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 146th sean-niemann 🇺🇸 972 22 236ms 22 Jan 2023 146th Shanethegamer 🇺🇸 972 22 248ms 6 Feb 2023 146th ovs-code 🇩🇪 972 22 269ms 17 Jul 2023 146th Yewzir 🇧🇪 972 22 278ms 19 Nov 2023 146th bitsandbeyond 🇳🇱 972 22 226ms 8 Jun 2024 146th pardouin 🇫🇷 972 22 235ms 19 Aug 2024 146th fuzzylojik-golf 🇺🇸 972 22 190ms 27 Aug 2025 146th snoozingnewt 🇨🇦 972 22 215ms 20 Oct 2025 169th GrayJoKing 🇦🇺 967 34 9ms 9 Feb 2021 169th JayXon 🇺🇸 967 34 9ms 9 Feb 2021 169th primo-ppcg 🇹🇭 967 34 9ms 9 Feb 2021 169th prplz 🇦🇺 967 34 9ms 10 Feb 2021 169th sisyphus-ppcg 🇦🇺 967 34 8ms 10 Feb 2021 169th Lydxn 🇨🇦 967 34 8ms 10 Feb 2021 169th Waffle3z 967 34 9ms 10 Feb 2021 169th o0lit3 🇺🇸 967 34 8ms 11 Feb 2021 169th NewDefectus 🇮🇱 967 34 9ms 8 May 2021 169th orthoplex 🇨🇽 967 34 9ms 12 Aug 2021 169th lynn 967 34 8ms 11 Sep 2021 169th akshatj27 🇦🇶 967 34 8ms 12 Nov 2021 169th Irratix 🇳🇱 967 34 9ms 22 Mar 2022 169th dmrichwa 🇺🇸 967 34 9ms 20 May 2022 169th inventshah 967 34 9ms 15 Jun 2022 169th AlephSquirrel 967 34 8ms 18 Jul 2022 169th sean-niemann 🇺🇸 967 34 8ms 4 Nov 2022 169th stefangimmillaro 967 34 9ms 4 Nov 2022 169th MeWhenI 🇻🇦 967 34 9ms 5 Nov 2022 169th emplv 🇱🇻 967 34 8ms 22 Nov 2022 169th Steffan153 🇫🇮 967 34 8ms 26 Nov 2022 169th DialFrost 🇸🇬 967 34 9ms 12 Jan 2023 169th rucin93 🇵🇱 967 34 9ms 14 Jan 2023 169th Argeento 🇵🇱 967 34 9ms 19 Jan 2023 169th Shanethegamer 🇺🇸 967 34 9ms 6 Feb 2023 169th xsot 🇸🇬 967 34 9ms 14 Jul 2023 169th ovs-code 🇩🇪 967 34 8ms 17 Jul 2023 169th Yewzir 🇧🇪 967 34 9ms 11 Oct 2023 169th Betuaredead 967 34 8ms 11 Nov 2023 169th lukegustafson 🇺🇸 967 34 9ms 3 Mar 2024 169th vlpx 🇫🇮 967 34 8ms 18 Jun 2024 169th pardouin 🇫🇷 967 34 9ms 17 Aug 2024 169th b-illy 🇬🇧 967 34 9ms 29 Sep 2024 169th voytxt 🇨🇿 967 34 9ms 19 Jan 2025 169th fuzzylojik-golf 🇺🇸 967 34 9ms 1 Jul 2025 169th CaedenHarper 🇨🇦 967 34 9ms 2 Sep 2025 169th snoozingnewt 🇨🇦 967 34 9ms 20 Oct 2025 206th prplz 🇦🇺 966 28 35ms 3 Jan 2020 206th primo-ppcg 🇹🇭 966 28 47ms 3 Jan 2020 206th stefangimmillaro 966 28 53ms 11 Dec 2024 206th radarek 🇵🇱 966 28 51ms 17 Dec 2024 206th pardouin 🇫🇷 966 28 33ms 12 Apr 2025 211th GrayJoKing 🇦🇺 964 24 2ms 9 Feb 2021 211th JayXon 🇺🇸 964 24 3ms 9 Feb 2021 211th primo-ppcg 🇹🇭 964 24 2ms 9 Feb 2021 211th prplz 🇦🇺 964 24 2ms 10 Feb 2021 211th sisyphus-ppcg 🇦🇺 964 24 3ms 10 Feb 2021 211th o0lit3 🇺🇸 964 24 2ms 11 Feb 2021 211th NewDefectus 🇮🇱 964 24 2ms 8 May 2021 211th Lydxn 🇨🇦 964 24 2ms 5 Jun 2021 211th lynn 964 24 2ms 11 Sep 2021 211th HPWiz 🇳🇿 964 24 2ms 13 Oct 2021 211th akshatj27 🇦🇶 964 24 2ms 11 Jan 2022 211th saito-ta 🇯🇵 964 24 2ms 29 Sep 2022 211th Steffan153 🇫🇮 964 24 2ms 26 Nov 2022 211th AlephSquirrel 964 24 2ms 10 Dec 2022 211th DialFrost 🇸🇬 964 24 3ms 12 Jan 2023 211th sean-niemann 🇺🇸 964 24 2ms 28 Jan 2023 211th Shanethegamer 🇺🇸 964 24 2ms 6 Feb 2023 211th MeWhenI 🇻🇦 964 24 3ms 16 Apr 2023 211th ovs-code 🇩🇪 964 24 3ms 17 Jul 2023 211th Betuaredead 964 24 2ms 12 Nov 2023 211th Yewzir 🇧🇪 964 24 2ms 14 Nov 2023 211th pardouin 🇫🇷 964 24 3ms 19 Aug 2024 211th xsot 🇸🇬 964 24 2ms 22 Jun 2025 211th fuzzylojik-golf 🇺🇸 964 24 3ms 1 Jul 2025 211th snoozingnewt 🇨🇦 964 24 3ms 15 days ago 236th sisyphus-ppcg 🇦🇺 956 26 936ms 23 Mar 2021 236th GrayJoKing 🇦🇺 956 26 931ms 23 Mar 2021 236th prplz 🇦🇺 956 26 1,291ms 23 Mar 2021 236th JayXon 🇺🇸 956 26 896ms 24 Mar 2021 236th primo-ppcg 🇹🇭 956 26 783ms 24 Mar 2021 First Prev 161–240 of 3,270 Next Last
