The Calendar hole will go live in approximately 5 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 720th sean-niemann 🇺🇸 885 79 445ms 26 Sep 2025 720th pardouin 🇫🇷 885 79 429ms 26 Sep 2025 720th fuzzylojik-golf 🇺🇸 885 79 387ms 26 Sep 2025 720th Yewzir 🇧🇪 885 79 461ms 2 Oct 2025 720th m-tkach 🇺🇦 885 79 438ms 3 Oct 2025 720th Yax42 🇫🇷 885 79 350ms 5 Oct 2025 720th namelessiw 885 79 387ms 6 Oct 2025 720th b-illy 🇬🇧 885 79 543ms 18 days ago 729th Steffan153 🇫🇮 884 45 16ms 11 Aug 2024 729th sisyphus-ppcg 🇦🇺 884 45 24ms 12 Aug 2024 729th Shanethegamer 🇺🇸 884 45 16ms 14 Aug 2024 729th DialFrost 🇸🇬 884 45 16ms 17 Aug 2024 733rd dokutan 884 76 24ms 1 Jul 2024 733rd zacjl 884 76 22ms 19 Jan 2025 735th GrayJoKing 🇦🇺 883 99 24ms 14 Aug 2022 735th primo-ppcg 🇹🇭 883 99 25ms 4 Sep 2022 735th m-tkach 🇺🇦 883 99 25ms 2 Jun 2023 738th SirBogman 🇺🇸 882 41 4,112ms 6 Jan 2024 738th juliansiebert 🇩🇪 882 41 4,044ms 2 Mar 2025 740th MeWhenI 🇻🇦 881 70 93ms 22 Mar 2024 741st janbehrens 🇩🇪 880 44 400ms 8 Aug 2022 741st MeWhenI 🇻🇦 880 44 346ms 25 Nov 2022 743rd Steffan153 🇫🇮 880 101 270ms 17 Dec 2022 743rd MeWhenI 🇻🇦 880 101 268ms 21 Feb 2023 743rd stefangimmillaro 880 101 278ms 14 Jun 2023 743rd sean-niemann 🇺🇸 880 101 258ms 17 Jun 2023 743rd Yewzir 🇧🇪 880 101 271ms 10 Apr 2024 743rd pardouin 🇫🇷 880 101 266ms 20 Oct 2024 743rd fuzzylojik-golf 🇺🇸 880 101 268ms 15 Jul 2025 743rd b-illy 🇬🇧 880 101 255ms 8 days ago 751st pardouin 🇫🇷 879 86 62ms 21 Oct 2024 752nd AlephSquirrel 878 88 96ms 31 Jan 2025 752nd DialFrost 🇸🇬 878 88 112ms 14 Apr 2025 752nd edsrzf 🇳🇿 878 88 109ms 26 days ago 752nd snoozingnewt 🇨🇦 878 88 100ms 25 days ago 752nd pardouin 🇫🇷 878 88 99ms 22 days ago 757th canissimia 🇦🇶 878 218 7ms 21 Aug 2022 758th primo-ppcg 🇹🇭 876 94 17ms 4 Sep 2022 758th Steffan153 🇫🇮 876 94 14ms 28 Jul 2024 758th pardouin 🇫🇷 876 94 15ms 21 Oct 2024 761st dokutan 875 36 1,011ms 30 Apr 2024 762nd sisyphus-ppcg 🇦🇺 875 69 98ms 14 Oct 2022 762nd Steffan153 🇫🇮 875 69 99ms 17 Nov 2022 762nd sean-niemann 🇺🇸 875 69 98ms 11 Apr 2023 762nd m-tkach 🇺🇦 875 69 99ms 2 Jun 2023 762nd stefangimmillaro 875 69 95ms 14 Jun 2023 762nd Yewzir 🇧🇪 875 69 102ms 10 Apr 2024 762nd pardouin 🇫🇷 875 69 105ms 21 Oct 2024 762nd DialFrost 🇸🇬 875 69 104ms 11 Apr 2025 762nd fuzzylojik-golf 🇺🇸 875 69 105ms 28 Aug 2025 771st DialFrost 🇸🇬 874 63 3ms 11 Apr 2025 771st MeWhenI 🇻🇦 874 63 3ms 39 hours ago 773rd pardouin 🇫🇷 874 67 2ms 21 Oct 2024 774th nwellnhof 🇩🇪 874 80 504ms 25 Sep 2025 774th stefangimmillaro 874 80 583ms 6 Oct 2025 774th sisyphus-ppcg 🇦🇺 874 80 464ms 25 Nov 2025 774th CaedenHarper 🇨🇦 874 80 570ms 17 days ago 774th snoozingnewt 🇨🇦 874 80 334ms 15 days ago 779th pardouin 🇫🇷 874 100 25ms 21 Oct 2024 780th GolfingSuccess 🇬🇷 873 26 3ms 9 Feb 2023 780th Natanaelel 🇸🇪 873 26 3ms 18 Nov 2023 780th akamayu-ouo 🇹🇼 873 26 3ms 30 Jul 2024 780th 4hg 🇺🇸 873 26 3ms 9 Sep 2024 780th CornerMercury 🇬🇧 873 26 3ms 18 days ago 785th BambooleanLogic 🇸🇪 873 55 11ms 22 Aug 2022 785th Mazn3k 873 55 33ms 14 Feb 2023 785th jbt 873 55 13ms 28 Dec 2023 785th xyangst 873 55 13ms 7 Oct 2024 785th tomh1012 873 55 11ms 23 days ago 790th DialFrost 🇸🇬 873 124 468ms 11 Apr 2025 791st primo-ppcg 🇹🇭 873 184 54ms 13 Aug 2025 792nd 4hg 🇺🇸 872 27 173ms 9 Feb 2023 793rd DialFrost 🇸🇬 872 52 226ms 4 Aug 2024 793rd pardouin 🇫🇷 872 52 136ms 28 Feb 2025 795th MeWhenI 🇻🇦 872 77 21ms 9 May 2024 796th canissimia 🇦🇶 872 149 3,145ms 23 Jul 2023 797th guilhem-roy 🇫🇷 871 56 15ms 8 Aug 2022 797th btjones0 871 56 16ms 30 Aug 2022 797th jfallon1997 871 56 16ms 6 Sep 2022 797th suwat513 871 56 19ms 24 Sep 2022 First Prev 721–800 of 2,469 Next Last