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 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 878th stefangimmillaro 935 53 99ms 15 Oct 2022 878th Steffan153 🇫🇮 935 53 94ms 17 Nov 2022 878th prplz 🇦🇺 935 53 98ms 24 Nov 2022 878th sean-niemann 🇺🇸 935 53 134ms 17 Feb 2023 878th Shanethegamer 🇺🇸 935 53 96ms 8 Mar 2023 878th m-tkach 🇺🇦 935 53 98ms 2 Jun 2023 878th Alex-x90 🇺🇸 935 53 97ms 17 Jul 2023 878th DialFrost 🇸🇬 935 53 99ms 26 Oct 2023 878th Betuaredead 935 53 98ms 13 Nov 2023 878th Yewzir 🇧🇪 935 53 102ms 14 Nov 2023 878th pardouin 🇫🇷 935 53 96ms 21 Aug 2024 878th voytxt 🇨🇿 935 53 98ms 12 Jan 2025 878th edsrzf 🇳🇿 935 53 102ms 26 Jul 2025 878th fuzzylojik-golf 🇺🇸 935 53 102ms 28 Aug 2025 878th snoozingnewt 🇨🇦 935 53 104ms 15 days ago 896th GrayJoKing 🇦🇺 934 46 3ms 29 Sep 2022 896th Lydxn 🇨🇦 934 46 3ms 29 Sep 2022 896th ovs-code 🇩🇪 934 46 3ms 29 Sep 2022 896th clockworknazo 934 46 3ms 30 Sep 2022 896th DialFrost 🇸🇬 934 46 3ms 29 Jan 2023 896th Steffan153 🇫🇮 934 46 3ms 3 Feb 2023 896th sisyphus-ppcg 🇦🇺 934 46 3ms 6 Feb 2023 896th prplz 🇦🇺 934 46 3ms 16 May 2023 896th sean-niemann 🇺🇸 934 46 3ms 23 Oct 2023 896th xsot 🇸🇬 934 46 3ms 8 Feb 2024 896th Yewzir 🇧🇪 934 46 3ms 2 Mar 2024 896th pardouin 🇫🇷 934 46 3ms 22 Aug 2024 896th edsrzf 🇳🇿 934 46 3ms 8 Nov 2025 909th Lydxn 🇨🇦 933 40 10ms 4 Jan 2022 909th saito-ta 🇯🇵 933 40 3ms 9 Nov 2023 909th sean-niemann 🇺🇸 933 40 651ms 12 Sep 2025 909th edsrzf 🇳🇿 933 40 662ms 13 Sep 2025 909th xsot 🇸🇬 933 40 723ms 12 Nov 2025 909th snoozingnewt 🇨🇦 933 40 651ms 8 days ago 915th caasinehc 933 44 9ms 16 Oct 2018 915th xweronika 933 44 9ms 23 Oct 2018 915th skps2010 933 44 9ms 3 Jan 2019 915th alasdair-greenland 933 44 9ms 6 Mar 2020 915th taklam 933 44 9ms 20 May 2020 915th daisy-lau 933 44 9ms 29 May 2020 915th Pixels4Breakfast 933 44 9ms 7 Mar 2022 915th niklv 🇷🇺 933 44 8ms 29 Jul 2022 915th 5quiwyrm 933 44 9ms 9 Sep 2022 915th kellantech 933 44 9ms 10 days ago 925th Attero 🇸🇪 933 47 1ms 29 Mar 2020 925th Irratix 🇳🇱 933 47 1ms 15 Jan 2021 925th dokutan 933 47 2ms 21 Sep 2024 925th GalladeGuy 🇺🇸 933 47 1ms 15 Dec 2024 925th TheDrawingCoder-Gamer 933 47 1ms 3 Jul 2025 925th edsrzf 🇳🇿 933 47 2ms 20 Aug 2025 925th snoozingnewt 🇨🇦 933 47 1ms 15 days ago 932nd Lydxn 🇨🇦 933 49 66ms 15 May 2022 932nd prplz 🇦🇺 933 49 72ms 16 May 2022 932nd GrayJoKing 🇦🇺 933 49 72ms 20 May 2022 932nd Steffan153 🇫🇮 933 49 72ms 20 Nov 2022 932nd clockworknazo 933 49 78ms 25 Nov 2022 932nd Shanethegamer 🇺🇸 933 49 73ms 8 Mar 2023 932nd JayXon 🇺🇸 933 49 72ms 19 Mar 2023 932nd Yewzir 🇧🇪 933 49 74ms 9 Nov 2023 932nd Betuaredead 933 49 70ms 11 Nov 2023 932nd pardouin 🇫🇷 933 49 67ms 3 Sep 2024 932nd DialFrost 🇸🇬 933 49 70ms 14 Nov 2024 932nd sean-niemann 🇺🇸 933 49 69ms 18 Apr 2025 932nd edsrzf 🇳🇿 933 49 68ms 26 Jul 2025 932nd albanian-laundromat 933 49 84ms 8 Nov 2025 932nd snoozingnewt 🇨🇦 933 49 67ms 12 days ago 947th GrayJoKing 🇦🇺 932 49 12ms 23 Nov 2021 947th btnlq 932 49 12ms 9 Dec 2021 947th Lydxn 🇨🇦 932 49 13ms 9 Jan 2022 947th prplz 🇦🇺 932 49 13ms 14 Apr 2022 947th primo-ppcg 🇹🇭 932 49 13ms 2 Jun 2022 947th lynn 932 49 13ms 3 Jun 2022 947th IanUtley 932 49 12ms 12 Nov 2022 947th Steffan153 🇫🇮 932 49 13ms 17 Nov 2022 947th annaproxy 932 49 13ms 8 Jan 2023 947th Yewzir 🇧🇪 932 49 12ms 12 Mar 2024 947th ovs-code 🇩🇪 932 49 13ms 30 Jun 2024 947th DialFrost 🇸🇬 932 49 13ms 24 Mar 2025 947th sean-niemann 🇺🇸 932 49 13ms 25 Mar 2025 947th GolfingSuccess 🇬🇷 932 49 12ms 10 Aug 2025 First Prev 881–960 of 4,135 Next Last