The Calendar hole will go live in approximately 5 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 641st GrayJoKing 🇦🇺 889 53 38ms 1 Mar 2023 642nd MeWhenI 🇻🇦 888 48 8ms 16 Dec 2024 643rd btnlq 887 38 4ms 26 Sep 2024 644th JPRuskin 🇬🇧 886 31 233ms 30 Apr 2024 645th rucin93 🇵🇱 886 39 707ms 29 Aug 2025 646th Yewzir 🇧🇪 886 48 2ms 18 Nov 2023 646th NickTheEASDude 🇺🇸 886 48 2ms 1 Feb 2024 646th snoozingnewt 🇨🇦 886 48 2ms 25 Oct 2025 649th Lydxn 🇨🇦 884 57 1,282ms 9 Sep 2022 650th primo-ppcg 🇹🇭 883 74 67ms 9 Sep 2022 651st albanian-laundromat 883 85 270ms 23 days ago 652nd ovs-code 🇩🇪 882 32 921ms 22 Apr 2024 652nd anter69 🇭🇺 882 32 864ms 10 Mar 2025 654th canissimia 🇦🇶 882 135 30ms 16 Nov 2023 655th Lydxn 🇨🇦 881 85 2ms 20 Jul 2023 656th Steffan153 🇫🇮 880 30 3ms 6 Mar 2023 656th saito-ta 🇯🇵 880 30 3ms 20 Aug 2025 658th rucin93 🇵🇱 879 54 2ms 19 Jun 2023 658th biocommando 🇫🇮 879 54 3ms 19 Aug 2023 658th DialFrost 🇸🇬 879 54 264ms 18 Dec 2024 661st JayXon 🇺🇸 879 62 73ms 20 Mar 2023 662nd 4hg 🇺🇸 877 41 67ms 14 Sep 2023 663rd ovs-code 🇩🇪 876 57 118ms 17 Nov 2023 664th scpchicken 🇵🇼 875 16 4ms 10 Mar 2023 664th emgordon154 875 16 3ms 17 Sep 2025 666th MeWhenI 🇻🇦 874 62 18ms 6 May 2023 667th Bubbler-4 874 65 126ms 6 Sep 2022 667th xnor-gate 874 65 126ms 21 Oct 2022 667th andersk 🇺🇸 874 65 120ms 25 Oct 2022 667th kgodara 874 65 117ms 6 Mar 2023 667th elgan65536 874 65 120ms 7 Mar 2024 667th DialFrost 🇸🇬 874 65 119ms 4 Apr 2025 667th acotis 874 65 117ms 6 Apr 2025 667th pardouin 🇫🇷 874 65 119ms 17 Apr 2025 667th emgordon154 874 65 126ms 18 Apr 2025 667th ovs-code 🇩🇪 874 65 119ms 20 Apr 2025 667th stefangimmillaro 874 65 124ms 4 Jun 2025 667th sean-niemann 🇺🇸 874 65 122ms 4 Jun 2025 667th fuzzylojik-golf 🇺🇸 874 65 120ms 28 Aug 2025 680th canissimia 🇦🇶 874 94 47ms 21 May 2023 681st sean-niemann 🇺🇸 873 50 2ms 8 Oct 2024 682nd JayXon 🇺🇸 873 54 37ms 8 Sep 2022 683rd emgordon154 873 79 102ms 20 days ago 683rd GolfingSuccess 🇬🇷 873 79 101ms 20 days ago 685th janbehrens 🇩🇪 873 86 271ms 7 Sep 2022 686th ovs-code 🇩🇪 872 41 63ms 13 days ago 687th MeWhenI 🇻🇦 872 75 56ms 6 Sep 2022 687th jared-hughes 872 75 48ms 8 Sep 2022 687th Alex-x90 🇺🇸 872 75 58ms 9 Sep 2022 687th BlankSpruce 872 75 55ms 14 Sep 2022 687th janbehrens 🇩🇪 872 75 51ms 20 Nov 2022 687th Irratix 🇳🇱 872 75 52ms 15 Dec 2022 687th DialFrost 🇸🇬 872 75 53ms 1 Sep 2023 687th Yewzir 🇧🇪 872 75 60ms 14 Oct 2023 687th Betuaredead 872 75 58ms 12 Nov 2023 687th Mandrzejy 🇵🇱 872 75 49ms 17 Apr 2024 687th luuumine 🇫🇷 872 75 58ms 8 Nov 2025 698th JayXon 🇺🇸 872 119 1,820ms 14 Sep 2025 698th emgordon154 872 119 2,093ms 2 days ago 700th rucin93 🇵🇱 871 45 5ms 4 Jul 2023 700th sisyphus-ppcg 🇦🇺 871 45 5ms 23 Nov 2023 700th targrik 871 45 5ms 31 Oct 2025 703rd HPWiz 🇳🇿 870 21 2ms 22 Feb 2025 704th KatieLG 🇬🇧 870 43 9ms 21 Oct 2022 704th Maznek 870 43 9ms 17 Sep 2023 704th MWI-polygolf 870 43 9ms 6 Dec 2023 707th smw5qz 870 46 10ms 9 Sep 2022 707th gXLg 🇩🇪 870 46 10ms 21 Oct 2022 707th SniperSmiley 🇺🇸 870 46 17ms 13 Dec 2022 707th TaserTheFox 🇺🇸 870 46 10ms 9 Jan 2023 707th SirFireball3521 870 46 10ms 4 Feb 2023 707th AlexanderFair 870 46 10ms 12 Jul 2023 707th ListeriaM 870 46 9ms 25 Aug 2023 707th retrohun 870 46 10ms 29 Mar 2024 707th elgan65536 870 46 10ms 30 Mar 2024 707th wuzekai518 870 46 10ms 18 Jun 2024 707th Bulmenisaurus 870 46 9ms 8 Jul 2024 707th lifthrasiir 🇰🇷 870 46 10ms 14 Nov 2024 707th qpwoeirut 870 46 10ms 13 Aug 2025 720th primo-ppcg 🇹🇭 870 154 12ms 13 Aug 2025 First Prev 641–720 of 2,752 Next Last