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 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 874th Shanethegamer 🇺🇸 935 53 96ms 8 Mar 2023 874th m-tkach 🇺🇦 935 53 98ms 2 Jun 2023 874th Alex-x90 🇺🇸 935 53 97ms 17 Jul 2023 874th DialFrost 🇸🇬 935 53 99ms 26 Oct 2023 874th Betuaredead 935 53 98ms 13 Nov 2023 874th Yewzir 🇧🇪 935 53 102ms 14 Nov 2023 874th pardouin 🇫🇷 935 53 96ms 21 Aug 2024 874th voytxt 🇨🇿 935 53 98ms 12 Jan 2025 874th edsrzf 🇳🇿 935 53 102ms 26 Jul 2025 874th fuzzylojik-golf 🇺🇸 935 53 102ms 28 Aug 2025 874th snoozingnewt 🇨🇦 935 53 104ms 19 days ago 892nd GrayJoKing 🇦🇺 934 46 3ms 29 Sep 2022 892nd Lydxn 🇨🇦 934 46 3ms 29 Sep 2022 892nd ovs-code 🇩🇪 934 46 3ms 29 Sep 2022 892nd clockworknazo 934 46 3ms 30 Sep 2022 892nd DialFrost 🇸🇬 934 46 3ms 29 Jan 2023 892nd Steffan153 🇫🇮 934 46 3ms 3 Feb 2023 892nd sisyphus-ppcg 🇦🇺 934 46 3ms 6 Feb 2023 892nd prplz 🇦🇺 934 46 3ms 16 May 2023 892nd sean-niemann 🇺🇸 934 46 3ms 23 Oct 2023 892nd xsot 🇸🇬 934 46 3ms 8 Feb 2024 892nd Yewzir 🇧🇪 934 46 3ms 2 Mar 2024 892nd pardouin 🇫🇷 934 46 3ms 22 Aug 2024 892nd edsrzf 🇳🇿 934 46 3ms 8 Nov 2025 905th Lydxn 🇨🇦 933 40 10ms 4 Jan 2022 905th saito-ta 🇯🇵 933 40 3ms 9 Nov 2023 905th sean-niemann 🇺🇸 933 40 651ms 12 Sep 2025 905th edsrzf 🇳🇿 933 40 662ms 13 Sep 2025 905th xsot 🇸🇬 933 40 723ms 12 Nov 2025 905th snoozingnewt 🇨🇦 933 40 651ms 13 days ago 911th caasinehc 933 44 9ms 16 Oct 2018 911th xweronika 933 44 9ms 23 Oct 2018 911th skps2010 933 44 9ms 3 Jan 2019 911th alasdair-greenland 933 44 9ms 6 Mar 2020 911th taklam 933 44 9ms 20 May 2020 911th daisy-lau 933 44 9ms 29 May 2020 911th Pixels4Breakfast 933 44 9ms 7 Mar 2022 911th niklv 🇷🇺 933 44 8ms 29 Jul 2022 911th 5quiwyrm 933 44 9ms 9 Sep 2022 911th kellantech 933 44 9ms 14 days ago 921st Lydxn 🇨🇦 933 49 66ms 15 May 2022 921st prplz 🇦🇺 933 49 72ms 16 May 2022 921st GrayJoKing 🇦🇺 933 49 72ms 20 May 2022 921st Steffan153 🇫🇮 933 49 72ms 20 Nov 2022 921st clockworknazo 933 49 78ms 25 Nov 2022 921st Shanethegamer 🇺🇸 933 49 73ms 8 Mar 2023 921st JayXon 🇺🇸 933 49 72ms 19 Mar 2023 921st Yewzir 🇧🇪 933 49 74ms 9 Nov 2023 921st Betuaredead 933 49 70ms 11 Nov 2023 921st pardouin 🇫🇷 933 49 67ms 3 Sep 2024 921st DialFrost 🇸🇬 933 49 70ms 14 Nov 2024 921st sean-niemann 🇺🇸 933 49 69ms 18 Apr 2025 921st edsrzf 🇳🇿 933 49 68ms 26 Jul 2025 921st albanian-laundromat 933 49 84ms 8 Nov 2025 921st snoozingnewt 🇨🇦 933 49 67ms 16 days ago 936th Attero 🇸🇪 932 47 2ms 29 Mar 2020 936th Irratix 🇳🇱 932 47 3ms 15 Jan 2021 936th dokutan 932 47 1ms 21 Sep 2024 936th GalladeGuy 🇺🇸 932 47 2ms 15 Dec 2024 936th TheDrawingCoder-Gamer 932 47 2ms 3 Jul 2025 936th edsrzf 🇳🇿 932 47 2ms 20 Aug 2025 936th snoozingnewt 🇨🇦 932 47 2ms 101 mins ago 943rd GrayJoKing 🇦🇺 932 49 12ms 23 Nov 2021 943rd btnlq 932 49 12ms 9 Dec 2021 943rd Lydxn 🇨🇦 932 49 13ms 9 Jan 2022 943rd prplz 🇦🇺 932 49 13ms 14 Apr 2022 943rd primo-ppcg 🇹🇭 932 49 13ms 2 Jun 2022 943rd lynn 932 49 13ms 3 Jun 2022 943rd IanUtley 932 49 12ms 12 Nov 2022 943rd Steffan153 🇫🇮 932 49 13ms 17 Nov 2022 943rd annaproxy 932 49 13ms 8 Jan 2023 943rd Yewzir 🇧🇪 932 49 12ms 12 Mar 2024 943rd ovs-code 🇩🇪 932 49 13ms 30 Jun 2024 943rd DialFrost 🇸🇬 932 49 13ms 24 Mar 2025 943rd sean-niemann 🇺🇸 932 49 13ms 25 Mar 2025 943rd GolfingSuccess 🇬🇷 932 49 12ms 10 Aug 2025 943rd snoozingnewt 🇨🇦 932 49 14ms 15 days ago 958th cure-honey 🇯🇵 932 62 116ms 29 Jun 2021 958th nipzu 932 62 118ms 13 Jan 2022 958th Creative0708 🇨🇦 932 62 114ms 16 Dec 2023 First Prev 881–960 of 4,133 Next Last