The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Pernicious Numbers (Long) 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 160th JayXon 🇺🇸 931 68 331ms 7 Feb 2023 162nd CaedenHarper 🇨🇦 930 49 378ms 19 Sep 2024 162nd Babafaba 930 49 371ms 22 days ago 164th sisyphus-ppcg 🇦🇺 930 51 5ms 21 Jul 2023 165th JayXon 🇺🇸 930 55 5ms 27 Nov 2022 165th btnlq 930 55 5ms 28 Dec 2022 165th Lydxn 🇨🇦 930 55 5ms 20 Jul 2023 165th pardouin 🇫🇷 930 55 5ms 22 Apr 2025 169th JayXon 🇺🇸 930 74 475ms 24 Sep 2025 169th Lydxn 🇨🇦 930 74 358ms 6 days ago 171st primo-ppcg 🇹🇭 929 57 4ms 20 Nov 2022 171st pardouin 🇫🇷 929 57 6ms 31 May 2025 173rd sean-niemann 🇺🇸 928 46 703ms 12 Sep 2025 173rd DialFrost 🇸🇬 928 46 742ms 13 Sep 2025 173rd edsrzf 🇳🇿 928 46 699ms 18 Sep 2025 173rd CaedenHarper 🇨🇦 928 46 741ms 17 Oct 2025 173rd pardouin 🇫🇷 928 46 734ms 17 days ago 178th btnlq 927 48 69ms 26 Aug 2024 179th GrayJoKing 🇦🇺 927 52 17ms 26 Oct 2023 179th JayXon 🇺🇸 927 52 16ms 26 Oct 2023 179th Lydxn 🇨🇦 927 52 17ms 26 Oct 2023 179th IanUtley 927 52 16ms 14 Nov 2023 183rd nwellnhof 🇩🇪 927 79 64ms 27 Nov 2022 183rd Lydxn 🇨🇦 927 79 77ms 4 Mar 2024 183rd JayXon 🇺🇸 927 79 77ms 4 Mar 2024 186th stefangimmillaro 926 74 125ms 20 Nov 2022 186th primo-ppcg 🇹🇭 926 74 121ms 20 Nov 2022 186th JayXon 🇺🇸 926 74 120ms 20 Nov 2022 186th Lydxn 🇨🇦 926 74 120ms 20 Nov 2022 186th inventshah 926 74 120ms 22 Nov 2022 186th Steffan153 🇫🇮 926 74 122ms 14 Jan 2023 186th sean-niemann 🇺🇸 926 74 125ms 12 Jun 2023 186th ovs-code 🇩🇪 926 74 121ms 23 Jun 2023 186th acotis 926 74 122ms 4 Feb 2025 186th lynn 926 74 119ms 4 Apr 2025 186th DialFrost 🇸🇬 926 74 123ms 5 Apr 2025 186th pardouin 🇫🇷 926 74 128ms 20 Apr 2025 186th fuzzylojik-golf 🇺🇸 926 74 122ms 29 Aug 2025 186th kumavale 926 74 120ms 4 Sep 2025 200th Lydxn 🇨🇦 925 57 23ms 22 Dec 2023 201st pardouin 🇫🇷 924 45 505ms 22 Apr 2025 202nd JayXon 🇺🇸 924 50 6ms 19 Nov 2025 202nd pardouin 🇫🇷 924 50 6ms 19 Nov 2025 204th stefangimmillaro 924 57 87ms 20 Nov 2022 204th Lydxn 🇨🇦 924 57 87ms 20 Nov 2022 204th JayXon 🇺🇸 924 57 88ms 21 Nov 2022 204th Steffan153 🇫🇮 924 57 89ms 30 Jan 2023 204th sean-niemann 🇺🇸 924 57 92ms 7 Feb 2023 204th DialFrost 🇸🇬 924 57 89ms 21 Dec 2023 210th AlephSquirrel 924 58 46ms 15 Jan 2023 211th Bubbler-4 923 26 3ms 23 Nov 2022 211th Natanaelel 🇸🇪 923 26 3ms 14 Jul 2023 211th SirBogman 🇺🇸 923 26 3ms 9 Nov 2023 211th DialFrost 🇸🇬 923 26 2ms 3 Feb 2024 211th bstrat 923 26 2ms 9 Jun 2024 211th zacjl 923 26 3ms 17 Aug 2024 211th shadowninja55 🇺🇸 923 26 2ms 30 Dec 2024 211th Garklein 🇨🇦 923 26 2ms 6 Jan 2025 211th GrayJoKing 🇦🇺 923 26 2ms 5 Jun 2025 220th Bubbler-4 923 45 70ms 13 Sep 2023 220th Lydxn 🇨🇦 923 45 72ms 13 Sep 2023 220th chunes3 🇺🇸 923 45 70ms 13 Sep 2023 220th 4hg 🇺🇸 923 45 70ms 15 Sep 2023 220th Steffan153 🇫🇮 923 45 69ms 15 Sep 2023 220th gifti258 923 45 69ms 15 Sep 2023 220th MeWhenI 🇻🇦 923 45 67ms 2 Nov 2023 220th Yewzir 🇧🇪 923 45 70ms 5 Mar 2024 228th Lydxn 🇨🇦 923 52 2,041ms 20 Jul 2023 229th Lydxn 🇨🇦 923 53 1,084ms 21 Jul 2023 229th ovs-code 🇩🇪 923 53 137ms 16 Aug 2023 231st henkma 922 67 323ms 6 Jun 2023 231st xnor-gate 922 67 373ms 17 Jun 2023 233rd primo-ppcg 🇹🇭 921 54 41ms 20 Nov 2022 233rd Lydxn 🇨🇦 921 54 42ms 20 Nov 2022 235th primo-ppcg 🇹🇭 920 54 24ms 20 Nov 2022 235th Bubbler-4 920 54 15ms 25 Nov 2022 235th Alex-x90 🇺🇸 920 54 17ms 20 Jan 2023 235th ZakkkkAttackkkk 🇵🇭 920 54 24ms 15 Feb 2023 235th Yewzir 🇧🇪 920 54 17ms 6 Apr 2023 235th AlephSquirrel 920 54 22ms 31 May 2023 First Prev 161–240 of 1,799 Next Last