The Calendar hole will go live in approximately 11 days. Why not try and solve it ahead of time?
Evil Numbers in C# 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 81st tbschff 621 87 416ms 15 Apr 2022 81st hamhub7 621 87 416ms 4 Aug 2022 81st ElysiaVesper 621 87 351ms 19 Nov 2023 81st markcahigyan 🇭🇺 621 87 357ms 7 Feb 2024 81st Decrare 621 87 335ms 17 Sep 2025 86th petroselo 614 88 354ms 21 Nov 2021 86th ChrisTheisen 614 88 407ms 14 Dec 2022 86th PaulMWeiser 614 88 396ms 27 Feb 2023 86th malworthy 614 88 399ms 23 Oct 2023 86th HumanoidCPU 614 88 364ms 24 Aug 2024 86th CaedenHarper 🇨🇦 614 88 320ms 23 Jan 2025 86th amazingalek 614 88 503ms 26 mins ago 93rd Hankinabag 607 89 335ms 21 Nov 2021 93rd Meowsan91 🇨🇿 607 89 370ms 21 Nov 2021 93rd castur1 607 89 371ms 3 Feb 2022 93rd Mikey-Beep 🇬🇧 607 89 406ms 3 Sep 2024 97th aplato 600 90 370ms 21 Nov 2021 97th afgarciam 600 90 391ms 21 Nov 2021 97th HassanAliKadhem 🇧🇭 600 90 387ms 18 Jan 2022 97th Ripick 600 90 344ms 18 Apr 2023 101st sm1lko 593 91 395ms 26 Oct 2022 102nd kmathis22 587 92 365ms 26 Sep 2025 103rd RoscoeDaWah 🇬🇧 581 93 399ms 14 Jun 2022 103rd eshilo-draper 581 93 382ms 8 Sep 2022 103rd Alex-Huggett 🇬🇧 581 93 418ms 13 Apr 2024 106th joelgduggan 568 95 370ms 21 Nov 2021 106th hippopotam00sehead 🇨🇦 568 95 381ms 11 Sep 2024 108th centrolutions 563 96 372ms 24 Nov 2022 108th TRexOnGit 563 96 389ms 28 Nov 2024 110th Soyo-Wind 557 97 389ms 8 Nov 2025 111th TheMickeyMouse 551 98 361ms 21 Nov 2021 111th mrmena 🇦🇺 551 98 346ms 21 Nov 2021 111th yannikHoeflich 551 98 364ms 21 Nov 2021 111th msbranicky 551 98 361ms 20 Aug 2023 115th PsychoTea 540 100 376ms 21 Nov 2021 115th Mezzofloat 540 100 382ms 26 Oct 2024 117th od86 535 101 359ms 12 Nov 2025 118th muztanger 524 103 373ms 21 Nov 2021 118th liviucerchez 524 103 381ms 23 Oct 2023 120th JayantaNath 519 104 386ms 15 Apr 2022 121st TheKPAXian 509 106 361ms 21 Nov 2021 122nd brandon-04 505 107 380ms 12 Nov 2025 123rd mokymok 🇺🇸 486 111 346ms 21 Nov 2021 123rd xkacer 🇨🇿 486 111 318ms 21 Nov 2021 123rd TimJackMaster 486 111 364ms 16 Feb 2023 123rd Schmitt-Very-Cool 486 111 375ms 31 Jul 2023 123rd Mabeloid 🇳🇴 486 111 357ms 17 Sep 2024 123rd anter69 🇭🇺 486 111 356ms 18 Sep 2024 129th retrohun 470 115 363ms 21 Nov 2021 129th MLPdiscord 470 115 384ms 6 Jan 2022 129th KatieLG-Transpiler 🇬🇧 470 115 351ms 23 Jun 2022 129th GolfingSuccess 🇬🇷 470 115 353ms 15 Aug 2025 133rd wescombs10 462 117 387ms 29 Oct 2022 133rd kevinnaviapaiva 462 117 323ms 28 Feb 2025 135th carlpeter 454 119 373ms 4 Sep 2023 136th MiffOttah 450 120 359ms 21 Nov 2021 136th ericbreyer 450 120 362ms 6 Apr 2022 138th Pyro569 432 125 383ms 20 Jul 2023 139th Jennifervl 🇸🇪 412 131 364ms 11 Dec 2021 140th Cool-Ari 312 173 374ms 8 Aug 2022 141st DaCuteRaccoon 295 183 398ms 8 Apr 2022 142nd heathlarsen 240 225 386ms 6 Apr 2023 143rd TonyProxy 87 619 363ms 21 Nov 2021 144th BharadwajSridharan 🇮🇳 29 1,843 398ms 21 Nov 2021 First Prev 81–144 of 144
