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 in Python 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 625th Glinte 677 65 10ms 13 Dec 2023 625th azure-blondon 677 65 16ms 11 May 2024 625th kistlerf 🇨🇭 677 65 16ms 30 May 2025 625th yukii1004 677 65 10ms 25 Sep 2025 645th Threadzless 667 66 9ms 29 Oct 2018 645th patbassing 667 66 10ms 15 Jun 2019 645th kusti8 667 66 10ms 30 Jul 2019 645th GodEmperorCaterpie 667 66 10ms 4 Sep 2019 645th KiwiKoder0123 667 66 10ms 22 Oct 2019 645th DarkTemplar5 667 66 16ms 24 Feb 2020 645th jthomas1294 667 66 11ms 7 May 2020 645th VictorFordham 667 66 10ms 8 Aug 2020 645th the-soph-ia 667 66 10ms 31 Jan 2021 645th ethandhunt 667 66 10ms 21 Jul 2021 645th Y0UR-U5ERNAME 667 66 10ms 5 Sep 2021 645th martinnorling 🇸🇪 667 66 10ms 4 Feb 2022 645th Trunksistor 🇫🇷 667 66 9ms 18 May 2022 645th rowboat1 667 66 16ms 19 Jun 2022 645th Yareeeema 667 66 10ms 6 Jan 2023 645th Skwerl23 667 66 10ms 6 Feb 2023 645th Azearia 667 66 10ms 13 Aug 2023 645th tails618 667 66 10ms 21 Aug 2023 645th ItsEthanDev 667 66 10ms 13 Dec 2023 645th jmjaggi1202 667 66 10ms 13 Dec 2023 645th Ralac07 🇦🇺 667 66 10ms 12 Jun 2024 645th JesseNoEyes 🇺🇸 667 66 9ms 12 Oct 2024 645th Alex-Huggett 🇬🇧 667 66 16ms 23 Oct 2024 645th munchsaga 667 66 9ms 12 Jan 2025 645th CodyKlingler 667 66 10ms 7 Feb 2025 645th 6t41m0ct5 667 66 10ms 14 Apr 2025 645th muser-logiccpu 🇺🇦 667 66 9ms 26 Aug 2025 645th lokeshllkumar 667 66 10ms 26 Sep 2025 673rd mvrkws 657 67 10ms 5 Dec 2018 673rd zuparnowa 657 67 10ms 23 Jan 2019 673rd Edgex42 657 67 10ms 25 May 2019 673rd usnheckler 657 67 10ms 7 Jun 2019 673rd henrytranter 657 67 9ms 20 Sep 2019 673rd simplylu 657 67 10ms 5 Jun 2020 673rd Psirving 657 67 10ms 21 Jul 2020 673rd PyPylia 🇦🇺 657 67 10ms 7 Aug 2020 673rd jameslindesay 657 67 10ms 24 Feb 2021 673rd Larspolo 657 67 10ms 6 Jun 2021 673rd feherd 657 67 10ms 29 Aug 2021 673rd charlieharutaka 657 67 9ms 28 Sep 2021 673rd sbr075 657 67 10ms 7 Dec 2021 673rd brochmann 🇸🇪 657 67 10ms 7 Feb 2022 673rd Marco-perce 657 67 10ms 12 Aug 2022 673rd TimLeffke 657 67 9ms 17 Aug 2022 673rd mdnestor 657 67 11ms 27 Dec 2022 673rd Pimveha 657 67 10ms 12 Jan 2023 673rd UriyaBA 657 67 10ms 20 Mar 2023 673rd A-Dummo 657 67 10ms 28 May 2023 673rd Fanrco 657 67 10ms 31 Aug 2023 673rd epic-programmer-guy 657 67 10ms 20 Dec 2023 673rd ComputerKWasTaken 🇺🇸 657 67 18ms 1 Jun 2024 673rd lhulinsky 657 67 10ms 21 Oct 2024 673rd Naitzirch 🇳🇱 657 67 9ms 3 Jul 2025 673rd katss2 657 67 11ms 14 Aug 2025 673rd TJK-S 657 67 10ms 22 Oct 2025 700th Visckmart 647 68 9ms 22 Jul 2018 700th mfinzi 647 68 10ms 19 Nov 2018 700th EmadAIsmael 647 68 10ms 22 Jan 2019 700th jrburga 647 68 10ms 17 Nov 2019 700th scottJsonar 647 68 10ms 29 Nov 2019 700th Malin001 647 68 10ms 4 Jan 2020 700th theonlytruemathnerd 647 68 10ms 10 Jan 2020 700th mcdowell95 647 68 10ms 1 Apr 2020 700th havardMoe 647 68 10ms 30 Jul 2020 700th achow0 647 68 9ms 3 Aug 2020 700th potato-jackson 647 68 10ms 1 Mar 2021 700th peculiarination 647 68 10ms 20 May 2021 700th orifu 647 68 10ms 25 Jun 2021 700th twocatsinatrenchcoat 647 68 9ms 14 Apr 2022 700th Shiran-Yuan 647 68 10ms 5 Apr 2023 700th SURAJMITTAL 647 68 9ms 19 Dec 2024 700th WillowWispy 647 68 10ms 15 Mar 2025 700th SOONwasTaken 647 68 10ms 19 Mar 2025 700th saturzay 647 68 10ms 22 Aug 2025 700th EthanJantz 647 68 9ms 22 Aug 2025 700th therealnumbers 647 68 9ms 26 Sep 2025 First Prev 641–720 of 924 Next Last
