The Calendar hole will go live in approximately 9 days. Why not try and solve it ahead of time?
Niven Numbers 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 63rd madeforlosers 973 42 8ms 4 Nov 2024 63rd eranws 973 42 9ms 23 Dec 2024 63rd deancureton 973 42 9ms 29 Dec 2024 63rd targrik 973 42 8ms 13 Feb 2025 63rd jakobwitte 973 42 9ms 12 May 2025 63rd fuzzylojik-golf 🇺🇸 973 42 9ms 15 May 2025 63rd qwertyuiop3 🇷🇺 973 42 9ms 4 Jun 2025 63rd a6166231 🇨🇳 973 42 9ms 19 Jun 2025 63rd Protothor 973 42 9ms 30 Jun 2025 63rd TheDrawingCoder-Gamer 973 42 9ms 3 Jul 2025 63rd LordSir101 973 42 9ms 18 Aug 2025 63rd Ultra814 973 42 9ms 22 Aug 2025 63rd Xanderium 973 42 9ms 29 Aug 2025 63rd Yax42 🇫🇷 973 42 9ms 5 Sep 2025 63rd alexsave 973 42 9ms 16 Sep 2025 63rd edsrzf 🇳🇿 973 42 8ms 23 Sep 2025 63rd qpwoeirut 973 42 8ms 14 Oct 2025 63rd luuumine 🇫🇷 973 42 8ms 29 Oct 2025 63rd KasperKivimaeki 🇫🇮 973 42 9ms 1 Nov 2025 63rd Lv0Sys 🇵🇱 973 42 9ms 20 days ago 63rd CornerMercury 🇬🇧 973 42 9ms 15 days ago 63rd albanian-laundromat 973 42 10ms 3 hours ago 183rd primo-ppcg 🇹🇭 971 29 36ms 3 Jan 2020 183rd prplz 🇦🇺 971 29 43ms 5 Jan 2020 183rd JayXon 🇺🇸 971 29 47ms 20 Feb 2021 183rd sisyphus-ppcg 🇦🇺 971 29 42ms 3 Jun 2021 183rd Lydxn 🇨🇦 971 29 36ms 17 Aug 2021 183rd stefangimmillaro 971 29 42ms 21 Aug 2023 183rd orthoplex 🇨🇽 971 29 36ms 4 Oct 2023 183rd radarek 🇵🇱 971 29 43ms 17 Dec 2024 183rd sean-niemann 🇺🇸 971 29 36ms 12 Jun 2025 183rd pardouin 🇫🇷 971 29 35ms 19 Aug 2025 193rd JayXon 🇺🇸 967 28 261ms 29 Oct 2023 193rd Lydxn 🇨🇦 967 28 255ms 29 Oct 2023 193rd sisyphus-ppcg 🇦🇺 967 28 243ms 29 Oct 2023 193rd Shanethegamer 🇺🇸 967 28 245ms 29 Oct 2023 193rd Steffan153 🇫🇮 967 28 248ms 29 Oct 2023 193rd prplz 🇦🇺 967 28 230ms 29 Oct 2023 193rd sean-niemann 🇺🇸 967 28 240ms 25 Mar 2025 200th nwellnhof 🇩🇪 964 26 35ms 2 Sep 2021 201st primo-ppcg 🇹🇭 963 28 2ms 14 Mar 2021 201st GrayJoKing 🇦🇺 963 28 2ms 15 Apr 2021 201st sisyphus-ppcg 🇦🇺 963 28 2ms 16 Apr 2021 201st Lydxn 🇨🇦 963 28 2ms 8 May 2022 201st Steffan153 🇫🇮 963 28 2ms 25 Apr 2023 201st o0lit3 🇺🇸 963 28 2ms 12 Jun 2023 201st sean-niemann 🇺🇸 963 28 2ms 21 May 2025 201st fuzzylojik-golf 🇺🇸 963 28 3ms 10 Jul 2025 209th tjtnorton 960 45 9ms 29 Nov 2018 209th TFeld00 🇩🇰 960 45 9ms 25 Jun 2019 209th hoodadam 960 45 9ms 19 Sep 2019 209th marcin7Cd 960 45 9ms 15 Mar 2020 209th retrohun 960 45 10ms 4 May 2020 209th dim-an 960 45 9ms 7 Dec 2020 209th nwellnhof 🇩🇪 960 45 9ms 31 Dec 2020 209th neihousaigaai 960 45 9ms 22 Mar 2021 209th NewDefectus 🇮🇱 960 45 9ms 8 May 2021 209th GrayJoKing 🇦🇺 960 45 28ms 8 Sep 2021 209th annaproxy 960 45 9ms 24 Dec 2021 209th inventshah 960 45 9ms 27 Apr 2022 209th jared-hughes 960 45 9ms 13 Aug 2022 209th stefangimmillaro 960 45 9ms 30 Sep 2022 209th MeWhenI 🇻🇦 960 45 9ms 10 Oct 2022 209th bricknellj 960 45 9ms 21 Oct 2022 209th Shanethegamer 🇺🇸 960 45 9ms 8 Mar 2023 209th SirBogman 🇺🇸 960 45 9ms 10 Jan 2024 209th Grrisly 960 45 9ms 25 Mar 2024 209th duckyluuk 🇳🇱 960 45 9ms 28 Mar 2024 209th HETHAT 🇩🇿 960 45 9ms 11 Apr 2024 209th Yewzir 🇧🇪 960 45 11ms 4 Jun 2024 209th emgordon154 960 45 9ms 7 Aug 2024 209th alemelis 960 45 9ms 26 Sep 2024 209th nullie 960 45 10ms 17 Dec 2024 209th Bulmenisaurus 960 45 9ms 6 Feb 2025 209th Mukundan314 960 45 9ms 25 Apr 2025 209th KasperKivimaeki 🇫🇮 960 45 10ms 30 Jun 2025 209th wuduculfre 960 45 9ms 22 Jul 2025 209th edsrzf 🇳🇿 960 45 9ms 26 Jul 2025 209th albanian-laundromat 960 45 10ms 19 Aug 2025 209th KatieLG 🇬🇧 960 45 9ms 3 Oct 2025 First Prev 161–240 of 4,114 Next Last