The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 40 mins. Why not try and solve them ahead of time?
Highly Composite 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 156th HumanoidCPU 0 401 15ms 23 Feb 2025 156th Shanethegamer 🇺🇸 0 401 61ms 18 Apr 2025 156th Shanethegamer 🇺🇸 0 401 13ms 18 Apr 2025 156th Shanethegamer 🇺🇸 0 401 163ms 18 Apr 2025 156th KatieLG 🇬🇧 0 401 128ms 27 Apr 2025 156th KatieLG 🇬🇧 0 401 41ms 27 Apr 2025 156th Shanethegamer 🇺🇸 0 401 2ms 2 May 2025 156th Shanethegamer 🇺🇸 0 401 144ms 2 Jul 2025 156th HumanoidCPU 0 401 64ms 18 Aug 2025 156th HumanoidCPU 0 401 172ms 18 Aug 2025 156th HumanoidCPU 0 401 2ms 18 Aug 2025 156th HumanoidCPU 0 401 330ms 18 Aug 2025 173rd Shanethegamer 🇺🇸 0 402 844ms 18 Apr 2025 173rd KatieLG 🇬🇧 0 402 1,009ms 27 Apr 2025 173rd HumanoidCPU 0 402 847ms 18 Aug 2025 173rd KatieLG 🇬🇧 0 402 1ms 21 Nov 2025 177th Shanethegamer 🇺🇸 0 403 9ms 27 Dec 2024 177th HumanoidCPU 0 403 9ms 11 Jan 2025 177th KatieLG 🇬🇧 0 403 33ms 27 Apr 2025 177th KatieLG-Transpiler 🇬🇧 0 403 1ms 9 Jan 2026 177th KatieLG-Transpiler 🇬🇧 0 403 1,244ms 9 Jan 2026 182nd Shanethegamer 🇺🇸 0 404 474ms 25 Dec 2024 182nd Shanethegamer 🇺🇸 0 404 10ms 27 Dec 2024 182nd HumanoidCPU 0 404 10ms 11 Jan 2025 182nd HumanoidCPU 0 404 446ms 11 Jan 2025 182nd Shanethegamer 🇺🇸 0 404 1ms 18 Apr 2025 182nd Shanethegamer 🇺🇸 0 404 1,065ms 18 Apr 2025 182nd HumanoidCPU 0 404 1ms 18 Aug 2025 182nd HumanoidCPU 0 404 1,047ms 18 Aug 2025 182nd KasperKivimaeki 🇫🇮 0 404 1,946ms 2 Oct 2025 182nd luuumine 🇫🇷 0 404 9ms 13 Oct 2025 182nd kurkale6ka 0 404 2ms 15 Dec 2025 182nd HumanoidCPU 0 404 1ms 6 Feb 2026 182nd Shanethegamer 🇺🇸 0 404 1ms 7 Feb 2026 195th Shanethegamer 🇺🇸 0 405 128ms 25 Dec 2024 195th Shanethegamer 🇺🇸 0 405 22ms 27 Dec 2024 195th HumanoidCPU 0 405 22ms 11 Jan 2025 195th HumanoidCPU 0 405 52ms 28 Jan 2025 195th HumanoidCPU 0 405 128ms 28 Jan 2025 195th KatieLG 🇬🇧 0 405 130ms 27 Apr 2025 195th KatieLG 🇬🇧 0 405 22ms 27 Apr 2025 195th KatieLG-Transpiler 🇬🇧 0 405 22ms 9 Jan 2026 203rd Shanethegamer 🇺🇸 0 406 81ms 27 Dec 2024 203rd HumanoidCPU 0 406 66ms 11 Jan 2025 203rd Shanethegamer 🇺🇸 0 406 7ms 18 Apr 2025 203rd HumanoidCPU 0 406 7ms 18 Aug 2025 207th Shanethegamer 🇺🇸 0 407 2ms 27 Dec 2024 207th HumanoidCPU 0 407 2ms 11 Jan 2025 207th KatieLG-Transpiler 🇬🇧 0 407 9ms 9 Jan 2026 207th KatieLG-Transpiler 🇬🇧 0 407 35ms 9 Jan 2026 211th Shanethegamer 🇺🇸 0 408 1ms 25 Dec 2024 211th HumanoidCPU 0 408 1ms 11 Jan 2025 213th Shanethegamer 🇺🇸 0 409 58ms 18 Apr 2025 213th HumanoidCPU 0 409 58ms 18 Aug 2025 213th KatieLG-Transpiler 🇬🇧 0 409 127ms 9 Jan 2026 216th Shanethegamer 🇺🇸 0 410 382ms 25 Dec 2024 216th HumanoidCPU 0 410 382ms 28 Jan 2025 216th KatieLG 🇬🇧 0 410 366ms 27 Apr 2025 219th KatieLG-Transpiler 🇬🇧 0 411 2ms 9 Jan 2026 220th Shanethegamer 🇺🇸 0 412 112ms 27 Dec 2024 220th HumanoidCPU 0 412 120ms 11 Jan 2025 220th Shanethegamer 🇺🇸 0 412 110ms 4 Dec 2025 220th Shanethegamer 🇺🇸 0 412 3ms 25 Dec 2025 224th Shanethegamer 🇺🇸 0 413 114ms 25 Dec 2024 224th KatieLG 🇬🇧 0 413 114ms 27 Apr 2025 224th Shanethegamer 🇺🇸 0 413 50ms 6 May 2025 224th HumanoidCPU 0 413 107ms 9 Nov 2025 228th HumanoidCPU 0 414 117ms 18 Aug 2025 229th KatieLG 🇬🇧 0 415 52ms 27 Apr 2025 229th KatieLG-Transpiler 🇬🇧 0 415 53ms 9 Jan 2026 231st cthierfelder 🇲🇨 0 417 10ms 6 Sep 2025 232nd Shanethegamer 🇺🇸 0 418 63ms 3 Jul 2025 233rd HumanoidCPU 0 420 64ms 18 Aug 2025 234th Shanethegamer 🇺🇸 0 422 418ms 25 Sep 2025 234th HumanoidCPU 0 422 453ms 8 Nov 2025 236th Shanethegamer 🇺🇸 0 423 468ms 25 Dec 2024 237th HumanoidCPU 0 424 474ms 11 Jan 2025 237th KatieLG 🇬🇧 0 424 43ms 27 Apr 2025 239th Shanethegamer 🇺🇸 0 427 54ms 25 Dec 2024 239th HumanoidCPU 0 427 67ms 28 Nov 2025 First Prev 161–240 of 378 Next Last
