Apr 2019 218th PowershellKnut 🇳🇴 347 98 4ms 7 Jan 2024 219th it4e 343 99 158ms 25 Oct 2018 220th Threadzless 333 102 4ms 29 Oct 2018 221st kevinnaviapaiva 315 108 4ms 17 Feb 2025 222nd jtaxen 288 118 5ms 18 Mar 2022 223rd ansnaldo 264 129 5ms 22 Oct 2018 224th Cr3aHal0 252 135 74ms 5 Jul 2019 225th MRGAO-CR7 250 136 4ms 15 Oct 2018 226th retrohun 248 137 4ms 21 Dec 2018 227th adamiscoding 245 139 164ms 8 Nov 2017 227th HumanoidCPU 245 139 4ms 18 May 2024 227th Mabeloid 🇳🇴 245 139 4ms 18 Sep 2024 227th Herbert00709 🇵🇱 245 139 4ms 31 Oct 2024 227th CaedenHarper 🇨🇦 245 139 4ms 16 Aug 2025 232nd Canmaya 239 142 4ms 23 Dec 2020 233rd Redbowpatch101 238 143 4ms 12 Aug 2020 234th mokymok 🇺🇸 201 169 4ms 9 Nov 2021 234th KatieLG-Transpiler 🇬🇧 201 169 4ms 24 Jun 2022 236th jayanwar 153 222 4ms 31 Oct 2019 237th ahmedsliman 134 254 102ms 12 Jul 2023 238th mikemeier 117 290 4ms 8 Nov 2017 239th seanleken 97 351 134ms 31 Oct 2019 First Prev 161–239 of 239
