The Calendar hole will go live in approximately 12 days. Why not try and solve it ahead of time?
Pernicious Numbers in all languages in chars. 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 Chars Time Submitted 314th sean-niemann 🇺🇸 947 31 463ms 24 Oct 2023 314th alemelis 947 31 407ms 4 Oct 2024 314th twolfive 947 31 414ms 5 Oct 2024 324th Lydxn 🇨🇦 942 36 407ms 16 Jan 2024 324th Steffan153 🇫🇮 942 36 413ms 16 Jan 2024 324th kg583 🇺🇸 942 36 406ms 16 Jan 2024 324th JayXon 🇺🇸 942 36 389ms 16 Jan 2024 324th DialFrost 🇸🇬 942 36 402ms 16 Jan 2024 324th sisyphus-ppcg 🇦🇺 942 36 372ms 16 Jan 2024 324th sean-niemann 🇺🇸 942 36 355ms 17 Jan 2024 324th m-tkach 🇺🇦 942 36 402ms 22 Jan 2024 324th Yewzir 🇧🇪 942 36 434ms 28 Jan 2024 324th xsot 🇸🇬 942 36 404ms 29 Jan 2024 324th pardouin 🇫🇷 942 36 397ms 24 Jun 2024 324th MeWhenI 🇻🇦 942 36 388ms 13 Jul 2024 324th b-illy 🇬🇧 942 36 357ms 7 Sep 2024 324th emgordon154 942 36 458ms 18 Mar 2025 324th fuzzylojik-golf 🇺🇸 942 36 363ms 1 Jul 2025 324th ovs-code 🇩🇪 942 36 362ms 15 Jul 2025 324th Babafaba 942 36 412ms 23 days ago 341st jared-hughes 940 35 9ms 28 Feb 2022 341st m-tkach 🇺🇦 940 35 8ms 24 Feb 2023 341st AutoGPT-code-golfer 940 35 9ms 23 Apr 2023 341st emgordon154 940 35 9ms 20 Mar 2025 345th GrayJoKing 🇦🇺 939 41 1ms 9 Feb 2021 345th primo-ppcg 🇹🇭 939 41 1ms 9 Feb 2021 345th JayXon 🇺🇸 939 41 1ms 9 Feb 2021 345th prplz 🇦🇺 939 41 1ms 10 Feb 2021 345th sisyphus-ppcg 🇦🇺 939 41 1ms 10 Feb 2021 345th Waffle3z 939 41 1ms 10 Feb 2021 345th Lydxn 🇨🇦 939 41 1ms 10 Feb 2021 345th orthoplex 🇨🇽 939 41 1ms 12 Aug 2021 345th lynn 939 41 1ms 11 Sep 2021 345th jared-hughes 939 41 1ms 28 Feb 2022 345th m-tkach 🇺🇦 939 41 2ms 24 Oct 2022 345th MeWhenI 🇻🇦 939 41 2ms 5 Nov 2022 345th Steffan153 🇫🇮 939 41 1ms 26 Nov 2022 345th DialFrost 🇸🇬 939 41 1ms 12 Jan 2023 345th sean-niemann 🇺🇸 939 41 1ms 12 Jan 2023 345th Shanethegamer 🇺🇸 939 41 1ms 6 Feb 2023 345th xsot 🇸🇬 939 41 1ms 9 Oct 2023 345th Betuaredead 939 41 1ms 12 Nov 2023 345th Yewzir 🇧🇪 939 41 1ms 14 Nov 2023 345th dokutan 939 41 1ms 26 Mar 2024 345th pardouin 🇫🇷 939 41 1ms 21 Sep 2024 345th FlyingPenguin223 939 41 2ms 23 Oct 2024 345th fuzzylojik-golf 🇺🇸 939 41 2ms 3 Jul 2025 345th edsrzf 🇳🇿 939 41 1ms 22 Jul 2025 345th snoozingnewt 🇨🇦 939 41 2ms 16 days ago 370th Yewzir 🇧🇪 938 16 36ms 18 Feb 2024 370th emgordon154 938 16 57ms 19 Mar 2025 372nd GrayJoKing 🇦🇺 938 55 317ms 21 Nov 2021 372nd JayXon 🇺🇸 938 55 316ms 21 Nov 2021 372nd Lydxn 🇨🇦 938 55 319ms 21 Nov 2021 372nd lynn 938 55 319ms 21 Nov 2021 372nd NewDefectus 🇮🇱 938 55 320ms 21 Nov 2021 372nd primo-ppcg 🇹🇭 938 55 326ms 21 Nov 2021 372nd prplz 🇦🇺 938 55 321ms 21 Nov 2021 372nd sisyphus-ppcg 🇦🇺 938 55 322ms 21 Nov 2021 372nd inventshah 938 55 315ms 18 Jun 2022 372nd m-tkach 🇺🇦 938 55 320ms 26 Jun 2022 372nd sean-niemann 🇺🇸 938 55 368ms 3 Nov 2022 372nd stefangimmillaro 938 55 323ms 4 Nov 2022 372nd MeWhenI 🇻🇦 938 55 319ms 5 Nov 2022 372nd Steffan153 🇫🇮 938 55 324ms 26 Nov 2022 372nd annaproxy 938 55 312ms 8 Jan 2023 372nd DialFrost 🇸🇬 938 55 319ms 12 Jan 2023 372nd Shanethegamer 🇺🇸 938 55 322ms 6 Feb 2023 372nd btnlq 938 55 314ms 10 Mar 2023 372nd namelessiw 938 55 392ms 22 Jul 2023 372nd Yewzir 🇧🇪 938 55 321ms 11 Oct 2023 372nd AdrienHache 🇫🇷 938 55 313ms 21 Oct 2023 372nd Betuaredead 938 55 317ms 11 Nov 2023 372nd pardouin 🇫🇷 938 55 364ms 18 Aug 2024 372nd voytxt 🇨🇿 938 55 310ms 19 Jan 2025 372nd b-illy 🇬🇧 938 55 324ms 21 Jan 2025 372nd fuzzylojik-golf 🇺🇸 938 55 368ms 29 May 2025 372nd Yax42 🇫🇷 938 55 364ms 31 May 2025 372nd edsrzf 🇳🇿 938 55 352ms 22 Jul 2025 372nd CaedenHarper 🇨🇦 938 55 376ms 4 Sep 2025 First Prev 321–400 of 3,273 Next Last