The Calendar hole will go live in approximately 12 days. Why not try and solve it ahead of time?
Niven Numbers (Long) in all languages in chars. 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 Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz 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 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 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz 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 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 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 236th fuzzylojik-golf 🇺🇸 929 63 4ms 14 Jul 2025 242nd MeWhenI 🇻🇦 927 34 989ms 8 Aug 2022 242nd SirBogman 🇺🇸 927 34 843ms 10 Aug 2022 242nd anter69 🇭🇺 927 34 904ms 24 Feb 2023 242nd FlyingPenguin223 927 34 970ms 24 Oct 2024 246th MaxCastella 🇫🇷 927 39 4,448ms 24 Oct 2023 246th Feniske 🇫🇷 927 39 4,511ms 24 Oct 2023 246th Steffan153 🇫🇮 927 39 3,903ms 9 Aug 2024 246th IISResetMe 927 39 4,437ms 8 Apr 2025 246th sean-niemann 🇺🇸 927 39 3,881ms 11 Apr 2025 246th bitsandbeyond 🇳🇱 927 39 4,213ms 25 Oct 2025 252nd Lydxn 🇨🇦 927 48 4ms 30 Oct 2022 252nd btnlq 927 48 4ms 5 Nov 2022 252nd clockworknazo 927 48 5ms 18 Nov 2022 252nd primo-ppcg 🇹🇭 927 48 5ms 19 Nov 2022 252nd sisyphus-ppcg 🇦🇺 927 48 3ms 22 Feb 2023 252nd xsot 🇸🇬 927 48 4ms 16 May 2023 252nd fuzzylojik-golf 🇺🇸 927 48 4ms 12 Aug 2025 252nd sean-niemann 🇺🇸 927 48 4ms 27 Aug 2025 252nd DialFrost 🇸🇬 927 48 7ms 16 hours ago 261st Lydxn 🇨🇦 927 62 190ms 8 Aug 2022 261st lynn 927 62 184ms 9 Aug 2022 261st HPWiz 🇳🇿 927 62 189ms 10 Aug 2022 261st JayXon 🇺🇸 927 62 180ms 10 Aug 2022 261st sean-niemann 🇺🇸 927 62 179ms 1 Jul 2023 261st Sakisan 🇧🇪 927 62 190ms 15 Jul 2023 261st Andriamanitra 🇫🇮 927 62 186ms 28 Jul 2023 261st alomiF 927 62 196ms 5 Oct 2023 261st btnlq 927 62 190ms 14 Oct 2023 261st ovs-code 🇩🇪 927 62 183ms 8 Feb 2024 261st Steffan153 🇫🇮 927 62 185ms 24 Feb 2024 261st DialFrost 🇸🇬 927 62 189ms 5 Aug 2024 261st stackofbears 927 62 181ms 20 Jan 2025 261st YAJUE114514 927 62 190ms 29 Jul 2025 261st fuzzylojik-golf 🇺🇸 927 62 182ms 15 Sep 2025 276th GrayJoKing 🇦🇺 925 43 19ms 18 Aug 2024 276th btnlq 925 43 20ms 23 Aug 2024 276th ovs-code 🇩🇪 925 43 20ms 30 Oct 2024 276th emgordon154 925 43 24ms 6 Jun 2025 280th JayXon 🇺🇸 925 49 141ms 4 Aug 2024 280th sean-niemann 🇺🇸 925 49 137ms 7 Aug 2024 282nd sisyphus-ppcg 🇦🇺 924 50 106ms 14 Dec 2022 282nd Lydxn 🇨🇦 924 50 108ms 15 Dec 2022 282nd DialFrost 🇸🇬 924 50 100ms 2 Jul 2025 282nd sean-niemann 🇺🇸 924 50 121ms 3 Jul 2025 282nd ovs-code 🇩🇪 924 50 99ms 11 days ago 287th andersk 🇺🇸 924 77 123ms 7 Nov 2022 287th JayXon 🇺🇸 924 77 120ms 10 Nov 2022 287th Lydxn 🇨🇦 924 77 120ms 11 Nov 2022 287th sean-niemann 🇺🇸 924 77 127ms 1 Aug 2024 287th pardouin 🇫🇷 924 77 129ms 21 Oct 2024 287th DialFrost 🇸🇬 924 77 131ms 11 Apr 2025 287th acotis 924 77 125ms 10 Jun 2025 287th fuzzylojik-golf 🇺🇸 924 77 121ms 13 Jul 2025 287th kumavale 924 77 123ms 7 Sep 2025 296th sisyphus-ppcg 🇦🇺 923 49 343ms 16 Jan 2024 296th m-tkach 🇺🇦 923 49 364ms 20 Jan 2024 296th lynn 923 49 365ms 17 Feb 2024 296th sean-niemann 🇺🇸 923 49 365ms 21 Jan 2025 296th fuzzylojik-golf 🇺🇸 923 49 344ms 10 Sep 2025 301st GrayJoKing 🇦🇺 923 52 37ms 8 Aug 2022 301st KrausRaus 🇺🇸 923 52 34ms 8 Aug 2022 301st inventshah 923 52 34ms 8 Aug 2022 301st CubeyTheCube 923 52 35ms 8 Aug 2022 301st akshatj27 🇦🇶 923 52 33ms 8 Aug 2022 301st Natanaelel 🇸🇪 923 52 12ms 9 Aug 2022 301st NewDefectus 🇮🇱 923 52 33ms 9 Aug 2022 301st itsh01 923 52 33ms 10 Aug 2022 301st didion0 🇺🇸 923 52 34ms 10 Aug 2022 301st jared-hughes 923 52 33ms 22 Sep 2022 301st ovs-code 🇩🇪 923 52 35ms 12 Jan 2023 301st DialFrost 🇸🇬 923 52 34ms 27 Jan 2023 301st crazyrussianboris 🇷🇺 923 52 35ms 22 Feb 2023 301st voytxt 🇨🇿 923 52 34ms 10 May 2023 301st raszpi 🇭🇺 923 52 34ms 3 Sep 2023 301st Argeento 🇵🇱 923 52 34ms 9 Sep 2023 301st weliveinhell 🇭🇹 923 52 11ms 27 Sep 2023 301st stefangimmillaro 923 52 33ms 29 Sep 2023 301st m-tkach 🇺🇦 923 52 33ms 29 Sep 2023 301st Davr1 🇨🇿 923 52 33ms 14 Oct 2023 First Prev 241–320 of 2,465 Next Last