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 640th NickTheEASDude 🇺🇸 888 48 2ms 1 Feb 2024 640th MeWhenI 🇻🇦 888 48 8ms 16 Dec 2024 640th snoozingnewt 🇨🇦 888 48 2ms 25 Oct 2025 644th btnlq 887 38 4ms 26 Sep 2024 645th JPRuskin 🇬🇧 886 31 254ms 30 Apr 2024 646th rucin93 🇵🇱 886 39 707ms 29 Aug 2025 647th Lydxn 🇨🇦 884 57 1,282ms 9 Sep 2022 648th primo-ppcg 🇹🇭 883 74 84ms 9 Sep 2022 649th albanian-laundromat 883 85 270ms 15 days ago 650th ovs-code 🇩🇪 882 32 921ms 22 Apr 2024 650th anter69 🇭🇺 882 32 864ms 10 Mar 2025 652nd canissimia 🇦🇶 882 135 30ms 16 Nov 2023 653rd Lydxn 🇨🇦 881 85 2ms 20 Jul 2023 654th Steffan153 🇫🇮 880 30 3ms 6 Mar 2023 654th saito-ta 🇯🇵 880 30 3ms 20 Aug 2025 656th rucin93 🇵🇱 879 54 2ms 19 Jun 2023 656th biocommando 🇫🇮 879 54 3ms 19 Aug 2023 656th DialFrost 🇸🇬 879 54 264ms 18 Dec 2024 659th JayXon 🇺🇸 879 62 73ms 20 Mar 2023 660th 4hg 🇺🇸 877 41 70ms 14 Sep 2023 661st ovs-code 🇩🇪 876 57 118ms 17 Nov 2023 662nd scpchicken 🇵🇼 875 16 4ms 10 Mar 2023 662nd emgordon154 875 16 3ms 17 Sep 2025 664th MeWhenI 🇻🇦 874 62 18ms 6 May 2023 665th Bubbler-4 874 65 126ms 6 Sep 2022 665th xnor-gate 874 65 126ms 21 Oct 2022 665th andersk 🇺🇸 874 65 120ms 25 Oct 2022 665th kgodara 874 65 121ms 6 Mar 2023 665th elgan65536 874 65 120ms 7 Mar 2024 665th DialFrost 🇸🇬 874 65 119ms 4 Apr 2025 665th acotis 874 65 117ms 6 Apr 2025 665th pardouin 🇫🇷 874 65 119ms 17 Apr 2025 665th emgordon154 874 65 126ms 18 Apr 2025 665th ovs-code 🇩🇪 874 65 119ms 20 Apr 2025 665th stefangimmillaro 874 65 124ms 4 Jun 2025 665th sean-niemann 🇺🇸 874 65 122ms 4 Jun 2025 665th fuzzylojik-golf 🇺🇸 874 65 120ms 28 Aug 2025 678th canissimia 🇦🇶 874 94 47ms 21 May 2023 679th sean-niemann 🇺🇸 873 50 2ms 8 Oct 2024 680th JayXon 🇺🇸 873 54 37ms 8 Sep 2022 681st emgordon154 873 79 102ms 12 days ago 681st GolfingSuccess 🇬🇷 873 79 101ms 12 days ago 683rd janbehrens 🇩🇪 873 86 271ms 7 Sep 2022 684th ovs-code 🇩🇪 872 41 63ms 4 days ago 685th MeWhenI 🇻🇦 872 75 58ms 6 Sep 2022 685th jared-hughes 872 75 48ms 8 Sep 2022 685th Alex-x90 🇺🇸 872 75 73ms 9 Sep 2022 685th BlankSpruce 872 75 61ms 14 Sep 2022 685th janbehrens 🇩🇪 872 75 51ms 20 Nov 2022 685th Irratix 🇳🇱 872 75 52ms 15 Dec 2022 685th DialFrost 🇸🇬 872 75 53ms 1 Sep 2023 685th Yewzir 🇧🇪 872 75 84ms 14 Oct 2023 685th Betuaredead 872 75 66ms 12 Nov 2023 685th Mandrzejy 🇵🇱 872 75 49ms 17 Apr 2024 685th luuumine 🇫🇷 872 75 83ms 8 Nov 2025 696th JayXon 🇺🇸 872 119 1,820ms 14 Sep 2025 697th rucin93 🇵🇱 871 45 5ms 4 Jul 2023 697th sisyphus-ppcg 🇦🇺 871 45 5ms 23 Nov 2023 697th targrik 871 45 5ms 31 Oct 2025 700th HPWiz 🇳🇿 870 21 2ms 22 Feb 2025 701st KatieLG 🇬🇧 870 43 9ms 21 Oct 2022 701st Maznek 870 43 9ms 17 Sep 2023 701st MWI-polygolf 870 43 9ms 6 Dec 2023 704th smw5qz 870 46 10ms 9 Sep 2022 704th gXLg 🇩🇪 870 46 10ms 21 Oct 2022 704th SniperSmiley 🇺🇸 870 46 17ms 13 Dec 2022 704th TaserTheFox 🇺🇸 870 46 10ms 9 Jan 2023 704th SirFireball3521 870 46 10ms 4 Feb 2023 704th AlexanderFair 870 46 10ms 12 Jul 2023 704th ListeriaM 870 46 9ms 25 Aug 2023 704th retrohun 870 46 10ms 29 Mar 2024 704th elgan65536 870 46 10ms 30 Mar 2024 704th wuzekai518 870 46 10ms 18 Jun 2024 704th Bulmenisaurus 870 46 9ms 8 Jul 2024 704th lifthrasiir 🇰🇷 870 46 10ms 14 Nov 2024 704th qpwoeirut 870 46 10ms 13 Aug 2025 717th steffan-polygolf 870 49 2ms 23 Feb 2023 717th MWI-polygolf 870 49 2ms 29 Dec 2023 719th primo-ppcg 🇹🇭 870 154 12ms 13 Aug 2025 720th Steffan153 🇫🇮 869 58 1,287ms 3 Jan 2023 First Prev 641–720 of 2,756 Next Last