The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Niven Numbers (Long) 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 300th olleicua 🇺🇸 923 52 33ms 10 Jan 2024 300th two-bad 🇬🇧 923 52 35ms 3 Feb 2024 300th thisishowmymindworks 🇳🇴 923 52 35ms 9 Jun 2024 300th emgordon154 923 52 37ms 25 Jun 2024 300th junkondo-jp 923 52 37ms 30 Jun 2024 300th Shanethegamer 🇺🇸 923 52 35ms 10 Oct 2024 300th KingSkyrock 🇺🇸 923 52 34ms 14 Oct 2024 300th madeforlosers 923 52 35ms 17 Oct 2024 300th error256 923 52 34ms 1 Nov 2024 300th b-illy 🇬🇧 923 52 34ms 18 Feb 2025 300th Lv0Sys 🇵🇱 923 52 34ms 31 May 2025 300th BREMAUCY 🇫🇷 923 52 33ms 25 Jun 2025 300th acollett89 923 52 35ms 1 Aug 2025 300th CaedenHarper 🇨🇦 923 52 34ms 22 Aug 2025 300th snoozingnewt 🇨🇦 923 52 34ms 30 Sep 2025 300th JOrE20 🇺🇸 923 52 36ms 17 Nov 2025 300th Yax42 🇫🇷 923 52 11ms 8 days ago 338th Shanethegamer 🇺🇸 923 69 368ms 8 Aug 2022 338th GrayJoKing 🇦🇺 923 69 367ms 14 Aug 2022 338th revlayle 🇺🇸 923 69 371ms 16 Aug 2022 338th stefangimmillaro 923 69 368ms 23 Aug 2022 338th Steffan153 🇫🇮 923 69 371ms 2 Oct 2022 338th tomtheisen 🇺🇸 923 69 372ms 7 Dec 2022 338th sisyphus-ppcg 🇦🇺 923 69 379ms 7 Dec 2022 338th AdrienHache 🇫🇷 923 69 437ms 31 May 2023 338th sean-niemann 🇺🇸 923 69 405ms 18 Jun 2023 338th Adix-null 🇱🇹 923 69 396ms 30 Jul 2023 338th MeWhenI 🇻🇦 923 69 370ms 16 Aug 2023 338th annaproxy 923 69 376ms 22 Oct 2023 338th namelessiw 923 69 371ms 19 Dec 2023 338th michelebastione 🇮🇹 923 69 407ms 27 Aug 2025 338th tomh1012 923 69 436ms 15 days ago 338th snoozingnewt 🇨🇦 923 69 410ms 8 days ago 338th DialFrost 🇸🇬 923 69 391ms 8 days ago 338th mwarvik 923 69 391ms 2 days ago 338th amazingalek 923 69 407ms 2 days ago 357th snoozingnewt 🇨🇦 922 42 338ms 7 days ago 358th Steffan153 🇫🇮 922 82 73ms 28 Jul 2024 358th sean-niemann 🇺🇸 922 82 80ms 1 Aug 2024 358th fuzzylojik-golf 🇺🇸 922 82 63ms 14 Jul 2025 361st Steffan153 🇫🇮 921 53 11ms 18 Apr 2023 361st primo-ppcg 🇹🇭 921 53 13ms 27 Apr 2023 361st Lydxn 🇨🇦 921 53 12ms 10 May 2023 361st Shanethegamer 🇺🇸 921 53 11ms 23 May 2023 361st GrayJoKing 🇦🇺 921 53 12ms 15 Aug 2023 361st btnlq 921 53 12ms 21 Oct 2023 361st edsrzf 🇳🇿 921 53 11ms 18 Jan 2025 361st sean-niemann 🇺🇸 921 53 11ms 26 Apr 2025 361st kg583 🇺🇸 921 53 12ms 16 Oct 2025 370th xsot 🇸🇬 920 51 49ms 22 Jul 2025 370th emplv 🇱🇻 920 51 49ms 22 Jul 2025 372nd scpchicken 🇵🇼 920 53 14ms 15 Apr 2023 372nd kaptsanovb 920 53 16ms 28 Jun 2023 372nd 2011-Chan-Ethan 920 53 18ms 12 Jul 2023 372nd inventshah 920 53 14ms 29 Jul 2024 372nd agreegious 920 53 16ms 16 Mar 2025 372nd qpwoeirut 920 53 17ms 1 Oct 2025 372nd snoozingnewt 🇨🇦 920 53 16ms 26 days ago 379th JayXon 🇺🇸 920 61 83ms 10 Nov 2022 379th Lydxn 🇨🇦 920 61 82ms 11 Nov 2022 379th Steffan153 🇫🇮 920 61 83ms 28 Jul 2024 379th sean-niemann 🇺🇸 920 61 82ms 1 Aug 2024 379th pardouin 🇫🇷 920 61 80ms 21 Oct 2024 379th DialFrost 🇸🇬 920 61 82ms 11 Apr 2025 379th fuzzylojik-golf 🇺🇸 920 61 79ms 13 Jul 2025 386th DialFrost 🇸🇬 919 54 3ms 18 Nov 2025 386th JayXon 🇺🇸 919 54 4ms 19 Nov 2025 386th sean-niemann 🇺🇸 919 54 3ms 19 Nov 2025 386th pardouin 🇫🇷 919 54 3ms 19 Nov 2025 390th ovs-code 🇩🇪 919 55 96ms 12 Sep 2024 390th GrayJoKing 🇦🇺 919 55 69ms 13 Sep 2024 390th Kacarott 🇦🇺 919 55 72ms 13 Sep 2024 390th error256 919 55 70ms 13 Sep 2024 390th pardouin 🇫🇷 919 55 66ms 13 Sep 2024 390th dokutan 919 55 68ms 13 Sep 2024 390th edsrzf 🇳🇿 919 55 78ms 26 Sep 2024 390th Shanethegamer 🇺🇸 919 55 71ms 23 Nov 2024 390th primo-ppcg 🇹🇭 919 55 67ms 5 Apr 2025 390th MeWhenI 🇻🇦 919 55 70ms 5 Apr 2025 390th sean-niemann 🇺🇸 919 55 65ms 7 Apr 2025 First Prev 321–400 of 2,465 Next Last