The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Evil Numbers 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 134th AdrienHache 🇫🇷 976 41 16ms 20 hours ago 242nd marcin7Cd 952 42 9ms 3 Sep 2019 242nd ZakkkkAttackkkk 🇵🇭 952 42 9ms 27 Jul 2022 242nd OhmNomNom 952 42 9ms 30 Oct 2022 242nd bob-th 952 42 9ms 14 Feb 2023 246th stu303 930 43 9ms 30 Dec 2020 246th Krtecik 930 43 10ms 9 Feb 2024 246th alemelis 930 43 9ms 13 Sep 2024 246th Lv0Sys 🇵🇱 930 43 10ms 20 days ago 250th kmaork 🇮🇱 909 44 9ms 18 Apr 2018 250th stevelamm 909 44 9ms 4 Oct 2018 250th hirosuzuki 909 44 9ms 1 Mar 2019 250th sk- 909 44 9ms 11 Sep 2019 250th urojony 🇵🇱 909 44 9ms 26 Dec 2020 250th Indivicivet 909 44 9ms 26 Oct 2021 250th dzshn 909 44 9ms 24 Aug 2022 250th smartiel 909 44 9ms 21 Sep 2022 250th FlorianCassayre 🇫🇷 909 44 10ms 6 Nov 2022 250th TaserTheFox 🇺🇸 909 44 9ms 9 Jan 2023 250th AlexanderFair 909 44 9ms 2 Jul 2023 250th janeclange 909 44 9ms 13 Nov 2023 250th namelessiw 909 44 9ms 10 Jan 2024 250th Anonymousellama21 909 44 9ms 14 Mar 2024 250th elgan65536 909 44 9ms 4 Apr 2024 250th wuzekai518 909 44 9ms 17 Jun 2024 250th lifthrasiir 🇰🇷 909 44 9ms 12 Nov 2024 250th dirckvdende 909 44 9ms 23 Jul 2025 250th janlelis 909 44 9ms 16 Aug 2025 269th AgathokakologicalBit 889 45 9ms 19 Jul 2019 269th face0xff 889 45 15ms 26 Nov 2021 269th RDShah 889 45 17ms 12 Jun 2022 269th tri1212 🇻🇳 889 45 18ms 21 Jul 2022 269th vhoulbreque 🇫🇷 889 45 15ms 13 Aug 2022 269th Andriamanitra 🇫🇮 889 45 16ms 22 Sep 2022 269th gXLg 🇩🇪 889 45 9ms 22 Oct 2022 269th SniperSmiley 🇺🇸 889 45 10ms 13 Dec 2022 269th b10011 🇫🇮 889 45 8ms 13 Jan 2023 269th Ripick 889 45 16ms 1 Feb 2023 269th SirFireball3521 889 45 9ms 4 Feb 2023 269th quimey 889 45 15ms 22 Mar 2023 269th rollershutter 889 45 15ms 25 Apr 2023 269th celiendonze 🇨🇭 889 45 15ms 4 Jul 2023 269th cros107 🇦🇺 889 45 16ms 14 Aug 2023 269th yourlefthandman 889 45 16ms 15 Aug 2023 269th PatrickStephansen 🇿🇦 889 45 9ms 23 Aug 2023 269th ListeriaM 889 45 9ms 25 Aug 2023 269th dteague3989 889 45 9ms 26 Oct 2023 269th boboquack 889 45 16ms 18 Nov 2023 269th Dataen 889 45 15ms 12 Jan 2024 269th NickTheEASDude 🇺🇸 889 45 15ms 1 Feb 2024 269th LlamaLad7 🇬🇧 889 45 10ms 9 Feb 2024 269th retrohun 889 45 9ms 29 Mar 2024 269th starfihs 889 45 9ms 2 Aug 2024 269th jatloe 889 45 16ms 24 Aug 2024 269th jamiloBBKing 889 45 15ms 27 Jan 2025 269th jamesthekee 889 45 15ms 27 Jan 2025 269th IsaacAlexBarden 889 45 16ms 6 Feb 2025 269th Languag3 889 45 15ms 6 Mar 2025 269th souta-1326 889 45 14ms 23 Mar 2025 269th H3XDaemon 889 45 16ms 19 Aug 2025 269th wobblybits 889 45 15ms 29 Aug 2025 269th EthanJantz 889 45 16ms 29 Aug 2025 269th not-a-pokemon 889 45 15ms 10 Sep 2025 269th mishak-sys 889 45 16ms 10 Sep 2025 269th tommasotode 889 45 16ms 20 Sep 2025 269th Daniel-Ellison 889 45 15ms 2 Oct 2025 269th solisolu 889 45 9ms 22 days ago 269th JOrE20 🇺🇸 889 45 9ms 5 days ago 309th MACwayne 870 46 9ms 1 Aug 2019 309th MinorLegato 🇸🇪 870 46 9ms 28 Apr 2022 309th aonkeeper4 870 46 9ms 3 Jul 2022 309th Eilonlif 🇮🇱 870 46 9ms 26 Aug 2022 309th AodhanDalton 870 46 10ms 2 Sep 2022 309th suwat513 870 46 9ms 13 Sep 2022 309th 5quiwyrm 870 46 9ms 21 Sep 2022 309th 4hg 🇺🇸 870 46 9ms 3 Oct 2022 309th jakobkordez 🇸🇮 870 46 9ms 15 Oct 2022 309th mousetail 🇳🇱 870 46 9ms 3 Nov 2022 309th cefqrn 870 46 9ms 20 Dec 2022 309th gareth-kmet 870 46 9ms 2 Mar 2023 First Prev 241–320 of 1,291 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