The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Niven Numbers (Long) in Python 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 395th GeneralFabian 676 74 16ms 12 Dec 2024 395th robin-scragg 676 74 17ms 22 May 2025 395th webmiche 676 74 19ms 3 Nov 2025 404th NerdyMcNerd42 667 75 16ms 13 Aug 2022 404th mrmena 🇦🇺 667 75 17ms 23 Mar 2024 404th EvyGithub 667 75 18ms 14 May 2024 407th 104210 658 76 18ms 17 Aug 2022 407th brimstonetrader 658 76 17ms 6 Jan 2024 407th Bit125 658 76 17ms 25 Jan 2024 407th yuchuehw 658 76 18ms 13 Feb 2024 407th XioR112 🇵🇱 658 76 16ms 17 Apr 2024 407th WCScrypto-official 658 76 18ms 21 Dec 2024 407th AstroOrbis 658 76 23ms 15 Jun 2025 407th PotatoSaladOverlord 658 76 21ms 20 Jun 2025 407th TheAtrossian 658 76 18ms 17 days ago 416th Liastrae 649 77 16ms 22 Aug 2022 416th EthanGrant1 649 77 16ms 31 Aug 2022 416th jstechman 649 77 17ms 6 Mar 2024 416th TeddyWoodburn 649 77 16ms 6 Oct 2024 416th strogor 649 77 16ms 11 Jun 2025 416th Hyperoplex145 649 77 16ms 15 days ago 422nd bwenstar 641 78 16ms 11 Aug 2022 422nd ThatAlo 641 78 22ms 25 Aug 2022 422nd NDR0216 🇹🇼 641 78 451ms 13 Feb 2023 422nd cingulataluke 641 78 15ms 29 Aug 2023 426th sagnik3 633 79 17ms 8 Aug 2022 426th atazzam 🇺🇸 633 79 16ms 17 Aug 2022 426th mobibluman 633 79 25ms 24 Aug 2022 426th dranjohn 633 79 15ms 11 Sep 2023 426th ztuned 633 79 393ms 23 Sep 2023 426th qwjhvbxi 633 79 13ms 7 Feb 2024 426th Mabeloid 🇳🇴 633 79 16ms 3 Oct 2024 433rd shinylego 625 80 13ms 14 Sep 2022 433rd zt14427 625 80 17ms 18 Nov 2023 433rd PyryL 🇫🇮 625 80 16ms 25 Aug 2024 436th grave367 617 81 14ms 5 Mar 2023 436th jrbud 617 81 17ms 7 Jan 2024 436th Selyss 617 81 16ms 9 Mar 2024 439th Import-Meow 610 82 17ms 29 Aug 2022 439th Anthony-Williams-06 610 82 16ms 1 Dec 2022 439th ko-umeja 610 82 20ms 4 Dec 2022 439th FernSch 610 82 17ms 22 Mar 2024 439th hetz2625 610 82 16ms 5 May 2025 444th grndng 602 83 17ms 23 Aug 2022 444th Very-Nerdy-Human 602 83 19ms 13 Jan 2024 446th seejaecee 581 86 14ms 7 Feb 2025 446th koweret 581 86 18ms 13 Sep 2025 448th UltimateGuy0987 568 88 17ms 14 Oct 2022 448th dylanjones92 568 88 16ms 22 Jan 2024 448th TheCod-r 🇦🇶 568 88 22ms 3 Aug 2024 448th hamilton-bonds 568 88 13ms 9 Sep 2024 452nd elephantpanda 562 89 13ms 10 Aug 2022 452nd 0dyse 562 89 1,501ms 28 Sep 2025 454th OleBrumm 549 91 15ms 22 Aug 2022 455th jlevis10 532 94 27ms 12 Oct 2023 455th gelvetica 532 94 21ms 18 Nov 2024 457th ze-h 🇺🇸 435 115 21ms 22 Aug 2022 458th ro011110ot 427 117 19ms 24 Aug 2025 459th kevinnaviapaiva 400 125 14ms 12 Feb 2025 460th StanicKlemen 388 129 16ms 9 Aug 2022 461st vallenrod 362 138 15ms 11 Aug 2022 461st StevenGoebl 362 138 17ms 2 Sep 2025 463rd AidanWalter 294 170 17ms 3 Jan 2025 464th Laellekoenig 279 179 13ms 7 Nov 2025 465th halmgillman 269 186 19ms 20 Feb 2024 466th JeromeChristopherJ 260 192 16ms 16 Sep 2023 467th Zhenyu-Bo 155 323 16ms 1 Aug 2025 468th retrohun 7 7,450 12ms 28 Dec 2022 468th kurkale6ka 7 7,450 12ms 7 days ago 470th KatieLG-Transpiler 🇬🇧 6 8,983 12ms 8 Aug 2022 First Prev 401–470 of 470