The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Evil Numbers (Long) 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 472nd nwellnhof 🇩🇪 912 41 9ms 11 Sep 2022 472nd stefangimmillaro 912 41 9ms 29 Oct 2022 472nd ovs-code 🇩🇪 912 41 9ms 11 Jan 2023 472nd AlephSquirrel 912 41 9ms 15 Feb 2023 472nd nathanadams 🇳🇿 912 41 9ms 24 Mar 2023 472nd thisishowmymindworks 🇳🇴 912 41 10ms 16 May 2023 472nd tayloia 🇬🇧 912 41 9ms 17 May 2023 472nd Yewzir 🇧🇪 912 41 9ms 14 Oct 2023 472nd commandblockguy 🇺🇸 912 41 356ms 15 Jan 2024 472nd SirBogman 🇺🇸 912 41 359ms 15 Jan 2024 472nd GrayJoKing 🇦🇺 912 41 338ms 15 Jan 2024 472nd GolfingSuccess 🇬🇷 912 41 341ms 15 Jan 2024 472nd KatieLG 🇬🇧 912 41 334ms 16 Jan 2024 472nd neel11235813 912 41 360ms 16 Jan 2024 472nd AlephSquirrel 912 41 336ms 16 Jan 2024 472nd BREMAUCY 🇫🇷 912 41 350ms 25 Jan 2024 472nd m42km 912 41 377ms 4 Feb 2024 472nd voytxt 🇨🇿 912 41 8ms 4 Feb 2024 472nd two-bad 🇬🇧 912 41 8ms 5 Feb 2024 472nd helbling 🇨🇭 912 41 9ms 10 Mar 2024 472nd duckyluuk 🇳🇱 912 41 376ms 27 Mar 2024 472nd MeWhenI 🇻🇦 912 41 359ms 24 May 2024 472nd vlpx 🇫🇮 912 41 9ms 1 Aug 2024 472nd emgordon154 912 41 364ms 16 Nov 2024 472nd emgordon154 912 41 9ms 16 Nov 2024 472nd targrik 912 41 8ms 14 Feb 2025 472nd xsot 🇸🇬 912 41 9ms 31 Jul 2025 472nd fuzzylojik-golf 🇺🇸 912 41 10ms 6 Aug 2025 472nd snoozingnewt 🇨🇦 912 41 342ms 25 Oct 2025 472nd sean-niemann 🇺🇸 912 41 2ms 18 Nov 2025 472nd rucin93 🇵🇱 912 41 2ms 18 Nov 2025 512th sean-niemann 🇺🇸 912 43 5ms 14 Apr 2024 512th Steffan153 🇫🇮 912 43 4ms 26 Jul 2024 512th xsot 🇸🇬 912 43 4ms 29 Jul 2025 515th Shanethegamer 🇺🇸 911 31 918ms 6 Sep 2022 515th SirBogman 🇺🇸 911 31 985ms 7 Sep 2022 515th primo-ppcg 🇹🇭 911 31 1,001ms 9 Sep 2022 515th inventshah 911 31 1,007ms 27 Sep 2023 515th Yewzir 🇧🇪 911 31 1,050ms 7 Feb 2024 515th edsrzf 🇳🇿 911 31 954ms 17 Jan 2025 515th snoozingnewt 🇨🇦 911 31 851ms 7 days ago 522nd emgordon154 911 37 5ms 6 Jun 2025 523rd emgordon154 911 46 3,550ms 6 Nov 2024 523rd JayXon 🇺🇸 911 46 3,459ms 7 Nov 2024 525th Lydxn 🇨🇦 911 48 145ms 20 Nov 2022 525th JayXon 🇺🇸 911 48 145ms 21 Nov 2022 527th DialFrost 🇸🇬 910 38 669ms 29 Aug 2025 527th sean-niemann 🇺🇸 910 38 661ms 12 Sep 2025 529th JayXon 🇺🇸 909 44 94ms 13 Jun 2023 529th Lydxn 🇨🇦 909 44 93ms 15 Jun 2023 529th sean-niemann 🇺🇸 909 44 103ms 14 Nov 2023 529th Steffan153 🇫🇮 909 44 95ms 13 Mar 2024 529th fuzzylojik-golf 🇺🇸 909 44 92ms 29 Aug 2025 534th JayXon 🇺🇸 909 48 2ms 10 Sep 2022 534th Lydxn 🇨🇦 909 48 2ms 12 Oct 2022 536th HPWiz 🇳🇿 908 38 22ms 6 Oct 2022 537th emgordon154 908 72 72ms 3 days ago 538th Waffle3z 907 47 2ms 6 Sep 2022 538th GrayJoKing 🇦🇺 907 47 2ms 7 Sep 2022 538th jared-hughes 907 47 2ms 8 Sep 2022 538th MeWhenI 🇻🇦 907 47 2ms 7 Nov 2022 538th Steffan153 🇫🇮 907 47 2ms 10 Dec 2022 538th btnlq 907 47 2ms 28 Dec 2022 538th sean-niemann 🇺🇸 907 47 2ms 24 Jul 2023 538th FlyingPenguin223 907 47 2ms 23 Oct 2024 538th fuzzylojik-golf 🇺🇸 907 47 2ms 1 Jul 2025 538th synt7x 🇺🇸 907 47 2ms 7 Jul 2025 538th GolfingSuccess 🇬🇷 907 47 2ms 24 Sep 2025 549th Lydxn 🇨🇦 906 52 36ms 1 Mar 2023 550th ovs-code 🇩🇪 904 57 4ms 26 Sep 2022 550th GrayJoKing 🇦🇺 904 57 3ms 29 Sep 2022 550th MeWhenI 🇻🇦 904 57 3ms 1 Oct 2022 550th Lydxn 🇨🇦 904 57 3ms 29 Jan 2023 550th Steffan153 🇫🇮 904 57 4ms 29 Jan 2023 550th DialFrost 🇸🇬 904 57 4ms 30 Jan 2023 550th sean-niemann 🇺🇸 904 57 4ms 23 Oct 2023 550th xsot 🇸🇬 904 57 4ms 9 Feb 2024 550th Yewzir 🇧🇪 904 57 3ms 29 Mar 2024 550th edsrzf 🇳🇿 904 57 4ms 8 Nov 2025 560th m-tkach 🇺🇦 904 65 24ms 6 Sep 2022 First Prev 481–560 of 2,756 Next Last