The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 4 days. Why not try and solve them ahead of time?
Emirp Numbers in Rust 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 1st JayXon 🇺🇸 1,000 101 134ms 14 Jan 2022 1st acotis 1,000 101 123ms 28 Oct 2025 1st kumavale 1,000 101 125ms 28 Oct 2025 4th Lydxn 🇨🇦 990 102 133ms 26 Mar 2022 4th lynn 990 102 125ms 7 Jul 2024 4th emgordon154 990 102 132ms 18 Apr 2025 4th stefangimmillaro 990 102 130ms 18 May 2025 4th sean-niemann 🇺🇸 990 102 130ms 6 Jun 2025 4th Steffan153 🇫🇮 990 102 144ms 16 Feb 2026 10th andersk 🇺🇸 971 104 121ms 8 Nov 2022 10th edsrzf 🇳🇿 971 104 131ms 8 Jun 2025 12th verticallity 927 109 122ms 7 Apr 2022 13th primo-ppcg 🇹🇭 878 115 131ms 2 May 2022 14th prplz 🇦🇺 863 117 144ms 30 Apr 2022 15th dokutan 856 118 134ms 14 Apr 2024 16th detrumi 🇳🇱 777 130 123ms 26 Apr 2023 17th btjones0 771 131 144ms 28 Dec 2020 18th ovs-code 🇩🇪 765 132 138ms 25 Apr 2025 19th msbranicky 732 138 138ms 1 Oct 2023 20th elgan65536 🇺🇸 727 139 133ms 29 Sep 2023 21st frozolotl 716 141 151ms 8 Jan 2020 22nd luuumine 🇫🇷 711 142 144ms 8 Dec 2025 23rd WhoisDavid 706 143 149ms 14 Sep 2020 23rd Re-Adventures 🇮🇳 706 143 153ms 18 Aug 2023 25th MeWhenI 🇻🇦 701 144 150ms 13 Nov 2022 26th scpchicken 🇵🇼 692 146 135ms 23 Jan 2023 27th JGDoerrer 687 147 137ms 29 Jan 2022 27th fantaize 687 147 131ms 16 days ago 29th ian-h-chamberlain 🇺🇸 660 153 136ms 16 Dec 2025 30th timvermeulen 647 156 116ms 4 Jan 2020 30th SpareManiKatti 647 156 110ms 19 Apr 2022 30th retrohun 647 156 123ms 27 Dec 2022 30th klixel 🇨🇦 647 156 116ms 15 Apr 2023 30th HumanoidCPU 647 156 114ms 5 May 2024 30th Shanethegamer 🇺🇸 647 156 116ms 29 Aug 2024 30th Mabeloid 🇳🇴 647 156 115ms 17 Sep 2024 30th CaedenHarper 🇨🇦 647 156 111ms 13 Aug 2025 38th Aurel300 🇨🇭 643 157 112ms 3 Jun 2024 39th Yewzir 🇧🇪 635 159 129ms 27 Mar 2024 40th 1337-man 608 166 110ms 24 Jan 2022 41st Skepfyr 591 171 197ms 4 Jan 2020 42nd KatieLG 🇬🇧 564 179 167ms 30 Nov 2025 43rd Florian-Mt 561 180 215ms 12 Jul 2024 44th Starwort 🇬🇧 549 184 218ms 11 Nov 2022 45th Z-snails 546 185 210ms 1 Mar 2023 46th CarsonChr 🇺🇸 540 187 134ms 15 Jan 2024 47th zeerooth 🇵🇱 523 193 116ms 4 Feb 2021 47th mokymok 🇺🇸 523 193 111ms 8 Nov 2021 49th KatieLG-Transpiler 🇬🇧 521 194 116ms 24 Jun 2022 50th StHagel 505 200 201ms 24 Aug 2023 51st aazuspan 495 204 188ms 2 Dec 2021 51st snoozingnewt 🇨🇦 495 204 241ms 29 Sep 2025 53rd Domicnt 488 207 208ms 4 Jan 2023 54th sona-tau 479 211 205ms 10 Mar 2023 55th okaponta 455 222 237ms 11 Jan 2024 56th WatMan77 369 274 207ms 27 Jul 2025 57th anna099 354 285 212ms 22 Jul 2021 58th antonymerle 270 374 278ms 21 May 2020 59th yhm138 99 1,017 222ms 16 Feb 2025 1–59 of 59
