The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Pernicious Numbers (Long) in Python 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 161st MaxElf999 750 68 17ms 21 Nov 2022 161st guilhem-roy 🇫🇷 750 68 16ms 21 Nov 2022 161st knutae 🇳🇴 750 68 18ms 30 Nov 2022 161st 4ndyJ 🇬🇧 750 68 16ms 10 Jan 2023 161st andre-lameirinhas 🇵🇹 750 68 17ms 18 May 2023 161st WillConker 750 68 20ms 16 Jul 2023 161st AforAmpere 750 68 16ms 20 Sep 2023 161st Simpos 750 68 30ms 24 Oct 2023 161st mikehanus 750 68 19ms 22 Nov 2023 161st chartung17 750 68 17ms 31 Dec 2023 161st mathisfun271 750 68 23ms 13 Feb 2024 161st 77Tigers 750 68 16ms 22 Jun 2024 161st moustave 750 68 17ms 12 Nov 2024 174th juliusgeo 739 69 16ms 13 Jan 2023 174th jhu04 739 69 19ms 18 Jan 2024 174th ImpressedByRocks 739 69 16ms 15 Nov 2024 177th jhpaques 🇫🇷 729 70 18ms 30 Nov 2022 177th michelebastione 🇮🇹 729 70 17ms 7 Dec 2022 177th Skwerl23 729 70 22ms 5 Feb 2023 177th celiendonze 🇨🇭 729 70 17ms 21 Apr 2023 177th epic-programmer-guy 729 70 17ms 20 Dec 2023 177th Stockoh 🇫🇷 729 70 267ms 24 Apr 2024 177th CutSandstone 729 70 16ms 5 Jul 2024 177th Andrey135296 729 70 16ms 25 Oct 2024 177th Emutis 🇱🇹 729 70 19ms 27 Oct 2024 186th Fishron 718 71 17ms 29 Nov 2022 186th Jacob385 718 71 19ms 18 Apr 2024 186th wobblybits 718 71 19ms 29 Aug 2025 189th mbittner20 708 72 17ms 27 May 2023 189th eiburns 708 72 19ms 27 Oct 2023 189th wh3n3v3r 🇨🇿 708 72 29ms 13 Nov 2024 189th WillowWispy 708 72 17ms 14 Mar 2025 193rd Anthony-Williams-06 689 74 17ms 12 Sep 2024 194th CedricGebistorf 680 75 24ms 4 May 2023 194th namelessiw 680 75 26ms 11 Jan 2024 194th robin-scragg 680 75 25ms 25 Jun 2025 197th jacksonhenry3 671 76 23ms 2 Dec 2022 197th Irratix 🇳🇱 671 76 23ms 31 Jan 2023 197th NoahBolohan 🇨🇦 671 76 27ms 8 Feb 2023 197th Andrey2001 671 76 23ms 9 days ago 201st Europe2048 654 78 32ms 4 Dec 2024 202nd 051 🇸🇬 638 80 20ms 26 Dec 2023 203rd btjones0 630 81 21ms 6 Dec 2022 203rd rollershutter 630 81 24ms 4 Jul 2023 203rd cingulataluke 630 81 21ms 29 Aug 2023 203rd Flekay 🇩🇪 630 81 21ms 10 Jul 2025 207th hiichbindermax 622 82 21ms 17 Feb 2023 207th scpchicken 🇵🇼 622 82 20ms 24 Feb 2023 207th bwenstar 622 82 27ms 21 Feb 2024 210th wuzekai518 607 84 29ms 19 Jul 2024 211th RandGuy 600 85 25ms 23 Nov 2022 211th neihousaigaai 600 85 23ms 11 Feb 2024 211th alemelis 600 85 21ms 13 Oct 2024 214th SniperSmiley 🇺🇸 593 86 19ms 17 May 2023 214th Nic0M 593 86 26ms 6 Jul 2024 214th Mabeloid 🇳🇴 593 86 20ms 3 Oct 2024 217th Vaekor 586 87 30ms 9 Jul 2023 217th RaBa21 🇭🇺 586 87 20ms 10 Jul 2025 219th jtaxen 580 88 28ms 22 Jun 2023 219th Pale-Vessel 580 88 23ms 18 May 2024 219th AtengChen 580 88 21ms 25 Aug 2024 219th taesungh 580 88 29ms 7 Jun 2025 223rd TheZwierzLF 🇵🇱 567 90 30ms 26 May 2025 223rd SectorCorruptor 567 90 29ms 25 Sep 2025 225th Mr-McChicken 560 91 23ms 4 Oct 2025 225th madeforlosers 560 91 26ms 11 Nov 2025 227th Techdude01 554 92 336ms 19 Dec 2022 228th FortuiteMan 🇫🇷 548 93 31ms 10 Oct 2024 229th mdnestor 543 94 21ms 23 Dec 2022 229th jfallon1997 543 94 23ms 4 Jan 2023 229th ThatAlo 543 94 27ms 13 Jun 2023 232nd PyryL 🇫🇮 537 95 33ms 27 Aug 2024 232nd AstroOrbis 537 95 29ms 16 Jul 2025 234th j-Ewan 531 96 34ms 9 Feb 2023 234th NoneTheFewer 531 96 36ms 18 May 2024 236th ridingqwerty 🇺🇸 526 97 24ms 2 Jan 2024 237th mstang107 520 98 39ms 20 Dec 2023 237th adoxography 520 98 33ms 1 Sep 2025 239th JesseNoEyes 🇺🇸 515 99 31ms 20 Oct 2024 240th twocatsinatrenchcoat 510 100 25ms 20 Nov 2022 First Prev 161–240 of 292 Next Last
