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 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 79th Lydxn 🇨🇦 962 35 983ms 20 Nov 2022 79th GrayJoKing 🇦🇺 962 35 1,042ms 29 Nov 2022 79th Steffan153 🇫🇮 962 35 892ms 16 Dec 2022 79th stefangimmillaro 962 35 1,072ms 28 Dec 2022 79th sean-niemann 🇺🇸 962 35 909ms 6 Feb 2023 79th DialFrost 🇸🇬 962 35 997ms 21 Dec 2023 79th pardouin 🇫🇷 962 35 900ms 22 Apr 2025 79th fuzzylojik-golf 🇺🇸 962 35 999ms 21 Aug 2025 89th primo-ppcg 🇹🇭 961 46 12ms 20 Nov 2022 89th nwellnhof 🇩🇪 961 46 11ms 26 Nov 2022 89th JayXon 🇺🇸 961 46 11ms 27 Nov 2022 89th Lydxn 🇨🇦 961 46 11ms 20 Jul 2023 89th lukegustafson 🇺🇸 961 46 11ms 8 Mar 2024 89th pardouin 🇫🇷 961 46 11ms 21 Apr 2025 95th Steffan153 🇫🇮 960 25 3ms 14 Jan 2023 95th ashtraypettingzoo 🇺🇸 960 25 37ms 22 Feb 2023 95th yzhs 🇩🇪 960 25 37ms 21 Jun 2023 95th MeWhenI 🇻🇦 960 25 37ms 7 Aug 2023 95th Yewzir 🇧🇪 960 25 39ms 6 Nov 2023 95th orthoplex 🇨🇽 960 25 37ms 20 Jul 2024 95th copy 960 25 2ms 26 Sep 2024 95th Natanaelel 🇸🇪 960 25 37ms 1 Mar 2025 103rd GrayJoKing 🇦🇺 957 43 152ms 20 Nov 2022 103rd stefangimmillaro 957 43 154ms 5 Jan 2023 103rd Lydxn 🇨🇦 957 43 60ms 14 Jan 2023 103rd radarek 🇵🇱 957 43 180ms 22 Jul 2024 103rd pardouin 🇫🇷 957 43 140ms 22 Apr 2025 108th prplz 🇦🇺 955 53 18ms 27 Nov 2022 108th sisyphus-ppcg 🇦🇺 955 53 16ms 20 Jan 2023 108th jared-hughes 955 53 23ms 20 Jan 2023 108th 5cw 🇺🇸 955 53 20ms 2 Aug 2024 108th lifthrasiir 🇰🇷 955 53 16ms 10 Nov 2024 108th dirckvdende 955 53 17ms 25 Jul 2025 108th blaztoma 🇱🇹 955 53 23ms 15 Sep 2025 108th solisolu 955 53 17ms 13 days ago 108th KasperKivimaeki 🇫🇮 955 53 27ms 14 hours ago 117th primo-ppcg 🇹🇭 954 37 8ms 20 Nov 2022 117th nwellnhof 🇩🇪 954 37 8ms 26 Nov 2022 117th Lydxn 🇨🇦 954 37 8ms 20 Jul 2023 120th Steffan153 🇫🇮 953 27 326ms 14 Jan 2023 120th pardouin 🇫🇷 953 27 344ms 24 Oct 2024 122nd Lydxn 🇨🇦 947 50 389ms 16 Jan 2024 122nd sean-niemann 🇺🇸 947 50 378ms 17 Jan 2024 122nd DialFrost 🇸🇬 947 50 379ms 17 Jan 2024 122nd JayXon 🇺🇸 947 50 392ms 17 Jan 2024 122nd m-tkach 🇺🇦 947 50 380ms 21 Jan 2024 122nd kg583 🇺🇸 947 50 377ms 11 Mar 2024 122nd Steffan153 🇫🇮 947 50 378ms 12 Mar 2024 122nd xsot 🇸🇬 947 50 391ms 14 May 2024 122nd pardouin 🇫🇷 947 50 368ms 21 Jun 2024 122nd b-illy 🇬🇧 947 50 362ms 7 Sep 2024 122nd CaedenHarper 🇨🇦 947 50 361ms 19 Sep 2024 122nd Babafaba 947 50 410ms 21 days ago 134th JayXon 🇺🇸 945 44 439ms 20 Nov 2022 134th Lydxn 🇨🇦 945 44 402ms 20 Nov 2022 136th primo-ppcg 🇹🇭 945 57 4ms 20 Nov 2022 136th JayXon 🇺🇸 945 57 4ms 27 Nov 2022 136th nwellnhof 🇩🇪 945 57 4ms 27 Nov 2022 136th Lydxn 🇨🇦 945 57 3ms 20 Jul 2023 140th ovs-code 🇩🇪 944 44 75ms 12 Sep 2024 140th GrayJoKing 🇦🇺 944 44 71ms 13 Sep 2024 140th Kacarott 🇦🇺 944 44 73ms 13 Sep 2024 140th error256 944 44 69ms 13 Sep 2024 140th pardouin 🇫🇷 944 44 67ms 13 Sep 2024 140th dokutan 944 44 69ms 13 Sep 2024 140th DialFrost 🇸🇬 944 44 70ms 25 Sep 2024 140th edsrzf 🇳🇿 944 44 67ms 3 Nov 2024 140th Shanethegamer 🇺🇸 944 44 72ms 22 Nov 2024 140th primo-ppcg 🇹🇭 944 44 69ms 5 Apr 2025 140th sean-niemann 🇺🇸 944 44 71ms 7 Apr 2025 140th fuzzylojik-golf 🇺🇸 944 44 68ms 17 Sep 2025 152nd AdrienHache 🇫🇷 942 41 56ms 1 Apr 2024 152nd lyphyser 942 41 50ms 14 Apr 2024 154th GrayJoKing 🇦🇺 939 30 15ms 20 Mar 2025 155th primo-ppcg 🇹🇭 938 50 7ms 20 Nov 2022 155th Lydxn 🇨🇦 938 50 6ms 20 Jul 2023 157th primo-ppcg 🇹🇭 937 54 24ms 20 Nov 2022 157th Bubbler-4 937 54 15ms 25 Nov 2022 157th commandblockguy 🇺🇸 937 54 24ms 11 Apr 2023 157th AlephSquirrel 937 54 22ms 31 May 2023 First Prev 81–160 of 1,815 Next Last