The Calendar hole will go live in approximately 13 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 312th twolfive 947 31 414ms 5 Oct 2024 322nd Lydxn 🇨🇦 942 36 407ms 16 Jan 2024 322nd Steffan153 🇫🇮 942 36 413ms 16 Jan 2024 322nd kg583 🇺🇸 942 36 406ms 16 Jan 2024 322nd JayXon 🇺🇸 942 36 389ms 16 Jan 2024 322nd DialFrost 🇸🇬 942 36 402ms 16 Jan 2024 322nd sisyphus-ppcg 🇦🇺 942 36 372ms 16 Jan 2024 322nd sean-niemann 🇺🇸 942 36 355ms 17 Jan 2024 322nd m-tkach 🇺🇦 942 36 402ms 22 Jan 2024 322nd Yewzir 🇧🇪 942 36 434ms 28 Jan 2024 322nd xsot 🇸🇬 942 36 404ms 29 Jan 2024 322nd pardouin 🇫🇷 942 36 397ms 24 Jun 2024 322nd MeWhenI 🇻🇦 942 36 388ms 13 Jul 2024 322nd b-illy 🇬🇧 942 36 357ms 7 Sep 2024 322nd emgordon154 942 36 458ms 18 Mar 2025 322nd fuzzylojik-golf 🇺🇸 942 36 363ms 1 Jul 2025 322nd ovs-code 🇩🇪 942 36 362ms 15 Jul 2025 322nd Babafaba 942 36 412ms 21 days ago 339th jared-hughes 940 35 9ms 28 Feb 2022 339th m-tkach 🇺🇦 940 35 8ms 24 Feb 2023 339th AutoGPT-code-golfer 940 35 9ms 23 Apr 2023 339th emgordon154 940 35 9ms 20 Mar 2025 343rd GrayJoKing 🇦🇺 939 41 1ms 9 Feb 2021 343rd primo-ppcg 🇹🇭 939 41 1ms 9 Feb 2021 343rd JayXon 🇺🇸 939 41 1ms 9 Feb 2021 343rd prplz 🇦🇺 939 41 1ms 10 Feb 2021 343rd sisyphus-ppcg 🇦🇺 939 41 1ms 10 Feb 2021 343rd Waffle3z 939 41 1ms 10 Feb 2021 343rd Lydxn 🇨🇦 939 41 1ms 10 Feb 2021 343rd orthoplex 🇨🇽 939 41 1ms 12 Aug 2021 343rd lynn 939 41 1ms 11 Sep 2021 343rd jared-hughes 939 41 1ms 28 Feb 2022 343rd m-tkach 🇺🇦 939 41 2ms 24 Oct 2022 343rd MeWhenI 🇻🇦 939 41 2ms 5 Nov 2022 343rd Steffan153 🇫🇮 939 41 1ms 26 Nov 2022 343rd DialFrost 🇸🇬 939 41 1ms 12 Jan 2023 343rd sean-niemann 🇺🇸 939 41 1ms 12 Jan 2023 343rd Shanethegamer 🇺🇸 939 41 1ms 6 Feb 2023 343rd xsot 🇸🇬 939 41 1ms 9 Oct 2023 343rd Betuaredead 939 41 1ms 12 Nov 2023 343rd Yewzir 🇧🇪 939 41 1ms 14 Nov 2023 343rd dokutan 939 41 1ms 26 Mar 2024 343rd pardouin 🇫🇷 939 41 1ms 21 Sep 2024 343rd FlyingPenguin223 939 41 2ms 23 Oct 2024 343rd fuzzylojik-golf 🇺🇸 939 41 2ms 3 Jul 2025 343rd edsrzf 🇳🇿 939 41 1ms 22 Jul 2025 343rd snoozingnewt 🇨🇦 939 41 2ms 14 days ago 368th Yewzir 🇧🇪 938 16 36ms 18 Feb 2024 368th emgordon154 938 16 57ms 19 Mar 2025 370th GrayJoKing 🇦🇺 938 55 317ms 21 Nov 2021 370th JayXon 🇺🇸 938 55 316ms 21 Nov 2021 370th Lydxn 🇨🇦 938 55 319ms 21 Nov 2021 370th lynn 938 55 319ms 21 Nov 2021 370th NewDefectus 🇮🇱 938 55 320ms 21 Nov 2021 370th primo-ppcg 🇹🇭 938 55 326ms 21 Nov 2021 370th prplz 🇦🇺 938 55 321ms 21 Nov 2021 370th sisyphus-ppcg 🇦🇺 938 55 322ms 21 Nov 2021 370th inventshah 938 55 315ms 18 Jun 2022 370th m-tkach 🇺🇦 938 55 320ms 26 Jun 2022 370th sean-niemann 🇺🇸 938 55 368ms 3 Nov 2022 370th stefangimmillaro 938 55 323ms 4 Nov 2022 370th MeWhenI 🇻🇦 938 55 319ms 5 Nov 2022 370th Steffan153 🇫🇮 938 55 324ms 26 Nov 2022 370th annaproxy 938 55 312ms 8 Jan 2023 370th DialFrost 🇸🇬 938 55 319ms 12 Jan 2023 370th Shanethegamer 🇺🇸 938 55 322ms 6 Feb 2023 370th btnlq 938 55 314ms 10 Mar 2023 370th namelessiw 938 55 392ms 22 Jul 2023 370th Yewzir 🇧🇪 938 55 321ms 11 Oct 2023 370th AdrienHache 🇫🇷 938 55 313ms 21 Oct 2023 370th Betuaredead 938 55 317ms 11 Nov 2023 370th pardouin 🇫🇷 938 55 364ms 18 Aug 2024 370th voytxt 🇨🇿 938 55 310ms 19 Jan 2025 370th b-illy 🇬🇧 938 55 324ms 21 Jan 2025 370th fuzzylojik-golf 🇺🇸 938 55 368ms 29 May 2025 370th Yax42 🇫🇷 938 55 364ms 31 May 2025 370th edsrzf 🇳🇿 938 55 352ms 22 Jul 2025 370th CaedenHarper 🇨🇦 938 55 376ms 4 Sep 2025 370th snoozingnewt 🇨🇦 938 55 377ms 20 Oct 2025 400th GrayJoKing 🇦🇺 937 33 4ms 20 May 2021 First Prev 321–400 of 3,270 Next Last