The Calendar hole will go live in approximately 13 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 718th GalladeGuy 🇺🇸 926 47 1ms 15 Dec 2024 718th TheDrawingCoder-Gamer 926 47 1ms 3 Jul 2025 718th edsrzf 🇳🇿 926 47 2ms 20 Aug 2025 718th snoozingnewt 🇨🇦 926 47 1ms 14 days ago 725th ovs-code 🇩🇪 926 50 2ms 9 Sep 2022 725th Shanethegamer 🇺🇸 926 50 2ms 9 Sep 2022 725th Lydxn 🇨🇦 926 50 2ms 9 Sep 2022 725th MeWhenI 🇻🇦 926 50 2ms 10 Sep 2022 725th JayXon 🇺🇸 926 50 2ms 10 Sep 2022 725th sean-niemann 🇺🇸 926 50 2ms 10 Sep 2022 725th GrayJoKing 🇦🇺 926 50 2ms 11 Sep 2022 725th btnlq 926 50 2ms 13 Sep 2022 725th clockworknazo 926 50 2ms 12 Oct 2022 725th prplz 🇦🇺 926 50 2ms 30 Nov 2022 725th Steffan153 🇫🇮 926 50 2ms 30 Nov 2022 725th DialFrost 🇸🇬 926 50 2ms 26 Jan 2023 725th inventshah 926 50 3ms 26 Jan 2023 725th m-tkach 🇺🇦 926 50 2ms 2 Jun 2023 725th sisyphus-ppcg 🇦🇺 926 50 2ms 29 Oct 2023 725th Betuaredead 926 50 2ms 13 Nov 2023 725th Yewzir 🇧🇪 926 50 2ms 14 Nov 2023 725th pardouin 🇫🇷 926 50 2ms 22 Aug 2024 725th fuzzylojik-golf 🇺🇸 926 50 2ms 18 Jul 2025 725th GolfingSuccess 🇬🇷 926 50 2ms 10 Aug 2025 725th albanian-laundromat 926 50 2ms 16 Sep 2025 725th snoozingnewt 🇨🇦 926 50 2ms 8 days ago 747th cure-honey 🇯🇵 926 62 116ms 29 Jun 2021 747th nipzu 926 62 118ms 13 Jan 2022 747th Creative0708 🇨🇦 926 62 114ms 16 Dec 2023 747th okaponta 926 62 122ms 11 Jan 2024 747th dokutan 926 62 121ms 27 Mar 2024 747th ian-h-chamberlain 🇺🇸 926 62 133ms 3 Nov 2025 747th luuumine 🇫🇷 926 62 113ms 11 Nov 2025 754th Lydxn 🇨🇦 924 40 10ms 4 Jan 2022 754th saito-ta 🇯🇵 924 40 3ms 9 Nov 2023 756th GrayJoKing 🇦🇺 924 46 3ms 29 Sep 2022 756th Lydxn 🇨🇦 924 46 3ms 29 Sep 2022 756th ovs-code 🇩🇪 924 46 3ms 29 Sep 2022 756th clockworknazo 924 46 3ms 30 Sep 2022 756th DialFrost 🇸🇬 924 46 3ms 29 Jan 2023 756th Steffan153 🇫🇮 924 46 3ms 3 Feb 2023 756th sisyphus-ppcg 🇦🇺 924 46 3ms 6 Feb 2023 756th prplz 🇦🇺 924 46 3ms 16 May 2023 756th sean-niemann 🇺🇸 924 46 3ms 23 Oct 2023 756th xsot 🇸🇬 924 46 3ms 8 Feb 2024 756th Yewzir 🇧🇪 924 46 3ms 2 Mar 2024 756th pardouin 🇫🇷 924 46 3ms 22 Aug 2024 756th edsrzf 🇳🇿 924 46 3ms 8 Nov 2025 769th MeWhenI 🇻🇦 923 34 930ms 10 Sep 2021 769th anter69 🇭🇺 923 34 964ms 24 Feb 2023 769th ovs-code 🇩🇪 923 34 955ms 4 Sep 2023 769th FlyingPenguin223 923 34 957ms 24 Oct 2024 769th edsrzf 🇳🇿 923 34 897ms 26 Jul 2025 774th Lydxn 🇨🇦 923 49 66ms 15 May 2022 774th prplz 🇦🇺 923 49 72ms 16 May 2022 774th GrayJoKing 🇦🇺 923 49 72ms 20 May 2022 774th Steffan153 🇫🇮 923 49 72ms 20 Nov 2022 774th clockworknazo 923 49 78ms 25 Nov 2022 774th Shanethegamer 🇺🇸 923 49 73ms 8 Mar 2023 774th JayXon 🇺🇸 923 49 72ms 19 Mar 2023 774th Yewzir 🇧🇪 923 49 74ms 9 Nov 2023 774th Betuaredead 923 49 70ms 11 Nov 2023 774th pardouin 🇫🇷 923 49 67ms 3 Sep 2024 774th DialFrost 🇸🇬 923 49 70ms 14 Nov 2024 774th sean-niemann 🇺🇸 923 49 69ms 18 Apr 2025 774th edsrzf 🇳🇿 923 49 68ms 26 Jul 2025 774th albanian-laundromat 923 49 84ms 8 Nov 2025 774th snoozingnewt 🇨🇦 923 49 67ms 11 days ago 789th GrayJoKing 🇦🇺 922 49 12ms 23 Nov 2021 789th btnlq 922 49 12ms 9 Dec 2021 789th Lydxn 🇨🇦 922 49 13ms 9 Jan 2022 789th prplz 🇦🇺 922 49 13ms 14 Apr 2022 789th primo-ppcg 🇹🇭 922 49 13ms 2 Jun 2022 789th lynn 922 49 13ms 3 Jun 2022 789th IanUtley 922 49 12ms 12 Nov 2022 789th Steffan153 🇫🇮 922 49 13ms 17 Nov 2022 789th annaproxy 922 49 13ms 8 Jan 2023 789th Yewzir 🇧🇪 922 49 12ms 12 Mar 2024 789th ovs-code 🇩🇪 922 49 13ms 30 Jun 2024 789th DialFrost 🇸🇬 922 49 13ms 24 Mar 2025 First Prev 721–800 of 4,110 Next Last