The Calendar hole will go live in approximately 12 days. Why not try and solve it ahead of time?
Niven Numbers (Long) 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 319th rhdqor213 933 63 4ms 20 Aug 2023 319th Steffan153 🇫🇮 933 63 4ms 28 Jul 2024 319th sean-niemann 🇺🇸 933 63 4ms 1 Aug 2024 319th fuzzylojik-golf 🇺🇸 933 63 4ms 14 Jul 2025 325th sisyphus-ppcg 🇦🇺 932 50 106ms 14 Dec 2022 325th Lydxn 🇨🇦 932 50 108ms 15 Dec 2022 325th DialFrost 🇸🇬 932 50 100ms 2 Jul 2025 325th sean-niemann 🇺🇸 932 50 121ms 3 Jul 2025 325th ovs-code 🇩🇪 932 50 99ms 10 days ago 330th sean-niemann 🇺🇸 930 51 153ms 7 Aug 2024 330th Steffan153 🇫🇮 930 51 140ms 8 Aug 2024 332nd ovs-code 🇩🇪 928 50 345ms 15 Jan 2024 332nd Shanethegamer 🇺🇸 928 50 342ms 16 Jan 2024 332nd Steffan153 🇫🇮 928 50 354ms 16 Jan 2024 332nd AlephSquirrel 928 50 341ms 16 Jan 2024 332nd xsot 🇸🇬 928 50 354ms 25 Jan 2024 332nd MeWhenI 🇻🇦 928 50 344ms 24 May 2024 332nd kg583 🇺🇸 928 50 340ms 28 Jul 2024 332nd CaedenHarper 🇨🇦 928 50 1,059ms 10 days ago 340th Steffan153 🇫🇮 928 53 11ms 18 Apr 2023 340th primo-ppcg 🇹🇭 928 53 13ms 27 Apr 2023 340th Lydxn 🇨🇦 928 53 12ms 10 May 2023 340th Shanethegamer 🇺🇸 928 53 11ms 23 May 2023 340th GrayJoKing 🇦🇺 928 53 12ms 15 Aug 2023 340th btnlq 928 53 12ms 21 Oct 2023 340th edsrzf 🇳🇿 928 53 11ms 18 Jan 2025 340th sean-niemann 🇺🇸 928 53 11ms 26 Apr 2025 340th kg583 🇺🇸 928 53 12ms 16 Oct 2025 349th andersk 🇺🇸 928 77 123ms 7 Nov 2022 349th JayXon 🇺🇸 928 77 120ms 10 Nov 2022 349th Lydxn 🇨🇦 928 77 120ms 11 Nov 2022 349th sean-niemann 🇺🇸 928 77 127ms 1 Aug 2024 349th pardouin 🇫🇷 928 77 129ms 21 Oct 2024 349th DialFrost 🇸🇬 928 77 131ms 11 Apr 2025 349th acotis 928 77 125ms 10 Jun 2025 349th fuzzylojik-golf 🇺🇸 928 77 121ms 13 Jul 2025 349th kumavale 928 77 123ms 7 Sep 2025 358th GrayJoKing 🇦🇺 927 52 37ms 8 Aug 2022 358th KrausRaus 🇺🇸 927 52 34ms 8 Aug 2022 358th inventshah 927 52 34ms 8 Aug 2022 358th CubeyTheCube 927 52 35ms 8 Aug 2022 358th akshatj27 🇦🇶 927 52 33ms 8 Aug 2022 358th Natanaelel 🇸🇪 927 52 12ms 9 Aug 2022 358th NewDefectus 🇮🇱 927 52 33ms 9 Aug 2022 358th itsh01 927 52 33ms 10 Aug 2022 358th didion0 🇺🇸 927 52 34ms 10 Aug 2022 358th jared-hughes 927 52 33ms 22 Sep 2022 358th ovs-code 🇩🇪 927 52 35ms 12 Jan 2023 358th DialFrost 🇸🇬 927 52 34ms 27 Jan 2023 358th crazyrussianboris 🇷🇺 927 52 35ms 22 Feb 2023 358th voytxt 🇨🇿 927 52 34ms 10 May 2023 358th raszpi 🇭🇺 927 52 34ms 3 Sep 2023 358th Argeento 🇵🇱 927 52 34ms 9 Sep 2023 358th weliveinhell 🇭🇹 927 52 11ms 27 Sep 2023 358th stefangimmillaro 927 52 33ms 29 Sep 2023 358th m-tkach 🇺🇦 927 52 33ms 29 Sep 2023 358th Davr1 🇨🇿 927 52 33ms 14 Oct 2023 358th coreynash 927 52 35ms 21 Nov 2023 358th olleicua 🇺🇸 927 52 33ms 10 Jan 2024 358th two-bad 🇬🇧 927 52 35ms 3 Feb 2024 358th thisishowmymindworks 🇳🇴 927 52 35ms 9 Jun 2024 358th emgordon154 927 52 37ms 25 Jun 2024 358th junkondo-jp 927 52 37ms 30 Jun 2024 358th Shanethegamer 🇺🇸 927 52 35ms 10 Oct 2024 358th KingSkyrock 🇺🇸 927 52 34ms 14 Oct 2024 358th madeforlosers 927 52 35ms 17 Oct 2024 358th error256 927 52 34ms 1 Nov 2024 358th b-illy 🇬🇧 927 52 34ms 18 Feb 2025 358th Lv0Sys 🇵🇱 927 52 34ms 31 May 2025 358th BREMAUCY 🇫🇷 927 52 33ms 25 Jun 2025 358th acollett89 927 52 35ms 1 Aug 2025 358th CaedenHarper 🇨🇦 927 52 34ms 22 Aug 2025 358th snoozingnewt 🇨🇦 927 52 34ms 30 Sep 2025 358th JOrE20 🇺🇸 927 52 36ms 17 Nov 2025 358th Yax42 🇫🇷 927 52 11ms 8 days ago 396th xsot 🇸🇬 926 51 49ms 22 Jul 2025 396th emplv 🇱🇻 926 51 49ms 22 Jul 2025 398th DialFrost 🇸🇬 926 54 3ms 18 Nov 2025 398th JayXon 🇺🇸 926 54 4ms 19 Nov 2025 398th sean-niemann 🇺🇸 926 54 3ms 19 Nov 2025 First Prev 321–400 of 2,482 Next Last