The Calendar hole will go live in approximately 6 days. Why not try and solve it 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 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 Bytes Time Submitted 719th Lydxn 🇨🇦 900 77 21ms 21 Dec 2023 719th kg583 🇺🇸 900 77 19ms 31 Jul 2025 723rd DialFrost 🇸🇬 900 92 17ms 14 Apr 2025 723rd UnderKoen 🇳🇱 900 92 17ms 15 Apr 2025 725th primo-ppcg 🇹🇭 899 64 40ms 4 Sep 2022 726th sisyphus-ppcg 🇦🇺 898 45 1,956ms 2 Nov 2023 727th yzhs 🇩🇪 895 41 40ms 21 Jun 2023 727th adoxography 895 41 43ms 19 Nov 2023 727th Ralac07 🇦🇺 895 41 50ms 13 Jun 2024 730th JayXon 🇺🇸 895 53 144ms 5 Aug 2024 730th Lydxn 🇨🇦 895 53 135ms 6 Aug 2024 730th emgordon154 895 53 135ms 17 Nov 2024 733rd ovs-code 🇩🇪 894 76 4ms 15 Jul 2023 734th GrayJoKing 🇦🇺 894 80 27ms 2 Jan 2023 734th MeWhenI 🇻🇦 894 80 27ms 21 Feb 2023 734th m-tkach 🇺🇦 894 80 27ms 2 Jun 2023 734th lynn 894 80 27ms 16 Jul 2023 734th Yewzir 🇧🇪 894 80 27ms 10 Apr 2024 739th lyphyser 893 45 50ms 14 Nov 2023 739th Steffan153 🇫🇮 893 45 16ms 11 Aug 2024 739th sisyphus-ppcg 🇦🇺 893 45 24ms 12 Aug 2024 739th Shanethegamer 🇺🇸 893 45 16ms 14 Aug 2024 739th DialFrost 🇸🇬 893 45 16ms 17 Aug 2024 744th DialFrost 🇸🇬 893 52 363ms 15 Jan 2024 744th prplz 🇦🇺 893 52 360ms 15 Jan 2024 744th Yewzir 🇧🇪 893 52 378ms 4 Jun 2024 744th dokutan 893 52 371ms 28 Sep 2024 744th lifthrasiir 🇰🇷 893 52 350ms 2 Dec 2024 744th albanian-laundromat 893 52 352ms 25 Aug 2025 750th Maznek 893 54 34ms 22 Jun 2023 751st ovs-code 🇩🇪 893 56 294ms 19 Nov 2025 752nd pardouin 🇫🇷 893 86 62ms 21 Oct 2024 752nd MeWhenI 🇻🇦 893 86 46ms 11 Feb 2025 754th Waffle3z 892 62 3ms 8 Aug 2022 754th GrayJoKing 🇦🇺 892 62 3ms 13 Aug 2022 754th jared-hughes 892 62 3ms 13 Aug 2022 754th primo-ppcg 🇹🇭 892 62 3ms 4 Sep 2022 754th sean-niemann 🇺🇸 892 62 3ms 11 Apr 2023 754th pardouin 🇫🇷 892 62 4ms 21 Oct 2024 754th fuzzylojik-golf 🇺🇸 892 62 3ms 3 Jul 2025 761st DialFrost 🇸🇬 892 63 99ms 15 Nov 2024 761st sean-niemann 🇺🇸 892 63 128ms 18 Apr 2025 763rd fuzzylojik-golf 🇺🇸 891 53 7ms 10 Sep 2025 763rd targrik 891 53 8ms 27 Nov 2025 763rd KasperKivimaeki 🇫🇮 891 53 27ms 15 days ago 766th GrayJoKing 🇦🇺 891 66 3ms 14 Aug 2022 766th primo-ppcg 🇹🇭 891 66 3ms 4 Sep 2022 766th inventshah 891 66 4ms 26 Jan 2023 766th m-tkach 🇺🇦 891 66 3ms 2 Jun 2023 766th b-illy 🇬🇧 891 66 3ms 10 days ago 771st m-tkach 🇺🇦 890 93 16ms 2 Jun 2023 771st Lydxn 🇨🇦 890 93 17ms 19 Jul 2023 773rd SirBogman 🇺🇸 889 41 4,112ms 6 Jan 2024 773rd juliansiebert 🇩🇪 889 41 4,044ms 2 Mar 2025 775th SirBogman 🇺🇸 889 55 16ms 8 Aug 2022 775th RDShah 889 55 16ms 9 Aug 2022 775th OllieBoyne 🇬🇧 889 55 15ms 12 Aug 2022 775th TobyBoyne 🇬🇧 889 55 15ms 12 Aug 2022 775th dzshn 889 55 19ms 17 Aug 2022 775th HETHAT 🇩🇿 889 55 16ms 18 Aug 2022 775th Fishron 889 55 19ms 29 Sep 2022 775th jakobkordez 🇸🇮 889 55 19ms 15 Nov 2022 775th CheeseCake628 🇳🇴 889 55 17ms 19 Mar 2023 775th 4ndyJ 🇬🇧 889 55 17ms 20 Mar 2023 775th InigoK 🇺🇸 889 55 18ms 25 Apr 2023 775th 2011-Chan-Ethan 889 55 16ms 12 Jul 2023 775th Andriamanitra 🇫🇮 889 55 16ms 20 Jul 2023 775th namelessiw 889 55 16ms 5 Mar 2024 775th jtaxen 889 55 18ms 26 Mar 2024 775th rollershutter 889 55 16ms 4 Jul 2024 775th 5quiwyrm 889 55 16ms 10 Dec 2024 775th souta-1326 889 55 16ms 25 Mar 2025 775th wobblybits 889 55 16ms 23 Aug 2025 775th Emutis 🇱🇹 889 55 16ms 16 Sep 2025 795th error256 888 78 20ms 24 Jul 2025 796th janbehrens 🇩🇪 887 44 400ms 8 Aug 2022 796th MeWhenI 🇻🇦 887 44 346ms 25 Nov 2022 798th MeWhenI 🇻🇦 886 73 93ms 22 Mar 2024 799th GrayJoKing 🇦🇺 886 99 24ms 14 Aug 2022 799th primo-ppcg 🇹🇭 886 99 25ms 4 Sep 2022 First Prev 721–800 of 2,483 Next Last