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 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 230th saito-ta 🇯🇵 964 24 2ms 29 Sep 2022 230th Steffan153 🇫🇮 964 24 2ms 26 Nov 2022 230th AlephSquirrel 964 24 2ms 10 Dec 2022 230th DialFrost 🇸🇬 964 24 3ms 12 Jan 2023 230th sean-niemann 🇺🇸 964 24 2ms 28 Jan 2023 230th Shanethegamer 🇺🇸 964 24 2ms 6 Feb 2023 230th MeWhenI 🇻🇦 964 24 3ms 16 Apr 2023 230th ovs-code 🇩🇪 964 24 3ms 17 Jul 2023 230th Betuaredead 964 24 2ms 12 Nov 2023 230th Yewzir 🇧🇪 964 24 2ms 14 Nov 2023 230th pardouin 🇫🇷 964 24 3ms 19 Aug 2024 230th xsot 🇸🇬 964 24 2ms 22 Jun 2025 230th fuzzylojik-golf 🇺🇸 964 24 3ms 1 Jul 2025 230th snoozingnewt 🇨🇦 964 24 3ms 15 days ago 255th sisyphus-ppcg 🇦🇺 956 26 936ms 23 Mar 2021 255th GrayJoKing 🇦🇺 956 26 931ms 23 Mar 2021 255th prplz 🇦🇺 956 26 1,291ms 23 Mar 2021 255th JayXon 🇺🇸 956 26 896ms 24 Mar 2021 255th primo-ppcg 🇹🇭 956 26 783ms 24 Mar 2021 255th Lydxn 🇨🇦 956 26 990ms 11 Jun 2021 255th lynn 956 26 950ms 1 Jun 2022 255th Steffan153 🇫🇮 956 26 1,019ms 16 Dec 2022 255th stefangimmillaro 956 26 909ms 17 Dec 2022 255th sean-niemann 🇺🇸 956 26 973ms 4 Jan 2023 255th DialFrost 🇸🇬 956 26 1,004ms 18 Jan 2023 255th Shanethegamer 🇺🇸 956 26 994ms 6 Feb 2023 255th inventshah 956 26 873ms 27 Sep 2023 255th Yewzir 🇧🇪 956 26 1,093ms 6 Feb 2024 255th emgordon154 956 26 900ms 18 Mar 2025 255th pardouin 🇫🇷 956 26 1,067ms 13 Apr 2025 255th edsrzf 🇳🇿 956 26 933ms 22 Jul 2025 255th fuzzylojik-golf 🇺🇸 956 26 1,025ms 21 Aug 2025 255th snoozingnewt 🇨🇦 956 26 736ms 8 days ago 274th GrayJoKing 🇦🇺 955 22 2ms 20 Mar 2025 275th alemelis 954 41 9ms 4 Oct 2024 275th Natanaelel 🇸🇪 954 41 15ms 14 Nov 2024 275th voytxt 🇨🇿 954 41 9ms 19 Jan 2025 275th plcc0 954 41 9ms 5 Mar 2025 275th GolfingSuccess 🇬🇷 954 41 9ms 19 days ago 280th GrayJoKing 🇦🇺 953 48 1ms 9 Feb 2021 280th JayXon 🇺🇸 953 48 1ms 9 Feb 2021 280th primo-ppcg 🇹🇭 953 48 2ms 9 Feb 2021 280th prplz 🇦🇺 953 48 1ms 10 Feb 2021 280th sisyphus-ppcg 🇦🇺 953 48 1ms 10 Feb 2021 280th Lydxn 🇨🇦 953 48 1ms 10 Feb 2021 280th NewDefectus 🇮🇱 953 48 1ms 8 May 2021 280th orthoplex 🇨🇽 953 48 1ms 12 Aug 2021 280th akshatj27 🇦🇶 953 48 1ms 11 Jan 2022 280th Irratix 🇳🇱 953 48 1ms 22 Mar 2022 280th lynn 953 48 1ms 3 Jun 2022 280th saito-ta 🇯🇵 953 48 1ms 15 Jun 2022 280th inventshah 953 48 1ms 15 Jun 2022 280th AlephSquirrel 953 48 1ms 18 Jul 2022 280th sean-niemann 🇺🇸 953 48 2ms 4 Nov 2022 280th stefangimmillaro 953 48 2ms 4 Nov 2022 280th MeWhenI 🇻🇦 953 48 1ms 5 Nov 2022 280th emplv 🇱🇻 953 48 1ms 22 Nov 2022 280th Steffan153 🇫🇮 953 48 1ms 26 Nov 2022 280th DialFrost 🇸🇬 953 48 1ms 12 Jan 2023 280th rucin93 🇵🇱 953 48 1ms 22 Jan 2023 280th Shanethegamer 🇺🇸 953 48 1ms 6 Feb 2023 280th Alex-x90 🇺🇸 953 48 1ms 24 Feb 2023 280th xsot 🇸🇬 953 48 1ms 14 Jul 2023 280th ovs-code 🇩🇪 953 48 1ms 17 Jul 2023 280th rhdqor213 953 48 1ms 10 Aug 2023 280th Yewzir 🇧🇪 953 48 2ms 11 Oct 2023 280th Betuaredead 953 48 1ms 11 Nov 2023 280th KasperKivimaeki 🇫🇮 953 48 2ms 20 Jan 2024 280th pardouin 🇫🇷 953 48 2ms 17 Aug 2024 280th JohandeRuiter 🇳🇱 953 48 2ms 29 Sep 2024 280th kaurakeksi 🇫🇮 953 48 2ms 1 Jan 2025 280th voytxt 🇨🇿 953 48 1ms 19 Jan 2025 280th Mukundan314 953 48 1ms 26 Apr 2025 280th b-illy 🇬🇧 953 48 2ms 5 Jun 2025 280th fuzzylojik-golf 🇺🇸 953 48 2ms 19 Aug 2025 280th edsrzf 🇳🇿 953 48 2ms 4 Sep 2025 280th CaedenHarper 🇨🇦 953 48 2ms 4 Sep 2025 280th snoozingnewt 🇨🇦 953 48 2ms 26 days ago 280th 09cf 953 48 1ms 23 days ago 320th GrayJoKing 🇦🇺 948 35 4ms 9 Feb 2021 First Prev 241–320 of 3,296 Next Last
