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?
Niven Numbers (Long) 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 639th pardouin 🇫🇷 908 79 28ms 21 Oct 2024 639th DialFrost 🇸🇬 908 79 28ms 11 Apr 2025 639th sean-niemann 🇺🇸 908 79 27ms 19 May 2025 639th fuzzylojik-golf 🇺🇸 908 79 27ms 26 Dec 2025 645th Sp3000 🇦🇺 906 54 17ms 8 Aug 2022 645th GolfingSuccess 🇬🇷 906 54 17ms 8 Aug 2022 645th 051 🇸🇬 906 54 18ms 8 Aug 2022 645th CubeyTheCube 906 54 17ms 8 Aug 2022 645th ZakkkkAttackkkk 🇵🇭 906 54 16ms 8 Aug 2022 645th jared-hughes 906 54 18ms 9 Aug 2022 645th annaproxy 906 54 18ms 9 Aug 2022 645th BlankSpruce 906 54 17ms 17 Aug 2022 645th prplz 🇦🇺 906 54 17ms 19 Aug 2022 645th bob-th 906 54 18ms 22 Aug 2022 645th TFeld00 🇩🇰 906 54 17ms 3 Oct 2022 645th bricknellj 906 54 16ms 31 Oct 2022 645th thehylian 906 54 16ms 27 Dec 2022 645th janbehrens 🇩🇪 906 54 17ms 11 Jul 2023 645th AlexanderFair 906 54 17ms 12 Jul 2023 645th fkantelberg 906 54 16ms 18 Jul 2023 645th FlorianCassayre 🇫🇷 906 54 17ms 28 Sep 2023 645th ndren 906 54 17ms 9 Oct 2023 645th neel11235813 906 54 18ms 20 Oct 2023 645th ridingqwerty 🇺🇸 906 54 17ms 22 Dec 2023 645th bzijlema 🇳🇱 906 54 16ms 12 Jan 2024 645th jhu04 906 54 18ms 18 Jan 2024 645th duckyluuk 🇳🇱 906 54 17ms 24 Jan 2024 645th 5cw 🇺🇸 906 54 17ms 5 Mar 2024 645th Lewenhaupt 906 54 18ms 22 Mar 2024 645th Grrisly 906 54 16ms 25 Mar 2024 645th Yewzir 🇧🇪 906 54 16ms 4 Jun 2024 645th b-illy 🇬🇧 906 54 16ms 8 Aug 2024 645th quarl 906 54 16ms 13 Nov 2024 645th lifthrasiir 🇰🇷 906 54 16ms 13 Nov 2024 645th ryyyn 🇺🇸 906 54 17ms 6 Jan 2025 645th wen1now 906 54 17ms 19 Jan 2025 645th plcc0 906 54 17ms 20 Feb 2025 645th Pyroan 906 54 16ms 3 Mar 2025 645th Languag3 906 54 17ms 6 Mar 2025 645th emgordon154 906 54 17ms 13 Apr 2025 645th andrewjc2000 906 54 17ms 15 Apr 2025 645th keelimeguy 🇺🇸 906 54 17ms 6 May 2025 645th jipsong 🇩🇪 906 54 17ms 20 Jun 2025 645th KasperKivimaeki 🇫🇮 906 54 16ms 30 Jun 2025 645th wuduculfre 906 54 16ms 21 Jul 2025 645th albanian-laundromat 906 54 18ms 18 Aug 2025 645th YAJUE114514 906 54 17ms 24 Aug 2025 645th davecame 906 54 17ms 19 Sep 2025 645th Babafaba 906 54 16ms 17 Oct 2025 645th luuumine 🇫🇷 906 54 17ms 20 Oct 2025 645th j-zhang43 906 54 17ms 17 Nov 2025 645th solisolu 906 54 17ms 25 Nov 2025 645th tomh1012 906 54 18ms 3 Dec 2025 645th Lv0Sys 🇵🇱 906 54 17ms 7 Dec 2025 645th edsrzf 🇳🇿 906 54 17ms 25 Dec 2025 645th FoxInTheClouds 906 54 16ms 8 Feb 2026 645th error256 906 54 13ms 12 days ago 698th Lydxn 🇨🇦 906 62 141ms 9 Aug 2022 698th Shanethegamer 🇺🇸 906 62 130ms 9 Aug 2022 698th Steffan153 🇫🇮 906 62 136ms 6 Dec 2022 698th jipsong 🇩🇪 906 62 140ms 6 May 2025 702nd Lydxn 🇨🇦 906 75 4ms 15 Jul 2023 702nd Steffan153 🇫🇮 906 75 4ms 22 Jul 2023 702nd GrayJoKing 🇦🇺 906 75 4ms 26 Jul 2023 702nd typeswitch-dev 🇵🇹 906 75 4ms 17 Aug 2023 702nd sean-niemann 🇺🇸 906 75 4ms 11 Jun 2025 702nd fuzzylojik-golf 🇺🇸 906 75 4ms 18 Sep 2025 708th JayXon 🇺🇸 906 97 24ms 10 Nov 2022 708th Lydxn 🇨🇦 906 97 24ms 11 Nov 2022 708th Steffan153 🇫🇮 906 97 25ms 28 Jul 2024 708th sean-niemann 🇺🇸 906 97 24ms 1 Aug 2024 708th DialFrost 🇸🇬 906 97 27ms 11 Apr 2025 708th fuzzylojik-golf 🇺🇸 906 97 26ms 12 Aug 2025 714th ovs-code 🇩🇪 905 65 3ms 4 Nov 2023 714th xsot 🇸🇬 905 65 3ms 12 Jun 2024 716th sisyphus-ppcg 🇦🇺 904 63 140ms 8 Aug 2022 716th GrayJoKing 🇦🇺 904 63 139ms 14 Aug 2022 716th primo-ppcg 🇹🇭 904 63 143ms 4 Sep 2022 716th MeWhenI 🇻🇦 904 63 139ms 21 Feb 2023 716th Yewzir 🇧🇪 904 63 147ms 10 Apr 2024 First Prev 641–720 of 2,559 Next Last