The Calendar hole will go live in approximately 8 days. Why not try and solve it ahead of time?
Evil Numbers 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 801st primo-ppcg 🇹🇭 903 40 6ms 9 Apr 2021 801st sisyphus-ppcg 🇦🇺 903 40 5ms 11 Jun 2021 801st emplv 🇱🇻 903 40 7ms 17 Aug 2022 801st targrik 903 40 7ms 9 hours ago 805th prplz 🇦🇺 903 73 77ms 1 Jan 2022 805th Irratix 🇳🇱 903 73 70ms 3 Jan 2022 805th inventshah 903 73 57ms 18 Jan 2022 805th MeWhenI 🇻🇦 903 73 71ms 8 May 2022 805th solmyr2000 903 73 65ms 20 Jun 2022 805th m-tkach 🇺🇦 903 73 74ms 26 Jun 2022 805th michael-pruglo 🇺🇦 903 73 55ms 13 Jul 2022 805th Alex-x90 🇺🇸 903 73 77ms 30 Jul 2022 805th jared-hughes 903 73 59ms 8 Sep 2022 805th janbehrens 🇩🇪 903 73 53ms 20 Nov 2022 805th Yewzir 🇧🇪 903 73 66ms 14 Oct 2023 805th Betuaredead 903 73 81ms 12 Nov 2023 805th Mandrzejy 🇵🇱 903 73 74ms 14 Apr 2024 805th pardouin 🇫🇷 903 73 78ms 23 Aug 2024 819th jared-hughes 901 57 8ms 20 Dec 2024 820th frankgraziano 901 107 10ms 11 Aug 2025 820th primo-ppcg 🇹🇭 901 107 11ms 13 Aug 2025 820th DialFrost 🇸🇬 901 107 10ms 13 Aug 2025 823rd andersk 🇺🇸 899 40 8ms 21 Mar 2020 823rd blueooooodle 899 40 9ms 11 Apr 2021 823rd jansekulowicz 899 40 9ms 24 Apr 2022 823rd steffan-polygolf 899 40 9ms 14 Feb 2024 823rd JOrE20 🇺🇸 899 40 9ms 10 days ago 828th emgordon154 898 62 389ms 25 Sep 2025 828th GolfingSuccess 🇬🇷 898 62 449ms 25 Sep 2025 828th nwellnhof 🇩🇪 898 62 426ms 25 Sep 2025 828th Yewzir 🇧🇪 898 62 416ms 2 Oct 2025 828th MeWhenI 🇻🇦 898 62 450ms 7 Nov 2025 833rd Steffan153 🇫🇮 898 63 26ms 6 Aug 2024 833rd Lydxn 🇨🇦 898 63 25ms 6 Aug 2024 833rd sean-niemann 🇺🇸 898 63 26ms 19 May 2025 836th primo-ppcg 🇹🇭 897 83 259ms 10 Oct 2020 836th sisyphus-ppcg 🇦🇺 897 83 265ms 14 Jun 2021 838th MeWhenI 🇻🇦 896 48 13ms 15 Nov 2021 838th HumanEquivalentUnit 896 48 12ms 4 Jan 2022 838th arjanadriaanse 🇳🇱 896 48 9ms 28 Sep 2023 838th Yewzir 🇧🇪 896 48 13ms 11 Nov 2023 842nd sisyphus-ppcg 🇦🇺 895 65 421ms 28 Feb 2022 842nd fuzzylojik-golf 🇺🇸 895 65 490ms 6 Aug 2025 844th primo-ppcg 🇹🇭 894 41 93ms 25 Dec 2020 844th MeWhenI 🇻🇦 894 41 83ms 5 Aug 2023 844th fuzzylojik-golf 🇺🇸 894 41 120ms 2 Sep 2025 847th Yewzir 🇧🇪 894 49 6ms 11 Dec 2023 848th UnderKoen 🇳🇱 894 59 1ms 5 Jul 2022 848th sisyphus-ppcg 🇦🇺 894 59 1ms 7 Jul 2022 848th m-tkach 🇺🇦 894 59 1ms 8 Mar 2023 848th Shanethegamer 🇺🇸 894 59 121ms 22 Mar 2023 848th orthoplex 🇨🇽 894 59 1ms 29 Jun 2023 848th elgan65536 894 59 119ms 4 Apr 2024 854th kmaork 🇮🇱 893 44 9ms 18 Apr 2018 854th stevelamm 893 44 9ms 4 Oct 2018 854th hirosuzuki 893 44 9ms 1 Mar 2019 854th sk- 893 44 9ms 11 Sep 2019 854th urojony 🇵🇱 893 44 9ms 26 Dec 2020 854th Indivicivet 893 44 9ms 26 Oct 2021 854th dzshn 893 44 9ms 24 Aug 2022 854th smartiel 893 44 9ms 21 Sep 2022 854th FlorianCassayre 🇫🇷 893 44 10ms 6 Nov 2022 854th TaserTheFox 🇺🇸 893 44 9ms 9 Jan 2023 854th AlexanderFair 893 44 9ms 2 Jul 2023 854th janeclange 893 44 9ms 13 Nov 2023 854th namelessiw 893 44 9ms 10 Jan 2024 854th Anonymousellama21 893 44 9ms 14 Mar 2024 854th elgan65536 893 44 9ms 4 Apr 2024 854th wuzekai518 893 44 9ms 17 Jun 2024 854th lifthrasiir 🇰🇷 893 44 9ms 12 Nov 2024 854th dirckvdende 893 44 9ms 23 Jul 2025 854th janlelis 893 44 9ms 16 Aug 2025 873rd btnlq 893 45 2ms 12 Sep 2022 873rd sisyphus-ppcg 🇦🇺 893 45 2ms 23 Mar 2023 873rd fuzzylojik-golf 🇺🇸 893 45 6ms 4 Sep 2025 876th sisyphus-ppcg 🇦🇺 891 40 2ms 10 Jun 2021 876th lynn 891 40 2ms 18 Nov 2021 876th steffan-polygolf 891 40 2ms 24 Feb 2023 876th xsot 🇸🇬 891 40 2ms 21 Oct 2023 876th synt7x 🇺🇸 891 40 2ms 14 Jul 2025 First Prev 801–880 of 5,026 Next Last