The Calendar hole will go live in approximately 12 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 720th Irratix 🇳🇱 926 47 1ms 15 Jan 2021 720th dokutan 926 47 2ms 21 Sep 2024 720th GalladeGuy 🇺🇸 926 47 1ms 15 Dec 2024 720th TheDrawingCoder-Gamer 926 47 1ms 3 Jul 2025 720th edsrzf 🇳🇿 926 47 2ms 20 Aug 2025 720th snoozingnewt 🇨🇦 926 47 1ms 15 days ago 727th ovs-code 🇩🇪 926 50 2ms 9 Sep 2022 727th Shanethegamer 🇺🇸 926 50 2ms 9 Sep 2022 727th Lydxn 🇨🇦 926 50 2ms 9 Sep 2022 727th MeWhenI 🇻🇦 926 50 2ms 10 Sep 2022 727th JayXon 🇺🇸 926 50 2ms 10 Sep 2022 727th sean-niemann 🇺🇸 926 50 2ms 10 Sep 2022 727th GrayJoKing 🇦🇺 926 50 2ms 11 Sep 2022 727th btnlq 926 50 2ms 13 Sep 2022 727th clockworknazo 926 50 2ms 12 Oct 2022 727th prplz 🇦🇺 926 50 2ms 30 Nov 2022 727th Steffan153 🇫🇮 926 50 2ms 30 Nov 2022 727th DialFrost 🇸🇬 926 50 2ms 26 Jan 2023 727th inventshah 926 50 3ms 26 Jan 2023 727th m-tkach 🇺🇦 926 50 2ms 2 Jun 2023 727th sisyphus-ppcg 🇦🇺 926 50 2ms 29 Oct 2023 727th Betuaredead 926 50 2ms 13 Nov 2023 727th Yewzir 🇧🇪 926 50 2ms 14 Nov 2023 727th pardouin 🇫🇷 926 50 2ms 22 Aug 2024 727th fuzzylojik-golf 🇺🇸 926 50 2ms 18 Jul 2025 727th GolfingSuccess 🇬🇷 926 50 2ms 10 Aug 2025 727th albanian-laundromat 926 50 2ms 16 Sep 2025 727th snoozingnewt 🇨🇦 926 50 2ms 9 days ago 749th cure-honey 🇯🇵 926 62 116ms 29 Jun 2021 749th nipzu 926 62 118ms 13 Jan 2022 749th Creative0708 🇨🇦 926 62 114ms 16 Dec 2023 749th okaponta 926 62 122ms 11 Jan 2024 749th dokutan 926 62 121ms 27 Mar 2024 749th ian-h-chamberlain 🇺🇸 926 62 133ms 3 Nov 2025 749th luuumine 🇫🇷 926 62 113ms 11 Nov 2025 756th Lydxn 🇨🇦 924 40 10ms 4 Jan 2022 756th saito-ta 🇯🇵 924 40 3ms 9 Nov 2023 758th GrayJoKing 🇦🇺 924 46 3ms 29 Sep 2022 758th Lydxn 🇨🇦 924 46 3ms 29 Sep 2022 758th ovs-code 🇩🇪 924 46 3ms 29 Sep 2022 758th clockworknazo 924 46 3ms 30 Sep 2022 758th DialFrost 🇸🇬 924 46 3ms 29 Jan 2023 758th Steffan153 🇫🇮 924 46 3ms 3 Feb 2023 758th sisyphus-ppcg 🇦🇺 924 46 3ms 6 Feb 2023 758th prplz 🇦🇺 924 46 3ms 16 May 2023 758th sean-niemann 🇺🇸 924 46 3ms 23 Oct 2023 758th xsot 🇸🇬 924 46 3ms 8 Feb 2024 758th Yewzir 🇧🇪 924 46 3ms 2 Mar 2024 758th pardouin 🇫🇷 924 46 3ms 22 Aug 2024 758th edsrzf 🇳🇿 924 46 3ms 8 Nov 2025 771st MeWhenI 🇻🇦 923 34 930ms 10 Sep 2021 771st anter69 🇭🇺 923 34 964ms 24 Feb 2023 771st ovs-code 🇩🇪 923 34 955ms 4 Sep 2023 771st FlyingPenguin223 923 34 957ms 24 Oct 2024 771st edsrzf 🇳🇿 923 34 897ms 26 Jul 2025 776th Lydxn 🇨🇦 923 49 66ms 15 May 2022 776th prplz 🇦🇺 923 49 72ms 16 May 2022 776th GrayJoKing 🇦🇺 923 49 72ms 20 May 2022 776th Steffan153 🇫🇮 923 49 72ms 20 Nov 2022 776th clockworknazo 923 49 78ms 25 Nov 2022 776th Shanethegamer 🇺🇸 923 49 73ms 8 Mar 2023 776th JayXon 🇺🇸 923 49 72ms 19 Mar 2023 776th Yewzir 🇧🇪 923 49 74ms 9 Nov 2023 776th Betuaredead 923 49 70ms 11 Nov 2023 776th pardouin 🇫🇷 923 49 67ms 3 Sep 2024 776th DialFrost 🇸🇬 923 49 70ms 14 Nov 2024 776th sean-niemann 🇺🇸 923 49 69ms 18 Apr 2025 776th edsrzf 🇳🇿 923 49 68ms 26 Jul 2025 776th albanian-laundromat 923 49 84ms 8 Nov 2025 776th snoozingnewt 🇨🇦 923 49 67ms 12 days ago 791st GrayJoKing 🇦🇺 922 49 12ms 23 Nov 2021 791st btnlq 922 49 12ms 9 Dec 2021 791st Lydxn 🇨🇦 922 49 13ms 9 Jan 2022 791st prplz 🇦🇺 922 49 13ms 14 Apr 2022 791st primo-ppcg 🇹🇭 922 49 13ms 2 Jun 2022 791st lynn 922 49 13ms 3 Jun 2022 791st IanUtley 922 49 12ms 12 Nov 2022 791st Steffan153 🇫🇮 922 49 13ms 17 Nov 2022 791st annaproxy 922 49 13ms 8 Jan 2023 791st Yewzir 🇧🇪 922 49 12ms 12 Mar 2024 First Prev 721–800 of 4,111 Next Last