The Calendar hole will go live in approximately 12 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 238th JayXon 🇺🇸 956 26 896ms 24 Mar 2021 238th primo-ppcg 🇹🇭 956 26 783ms 24 Mar 2021 238th Lydxn 🇨🇦 956 26 990ms 11 Jun 2021 238th lynn 956 26 950ms 1 Jun 2022 238th Steffan153 🇫🇮 956 26 1,019ms 16 Dec 2022 238th stefangimmillaro 956 26 909ms 17 Dec 2022 238th sean-niemann 🇺🇸 956 26 973ms 4 Jan 2023 238th DialFrost 🇸🇬 956 26 1,004ms 18 Jan 2023 238th Shanethegamer 🇺🇸 956 26 994ms 6 Feb 2023 238th inventshah 956 26 873ms 27 Sep 2023 238th Yewzir 🇧🇪 956 26 1,093ms 6 Feb 2024 238th emgordon154 956 26 900ms 18 Mar 2025 238th pardouin 🇫🇷 956 26 1,067ms 13 Apr 2025 238th edsrzf 🇳🇿 956 26 933ms 22 Jul 2025 238th fuzzylojik-golf 🇺🇸 956 26 1,025ms 21 Aug 2025 238th snoozingnewt 🇨🇦 956 26 736ms 9 days ago 257th GrayJoKing 🇦🇺 955 22 2ms 20 Mar 2025 258th alemelis 954 41 9ms 4 Oct 2024 258th Natanaelel 🇸🇪 954 41 15ms 14 Nov 2024 258th voytxt 🇨🇿 954 41 9ms 19 Jan 2025 258th plcc0 954 41 9ms 5 Mar 2025 258th GolfingSuccess 🇬🇷 954 41 9ms 20 days ago 263rd JayXon 🇺🇸 953 47 1ms 9 Feb 2021 263rd primo-ppcg 🇹🇭 953 47 1ms 9 Feb 2021 263rd sisyphus-ppcg 🇦🇺 953 47 1ms 10 Feb 2021 263rd Lydxn 🇨🇦 953 47 1ms 19 Apr 2022 263rd Irratix 🇳🇱 953 47 1ms 13 Jun 2022 263rd inventshah 953 47 1ms 15 Jun 2022 263rd saito-ta 🇯🇵 953 47 1ms 21 Jun 2022 263rd sean-niemann 🇺🇸 953 47 2ms 4 Nov 2022 263rd Alex-x90 🇺🇸 953 47 2ms 24 Feb 2023 263rd Shanethegamer 🇺🇸 953 47 1ms 3 Apr 2023 263rd xsot 🇸🇬 953 47 1ms 14 Jul 2023 263rd rhdqor213 953 47 1ms 10 Aug 2023 263rd ovs-code 🇩🇪 953 47 1ms 8 Oct 2023 263rd Yewzir 🇧🇪 953 47 1ms 11 Oct 2023 263rd Betuaredead 953 47 2ms 11 Nov 2023 263rd KasperKivimaeki 🇫🇮 953 47 1ms 20 Jan 2024 263rd pardouin 🇫🇷 953 47 2ms 20 Aug 2024 263rd JohandeRuiter 🇳🇱 953 47 2ms 30 Sep 2024 263rd kaurakeksi 🇫🇮 953 47 2ms 1 Jan 2025 263rd Mukundan314 953 47 2ms 26 Apr 2025 263rd b-illy 🇬🇧 953 47 2ms 5 Jun 2025 263rd fuzzylojik-golf 🇺🇸 953 47 2ms 19 Aug 2025 263rd CaedenHarper 🇨🇦 953 47 2ms 4 Sep 2025 263rd 09cf 953 47 2ms 19 days ago 263rd snoozingnewt 🇨🇦 953 47 2ms 16 days ago 263rd DialFrost 🇸🇬 953 47 2ms 5 days ago 289th GrayJoKing 🇦🇺 948 35 4ms 9 Feb 2021 289th JayXon 🇺🇸 948 35 4ms 9 Feb 2021 289th primo-ppcg 🇹🇭 948 35 4ms 9 Feb 2021 289th prplz 🇦🇺 948 35 4ms 10 Feb 2021 289th Lydxn 🇨🇦 948 35 4ms 10 Feb 2021 289th o0lit3 🇺🇸 948 35 4ms 11 Feb 2021 289th sisyphus-ppcg 🇦🇺 948 35 6ms 5 Jun 2021 289th lynn 948 35 4ms 11 Sep 2021 289th stefangimmillaro 948 35 4ms 4 Nov 2022 289th MeWhenI 🇻🇦 948 35 5ms 6 Nov 2022 289th sean-niemann 🇺🇸 948 35 4ms 6 Nov 2022 289th emplv 🇱🇻 948 35 5ms 22 Nov 2022 289th Steffan153 🇫🇮 948 35 4ms 26 Nov 2022 289th DialFrost 🇸🇬 948 35 5ms 12 Jan 2023 289th Shanethegamer 🇺🇸 948 35 4ms 6 Feb 2023 289th rucin93 🇵🇱 948 35 4ms 4 Jul 2023 289th ovs-code 🇩🇪 948 35 4ms 4 Oct 2023 289th Yewzir 🇧🇪 948 35 4ms 11 Oct 2023 289th Betuaredead 948 35 4ms 11 Nov 2023 289th xsot 🇸🇬 948 35 4ms 7 Apr 2024 289th pardouin 🇫🇷 948 35 4ms 19 Aug 2024 289th fuzzylojik-golf 🇺🇸 948 35 4ms 1 Jul 2025 289th edsrzf 🇳🇿 948 35 4ms 4 Sep 2025 289th snoozingnewt 🇨🇦 948 35 4ms 20 Oct 2025 289th KasperKivimaeki 🇫🇮 948 35 5ms 9 days ago 314th JayXon 🇺🇸 947 31 459ms 25 Feb 2021 314th HPWiz 🇳🇿 947 31 421ms 27 Apr 2021 314th Lydxn 🇨🇦 947 31 461ms 16 Jun 2021 314th Steffan153 🇫🇮 947 31 417ms 30 Nov 2022 314th sisyphus-ppcg 🇦🇺 947 31 456ms 24 Jan 2023 314th ovs-code 🇩🇪 947 31 462ms 24 Oct 2023 314th DialFrost 🇸🇬 947 31 502ms 24 Oct 2023 First Prev 241–320 of 3,273 Next Last