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 156th Lydxn 🇨🇦 967 34 8ms 10 Feb 2021 156th Waffle3z 967 34 9ms 10 Feb 2021 156th o0lit3 🇺🇸 967 34 8ms 11 Feb 2021 156th NewDefectus 🇮🇱 967 34 9ms 8 May 2021 156th orthoplex 🇨🇽 967 34 9ms 12 Aug 2021 156th lynn 967 34 8ms 11 Sep 2021 156th akshatj27 🇦🇶 967 34 8ms 12 Nov 2021 156th Irratix 🇳🇱 967 34 9ms 22 Mar 2022 156th dmrichwa 🇺🇸 967 34 9ms 20 May 2022 156th inventshah 967 34 9ms 15 Jun 2022 156th AlephSquirrel 967 34 8ms 18 Jul 2022 156th sean-niemann 🇺🇸 967 34 8ms 4 Nov 2022 156th stefangimmillaro 967 34 9ms 4 Nov 2022 156th MeWhenI 🇻🇦 967 34 9ms 5 Nov 2022 156th emplv 🇱🇻 967 34 8ms 22 Nov 2022 156th Steffan153 🇫🇮 967 34 8ms 26 Nov 2022 156th DialFrost 🇸🇬 967 34 9ms 12 Jan 2023 156th rucin93 🇵🇱 967 34 9ms 14 Jan 2023 156th Argeento 🇵🇱 967 34 9ms 19 Jan 2023 156th Shanethegamer 🇺🇸 967 34 9ms 6 Feb 2023 156th xsot 🇸🇬 967 34 9ms 14 Jul 2023 156th ovs-code 🇩🇪 967 34 8ms 17 Jul 2023 156th Yewzir 🇧🇪 967 34 9ms 11 Oct 2023 156th Betuaredead 967 34 8ms 11 Nov 2023 156th lukegustafson 🇺🇸 967 34 9ms 3 Mar 2024 156th vlpx 🇫🇮 967 34 8ms 18 Jun 2024 156th pardouin 🇫🇷 967 34 9ms 17 Aug 2024 156th b-illy 🇬🇧 967 34 9ms 29 Sep 2024 156th voytxt 🇨🇿 967 34 9ms 19 Jan 2025 156th fuzzylojik-golf 🇺🇸 967 34 9ms 1 Jul 2025 156th CaedenHarper 🇨🇦 967 34 9ms 2 Sep 2025 156th snoozingnewt 🇨🇦 967 34 9ms 20 Oct 2025 193rd GrayJoKing 🇦🇺 966 24 132ms 9 May 2021 193rd sisyphus-ppcg 🇦🇺 966 24 155ms 9 May 2021 193rd prplz 🇦🇺 966 24 237ms 9 May 2021 193rd primo-ppcg 🇹🇭 966 24 168ms 10 May 2021 193rd Lydxn 🇨🇦 966 24 498ms 25 Sep 2021 193rd lynn 966 24 214ms 3 Jun 2022 193rd JayXon 🇺🇸 966 24 210ms 8 Sep 2022 193rd Steffan153 🇫🇮 966 24 140ms 26 Nov 2022 193rd DialFrost 🇸🇬 966 24 183ms 13 Jan 2023 193rd sean-niemann 🇺🇸 966 24 126ms 29 Jan 2023 193rd SirFireball3521 966 24 175ms 13 Mar 2023 193rd Yewzir 🇧🇪 966 24 131ms 12 Oct 2023 193rd Betuaredead 966 24 117ms 12 Nov 2023 193rd ovs-code 🇩🇪 966 24 170ms 2 Jan 2024 193rd pardouin 🇫🇷 966 24 121ms 19 Aug 2024 193rd fuzzylojik-golf 🇺🇸 966 24 137ms 6 Jul 2025 193rd snoozingnewt 🇨🇦 966 24 91ms 15 days ago 210th primo-ppcg 🇹🇭 965 29 36ms 9 Feb 2021 210th prplz 🇦🇺 965 29 36ms 10 Feb 2021 210th NewDefectus 🇮🇱 965 29 34ms 8 May 2021 210th akshatj27 🇦🇶 965 29 41ms 11 Jan 2022 210th stefangimmillaro 965 29 38ms 4 Nov 2022 210th m-tkach 🇺🇦 965 29 36ms 23 Nov 2022 210th Steffan153 🇫🇮 965 29 39ms 1 Jan 2023 210th DialFrost 🇸🇬 965 29 35ms 13 Jan 2023 210th sean-niemann 🇺🇸 965 29 43ms 29 Jan 2023 210th MeWhenI 🇻🇦 965 29 50ms 30 Jan 2023 210th JayXon 🇺🇸 965 29 32ms 25 Dec 2023 210th sisyphus-ppcg 🇦🇺 965 29 53ms 25 Dec 2023 210th Yewzir 🇧🇪 965 29 35ms 25 Dec 2023 210th GrayJoKing 🇦🇺 965 29 34ms 26 Dec 2023 210th Lydxn 🇨🇦 965 29 37ms 29 Dec 2023 210th xsot 🇸🇬 965 29 35ms 30 Dec 2023 210th radarek 🇵🇱 965 29 44ms 7 Jul 2024 210th pardouin 🇫🇷 965 29 49ms 29 Mar 2025 210th fuzzylojik-golf 🇺🇸 965 29 36ms 30 Aug 2025 210th snoozingnewt 🇨🇦 965 29 41ms 15 days ago 230th GrayJoKing 🇦🇺 964 24 2ms 9 Feb 2021 230th JayXon 🇺🇸 964 24 3ms 9 Feb 2021 230th primo-ppcg 🇹🇭 964 24 2ms 9 Feb 2021 230th prplz 🇦🇺 964 24 2ms 10 Feb 2021 230th sisyphus-ppcg 🇦🇺 964 24 3ms 10 Feb 2021 230th o0lit3 🇺🇸 964 24 2ms 11 Feb 2021 230th NewDefectus 🇮🇱 964 24 2ms 8 May 2021 230th Lydxn 🇨🇦 964 24 2ms 5 Jun 2021 230th lynn 964 24 2ms 11 Sep 2021 230th HPWiz 🇳🇿 964 24 2ms 13 Oct 2021 230th akshatj27 🇦🇶 964 24 2ms 11 Jan 2022 First Prev 161–240 of 3,296 Next Last
