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?
Leyland Numbers 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 476th JunkIce 846 84 10ms 24 Nov 2024 476th Lv0Sys 🇵🇱 846 84 10ms 3 Dec 2025 476th Googolplexo 🇷🇺 846 84 15ms 11 hours ago 484th emgordon154 846 234 1,456ms 11 Jan 2026 485th stefangimmillaro 845 73 1,275ms 5 Dec 2024 486th Sp3000 🇦🇺 845 112 101ms 13 Jan 2024 487th KasperKivimaeki 🇫🇮 845 125 3ms 11 Nov 2025 488th ovs-code 🇩🇪 845 176 300ms 25 Aug 2023 489th arjanadriaanse 🇳🇱 844 81 129ms 10 Feb 2022 489th aDwarfNamedUrist 844 81 127ms 6 Dec 2022 491st DialFrost 🇸🇬 843 67 655ms 9 Jun 2024 492nd primo-ppcg 🇹🇭 843 90 16ms 6 Feb 2022 493rd Steffan153 🇫🇮 843 117 137ms 8 Apr 2023 494th DialFrost 🇸🇬 843 123 2,838ms 1 Mar 2025 495th Shanethegamer 🇺🇸 842 67 4ms 17 Aug 2024 496th elgan65536 🇺🇸 842 142 227ms 6 Jul 2024 497th SirBogman 🇺🇸 841 56 121ms 29 Nov 2021 497th Natanaelel 🇸🇪 841 56 117ms 9 Dec 2021 499th primo-ppcg 🇹🇭 840 56 145ms 15 Sep 2020 499th JayXon 🇺🇸 840 56 121ms 9 Jan 2022 501st Yax42 🇫🇷 840 135 409ms 13 Oct 2025 502nd GrayJoKing 🇦🇺 839 121 56ms 10 Mar 2023 503rd nwellnhof 🇩🇪 839 126 2ms 22 Aug 2020 504th MeWhenI 🇻🇦 839 234 1,705ms 7 Nov 2025 505th abailey2020 🇺🇸 836 85 10ms 10 Dec 2020 505th Secozzi 836 85 14ms 21 Mar 2021 505th mokymok 🇺🇸 836 85 11ms 22 Jul 2021 505th tkr-sh 🇰🇵 836 85 81ms 29 Apr 2022 505th 2011-Chan-Ethan 836 85 12ms 19 Jul 2023 505th jtaxen 836 85 11ms 29 Apr 2024 505th cros107 🇦🇺 836 85 16ms 11 Jul 2024 505th hiichbindermax 836 85 12ms 17 Sep 2024 505th RaBa21 🇭🇺 836 85 84ms 17 Jul 2025 505th wuduculfre 836 85 10ms 22 Jul 2025 515th primo-ppcg 🇹🇭 836 109 9ms 5 Feb 2025 516th RobertHoeh 834 82 229ms 1 Feb 2024 516th YAJUE114514 834 82 117ms 15 Jul 2025 518th m-tkach 🇺🇦 832 127 2ms 30 Aug 2023 519th lynn 831 54 889ms 13 Apr 2021 520th dcgjb 831 68 277ms 3 May 2024 521st primo-ppcg 🇹🇭 831 179 298ms 22 Aug 2020 522nd zacjl 830 42 5ms 2 Nov 2025 523rd primo-ppcg 🇹🇭 828 116 200ms 17 Aug 2021 524th DialFrost 🇸🇬 827 69 103ms 1 Nov 2024 525th DialFrost 🇸🇬 827 72 1,149ms 4 Sep 2025 525th albanian-laundromat 827 72 1,109ms 22 Sep 2025 527th edsrzf 🇳🇿 827 141 29ms 10 Feb 2026 528th ovs-code 🇩🇪 826 57 119ms 27 May 2024 529th sk- 826 86 12ms 11 Sep 2020 529th Loag 826 86 12ms 14 Nov 2021 529th Re-Adventures 🇮🇳 826 86 26ms 1 Dec 2021 529th Irratix 🇳🇱 826 86 11ms 16 Apr 2022 529th QuincyNash 🇺🇸 826 86 10ms 6 Dec 2022 529th msbranicky 826 86 10ms 23 Jul 2023 529th aalec 826 86 18ms 25 Apr 2024 529th Andrey2001 826 86 10ms 1 Feb 2026 529th JOrE20 826 86 10ms 22 Feb 2026 538th dokutan 826 101 15ms 8 Jun 2024 539th rowan-OzRunways 826 137 213ms 26 Jan 2021 539th kaascevich 826 137 250ms 9 Jul 2025 541st nwellnhof 🇩🇪 825 57 35ms 28 Oct 2021 541st anter69 🇭🇺 825 57 36ms 5 Apr 2022 541st GrayJoKing 🇦🇺 825 57 57ms 30 Nov 2023 541st DialFrost 🇸🇬 825 57 121ms 1 Jun 2024 541st sean-niemann 🇺🇸 825 57 37ms 4 Aug 2025 546th AdrienHache 🇫🇷 825 88 49ms 6 Oct 2024 547th andersk 🇺🇸 825 145 218ms 25 Oct 2022 548th Natanaelel 🇸🇪 824 68 4ms 15 Jan 2024 549th iczelia 🇩🇪 824 83 117ms 19 Oct 2025 550th commandz0 🇺🇸 822 80 423ms 1 Sep 2025 551st h3ra993huskp 🇯🇵 822 149 573ms 30 Nov 2025 552nd dvargas46 🇺🇸 820 74 4ms 25 Feb 2023 553rd SirBogman 🇺🇸 819 69 315ms 2 Jan 2022 554th primo-ppcg 🇹🇭 819 129 2ms 21 Aug 2020 555th emgordon154 819 146 259ms 14 Mar 2025 556th m-tkach 🇺🇦 818 82 12ms 30 Aug 2023 556th DialFrost 🇸🇬 818 82 16ms 6 Nov 2025 558th ovs-code 🇩🇪 818 118 4ms 2 Feb 2023 559th GolfingSuccess 🇬🇷 818 133 211ms 21 Sep 2025 560th Shanethegamer 🇺🇸 818 242 1,426ms 21 Jan 2025 First Prev 481–560 of 1,913 Next Last