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 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 876th prplz 🇦🇺 935 53 98ms 24 Nov 2022 876th sean-niemann 🇺🇸 935 53 134ms 17 Feb 2023 876th Shanethegamer 🇺🇸 935 53 96ms 8 Mar 2023 876th m-tkach 🇺🇦 935 53 98ms 2 Jun 2023 876th Alex-x90 🇺🇸 935 53 97ms 17 Jul 2023 876th DialFrost 🇸🇬 935 53 99ms 26 Oct 2023 876th Betuaredead 935 53 98ms 13 Nov 2023 876th Yewzir 🇧🇪 935 53 102ms 14 Nov 2023 876th pardouin 🇫🇷 935 53 96ms 21 Aug 2024 876th voytxt 🇨🇿 935 53 98ms 12 Jan 2025 876th edsrzf 🇳🇿 935 53 102ms 26 Jul 2025 876th fuzzylojik-golf 🇺🇸 935 53 102ms 28 Aug 2025 876th snoozingnewt 🇨🇦 935 53 104ms 14 days ago 894th GrayJoKing 🇦🇺 934 46 3ms 29 Sep 2022 894th Lydxn 🇨🇦 934 46 3ms 29 Sep 2022 894th ovs-code 🇩🇪 934 46 3ms 29 Sep 2022 894th clockworknazo 934 46 3ms 30 Sep 2022 894th DialFrost 🇸🇬 934 46 3ms 29 Jan 2023 894th Steffan153 🇫🇮 934 46 3ms 3 Feb 2023 894th sisyphus-ppcg 🇦🇺 934 46 3ms 6 Feb 2023 894th prplz 🇦🇺 934 46 3ms 16 May 2023 894th sean-niemann 🇺🇸 934 46 3ms 23 Oct 2023 894th xsot 🇸🇬 934 46 3ms 8 Feb 2024 894th Yewzir 🇧🇪 934 46 3ms 2 Mar 2024 894th pardouin 🇫🇷 934 46 3ms 22 Aug 2024 894th edsrzf 🇳🇿 934 46 3ms 8 Nov 2025 907th Lydxn 🇨🇦 933 40 10ms 4 Jan 2022 907th saito-ta 🇯🇵 933 40 3ms 9 Nov 2023 907th sean-niemann 🇺🇸 933 40 651ms 12 Sep 2025 907th edsrzf 🇳🇿 933 40 662ms 13 Sep 2025 907th xsot 🇸🇬 933 40 723ms 12 Nov 2025 907th snoozingnewt 🇨🇦 933 40 651ms 8 days ago 913th caasinehc 933 44 9ms 16 Oct 2018 913th xweronika 933 44 9ms 23 Oct 2018 913th skps2010 933 44 9ms 3 Jan 2019 913th alasdair-greenland 933 44 9ms 6 Mar 2020 913th taklam 933 44 9ms 20 May 2020 913th daisy-lau 933 44 9ms 29 May 2020 913th Pixels4Breakfast 933 44 9ms 7 Mar 2022 913th niklv 🇷🇺 933 44 8ms 29 Jul 2022 913th 5quiwyrm 933 44 9ms 9 Sep 2022 913th kellantech 933 44 9ms 9 days ago 923rd Attero 🇸🇪 933 47 1ms 29 Mar 2020 923rd Irratix 🇳🇱 933 47 1ms 15 Jan 2021 923rd dokutan 933 47 2ms 21 Sep 2024 923rd GalladeGuy 🇺🇸 933 47 1ms 15 Dec 2024 923rd TheDrawingCoder-Gamer 933 47 1ms 3 Jul 2025 923rd edsrzf 🇳🇿 933 47 2ms 20 Aug 2025 923rd snoozingnewt 🇨🇦 933 47 1ms 14 days ago 930th Lydxn 🇨🇦 933 49 66ms 15 May 2022 930th prplz 🇦🇺 933 49 72ms 16 May 2022 930th GrayJoKing 🇦🇺 933 49 72ms 20 May 2022 930th Steffan153 🇫🇮 933 49 72ms 20 Nov 2022 930th clockworknazo 933 49 78ms 25 Nov 2022 930th Shanethegamer 🇺🇸 933 49 73ms 8 Mar 2023 930th JayXon 🇺🇸 933 49 72ms 19 Mar 2023 930th Yewzir 🇧🇪 933 49 74ms 9 Nov 2023 930th Betuaredead 933 49 70ms 11 Nov 2023 930th pardouin 🇫🇷 933 49 67ms 3 Sep 2024 930th DialFrost 🇸🇬 933 49 70ms 14 Nov 2024 930th sean-niemann 🇺🇸 933 49 69ms 18 Apr 2025 930th edsrzf 🇳🇿 933 49 68ms 26 Jul 2025 930th albanian-laundromat 933 49 84ms 8 Nov 2025 930th snoozingnewt 🇨🇦 933 49 67ms 11 days ago 945th GrayJoKing 🇦🇺 932 49 12ms 23 Nov 2021 945th btnlq 932 49 12ms 9 Dec 2021 945th Lydxn 🇨🇦 932 49 13ms 9 Jan 2022 945th prplz 🇦🇺 932 49 13ms 14 Apr 2022 945th primo-ppcg 🇹🇭 932 49 13ms 2 Jun 2022 945th lynn 932 49 13ms 3 Jun 2022 945th IanUtley 932 49 12ms 12 Nov 2022 945th Steffan153 🇫🇮 932 49 13ms 17 Nov 2022 945th annaproxy 932 49 13ms 8 Jan 2023 945th Yewzir 🇧🇪 932 49 12ms 12 Mar 2024 945th ovs-code 🇩🇪 932 49 13ms 30 Jun 2024 945th DialFrost 🇸🇬 932 49 13ms 24 Mar 2025 945th sean-niemann 🇺🇸 932 49 13ms 25 Mar 2025 945th GolfingSuccess 🇬🇷 932 49 12ms 10 Aug 2025 945th snoozingnewt 🇨🇦 932 49 14ms 10 days ago 960th cure-honey 🇯🇵 932 62 116ms 29 Jun 2021 First Prev 881–960 of 4,134 Next Last