The Calendar hole will go live in approximately 8 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 716th sean-niemann 🇺🇸 926 50 2ms 10 Sep 2022 716th GrayJoKing 🇦🇺 926 50 2ms 11 Sep 2022 716th btnlq 926 50 2ms 13 Sep 2022 716th clockworknazo 926 50 2ms 12 Oct 2022 716th prplz 🇦🇺 926 50 2ms 30 Nov 2022 716th Steffan153 🇫🇮 926 50 2ms 30 Nov 2022 716th DialFrost 🇸🇬 926 50 2ms 26 Jan 2023 716th inventshah 926 50 3ms 26 Jan 2023 716th m-tkach 🇺🇦 926 50 2ms 2 Jun 2023 716th sisyphus-ppcg 🇦🇺 926 50 2ms 29 Oct 2023 716th Betuaredead 926 50 2ms 13 Nov 2023 716th Yewzir 🇧🇪 926 50 2ms 14 Nov 2023 716th pardouin 🇫🇷 926 50 2ms 22 Aug 2024 716th fuzzylojik-golf 🇺🇸 926 50 2ms 18 Jul 2025 716th GolfingSuccess 🇬🇷 926 50 2ms 10 Aug 2025 716th albanian-laundromat 926 50 2ms 16 Sep 2025 716th snoozingnewt 🇨🇦 926 50 2ms 14 days ago 738th cure-honey 🇯🇵 926 62 116ms 29 Jun 2021 738th nipzu 926 62 118ms 13 Jan 2022 738th Creative0708 🇨🇦 926 62 114ms 16 Dec 2023 738th okaponta 926 62 122ms 11 Jan 2024 738th dokutan 926 62 121ms 27 Mar 2024 738th ian-h-chamberlain 🇺🇸 926 62 133ms 3 Nov 2025 738th luuumine 🇫🇷 926 62 113ms 11 Nov 2025 745th Lydxn 🇨🇦 924 40 10ms 4 Jan 2022 745th saito-ta 🇯🇵 924 40 3ms 9 Nov 2023 747th GrayJoKing 🇦🇺 924 46 3ms 29 Sep 2022 747th Lydxn 🇨🇦 924 46 3ms 29 Sep 2022 747th ovs-code 🇩🇪 924 46 3ms 29 Sep 2022 747th clockworknazo 924 46 3ms 30 Sep 2022 747th DialFrost 🇸🇬 924 46 3ms 29 Jan 2023 747th Steffan153 🇫🇮 924 46 3ms 3 Feb 2023 747th sisyphus-ppcg 🇦🇺 924 46 3ms 6 Feb 2023 747th prplz 🇦🇺 924 46 3ms 16 May 2023 747th sean-niemann 🇺🇸 924 46 3ms 23 Oct 2023 747th xsot 🇸🇬 924 46 3ms 8 Feb 2024 747th Yewzir 🇧🇪 924 46 3ms 2 Mar 2024 747th pardouin 🇫🇷 924 46 3ms 22 Aug 2024 747th edsrzf 🇳🇿 924 46 3ms 8 Nov 2025 760th Attero 🇸🇪 924 47 2ms 29 Mar 2020 760th Irratix 🇳🇱 924 47 3ms 15 Jan 2021 760th dokutan 924 47 1ms 21 Sep 2024 760th GalladeGuy 🇺🇸 924 47 2ms 15 Dec 2024 760th TheDrawingCoder-Gamer 924 47 2ms 3 Jul 2025 760th edsrzf 🇳🇿 924 47 2ms 20 Aug 2025 760th snoozingnewt 🇨🇦 924 47 2ms 5 hours ago 767th MeWhenI 🇻🇦 923 34 930ms 10 Sep 2021 767th anter69 🇭🇺 923 34 964ms 24 Feb 2023 767th ovs-code 🇩🇪 923 34 955ms 4 Sep 2023 767th FlyingPenguin223 923 34 957ms 24 Oct 2024 767th edsrzf 🇳🇿 923 34 897ms 26 Jul 2025 772nd Lydxn 🇨🇦 923 49 66ms 15 May 2022 772nd prplz 🇦🇺 923 49 72ms 16 May 2022 772nd GrayJoKing 🇦🇺 923 49 72ms 20 May 2022 772nd Steffan153 🇫🇮 923 49 72ms 20 Nov 2022 772nd clockworknazo 923 49 78ms 25 Nov 2022 772nd Shanethegamer 🇺🇸 923 49 73ms 8 Mar 2023 772nd JayXon 🇺🇸 923 49 72ms 19 Mar 2023 772nd Yewzir 🇧🇪 923 49 74ms 9 Nov 2023 772nd Betuaredead 923 49 70ms 11 Nov 2023 772nd pardouin 🇫🇷 923 49 67ms 3 Sep 2024 772nd DialFrost 🇸🇬 923 49 70ms 14 Nov 2024 772nd sean-niemann 🇺🇸 923 49 69ms 18 Apr 2025 772nd edsrzf 🇳🇿 923 49 68ms 26 Jul 2025 772nd albanian-laundromat 923 49 84ms 8 Nov 2025 772nd snoozingnewt 🇨🇦 923 49 67ms 17 days ago 787th GrayJoKing 🇦🇺 922 49 12ms 23 Nov 2021 787th btnlq 922 49 12ms 9 Dec 2021 787th Lydxn 🇨🇦 922 49 13ms 9 Jan 2022 787th prplz 🇦🇺 922 49 13ms 14 Apr 2022 787th primo-ppcg 🇹🇭 922 49 13ms 2 Jun 2022 787th lynn 922 49 13ms 3 Jun 2022 787th IanUtley 922 49 12ms 12 Nov 2022 787th Steffan153 🇫🇮 922 49 13ms 17 Nov 2022 787th annaproxy 922 49 13ms 8 Jan 2023 787th Yewzir 🇧🇪 922 49 12ms 12 Mar 2024 787th ovs-code 🇩🇪 922 49 13ms 30 Jun 2024 787th DialFrost 🇸🇬 922 49 13ms 24 Mar 2025 787th sean-niemann 🇺🇸 922 49 13ms 25 Mar 2025 787th GolfingSuccess 🇬🇷 922 49 12ms 10 Aug 2025 First Prev 721–800 of 4,109 Next Last