The Calendar hole will go live in approximately 7 days. Why not try and solve it ahead of time?
Pernicious Numbers (Long) 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 158th AlephSquirrel 937 54 22ms 31 May 2023 158th anter69 🇭🇺 937 54 16ms 2 Apr 2024 158th jatloe 937 54 23ms 24 Aug 2024 158th emgordon154 937 54 17ms 19 Mar 2025 158th andrewjc2000 937 54 22ms 4 Apr 2025 158th wuduculfre 937 54 16ms 22 Jul 2025 158th ApoChagi 937 54 25ms 18 Oct 2025 158th snoozingnewt 🇨🇦 937 54 16ms 18 days ago 158th edsrzf 🇳🇿 937 54 16ms 10 hours ago 170th JayXon 🇺🇸 936 44 51ms 20 Nov 2022 170th sisyphus-ppcg 🇦🇺 936 44 157ms 21 Nov 2022 170th Steffan153 🇫🇮 936 44 47ms 22 Nov 2022 170th m-tkach 🇺🇦 936 44 48ms 22 Nov 2022 170th ovs-code 🇩🇪 936 44 50ms 22 Nov 2022 170th nwellnhof 🇩🇪 936 44 48ms 26 Nov 2022 170th janlelis 936 44 47ms 29 Nov 2022 170th xsot 🇸🇬 936 44 51ms 11 Jun 2023 170th Natanaelel 🇸🇪 936 44 47ms 12 Jul 2023 170th MeWhenI 🇻🇦 936 44 152ms 7 Aug 2023 170th DialFrost 🇸🇬 936 44 47ms 31 May 2024 170th sean-niemann 🇺🇸 936 44 50ms 4 Aug 2025 170th fuzzylojik-golf 🇺🇸 936 44 48ms 20 Aug 2025 183rd lukegustafson 🇺🇸 930 49 136ms 4 Aug 2024 183rd JayXon 🇺🇸 930 49 142ms 5 Aug 2024 183rd Lydxn 🇨🇦 930 49 135ms 8 Aug 2024 186th sisyphus-ppcg 🇦🇺 930 51 5ms 21 Jul 2023 187th JayXon 🇺🇸 930 69 339ms 21 Nov 2022 187th nwellnhof 🇩🇪 930 69 343ms 26 Nov 2022 187th stefangimmillaro 930 69 339ms 7 Feb 2023 187th sean-niemann 🇺🇸 930 69 369ms 7 Feb 2023 187th Lydxn 🇨🇦 930 69 342ms 7 Feb 2023 187th Steffan153 🇫🇮 930 69 335ms 7 Feb 2023 187th AdrienHache 🇫🇷 930 69 339ms 3 Nov 2023 187th namelessiw 930 69 388ms 14 Jun 2024 187th pardouin 🇫🇷 930 69 404ms 24 Apr 2025 196th DialFrost 🇸🇬 930 75 364ms 24 Sep 2025 196th pardouin 🇫🇷 930 75 600ms 24 Sep 2025 196th rucin93 🇵🇱 930 75 493ms 24 Sep 2025 196th sean-niemann 🇺🇸 930 75 450ms 24 Sep 2025 196th JayXon 🇺🇸 930 75 420ms 24 Sep 2025 196th nwellnhof 🇩🇪 930 75 401ms 25 Sep 2025 196th namelessiw 930 75 439ms 2 Oct 2025 196th stefangimmillaro 930 75 597ms 6 Oct 2025 196th Lydxn 🇨🇦 930 75 360ms 12 days ago 205th ovs-code 🇩🇪 929 51 363ms 15 Jan 2024 205th inventshah 929 51 366ms 15 Jan 2024 205th GrayJoKing 🇦🇺 929 51 355ms 15 Jan 2024 205th sisyphus-ppcg 🇦🇺 929 51 382ms 17 Jan 2024 205th AlephSquirrel 929 51 343ms 22 Jan 2024 205th lynn 929 51 358ms 17 Feb 2024 205th duckyluuk 🇳🇱 929 51 364ms 27 Mar 2024 205th fuzzylojik-golf 🇺🇸 929 51 345ms 20 Aug 2025 213th JayXon 🇺🇸 929 55 5ms 27 Nov 2022 213th btnlq 929 55 6ms 28 Dec 2022 213th Lydxn 🇨🇦 929 55 5ms 20 Jul 2023 213th pardouin 🇫🇷 929 55 7ms 22 Apr 2025 217th pardouin 🇫🇷 929 58 4ms 31 May 2025 218th sean-niemann 🇺🇸 928 46 703ms 12 Sep 2025 218th DialFrost 🇸🇬 928 46 742ms 13 Sep 2025 218th CaedenHarper 🇨🇦 928 46 741ms 17 Oct 2025 218th pardouin 🇫🇷 928 46 734ms 23 days ago 222nd btnlq 927 48 69ms 26 Aug 2024 223rd nwellnhof 🇩🇪 927 79 58ms 27 Nov 2022 223rd Lydxn 🇨🇦 927 79 60ms 4 Mar 2024 223rd JayXon 🇺🇸 927 79 60ms 4 Mar 2024 226th stefangimmillaro 926 74 121ms 20 Nov 2022 226th primo-ppcg 🇹🇭 926 74 121ms 20 Nov 2022 226th JayXon 🇺🇸 926 74 120ms 20 Nov 2022 226th Lydxn 🇨🇦 926 74 120ms 20 Nov 2022 226th inventshah 926 74 120ms 22 Nov 2022 226th Steffan153 🇫🇮 926 74 122ms 14 Jan 2023 226th sean-niemann 🇺🇸 926 74 125ms 12 Jun 2023 226th ovs-code 🇩🇪 926 74 121ms 23 Jun 2023 226th acotis 926 74 122ms 4 Feb 2025 226th lynn 926 74 119ms 4 Apr 2025 226th DialFrost 🇸🇬 926 74 123ms 5 Apr 2025 226th pardouin 🇫🇷 926 74 128ms 20 Apr 2025 226th fuzzylojik-golf 🇺🇸 926 74 122ms 29 Aug 2025 226th kumavale 926 74 120ms 4 Sep 2025 240th GrayJoKing 🇦🇺 925 54 17ms 26 Oct 2023 First Prev 161–240 of 1,820 Next Last
