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 319th emgordon154 911 52 419ms 19 Mar 2025 319th CornerMercury 🇬🇧 911 52 330ms 12 Oct 2025 323rd sisyphus-ppcg 🇦🇺 910 37 895ms 30 Jan 2023 323rd emgordon154 910 37 868ms 20 Mar 2025 325th JayXon 🇺🇸 910 67 173ms 19 Mar 2023 325th Lydxn 🇨🇦 910 67 139ms 20 Mar 2023 325th jipsong 🇩🇪 910 67 139ms 10 Jun 2024 328th JayXon 🇺🇸 910 75 25ms 25 Jul 2023 329th JayXon 🇺🇸 909 98 275ms 26 Feb 2023 329th Lydxn 🇨🇦 909 98 274ms 20 Jul 2023 329th pardouin 🇫🇷 909 98 260ms 21 Apr 2025 332nd Steffan153 🇫🇮 908 55 17ms 23 Nov 2022 333rd inventshah 908 58 79ms 22 Nov 2022 334th edsrzf 🇳🇿 908 65 51ms 6 hours ago 335th Lydxn 🇨🇦 908 68 38ms 20 Jul 2023 336th Lydxn 🇨🇦 907 67 1,286ms 20 Jul 2023 336th JayXon 🇺🇸 907 67 1,267ms 20 Jul 2023 338th Lydxn 🇨🇦 906 51 6ms 15 Jan 2024 338th GrayJoKing 🇦🇺 906 51 6ms 19 Nov 2025 340th saito-ta 🇯🇵 906 53 54ms 15 Dec 2023 341st DialFrost 🇸🇬 906 54 1,665ms 1 Aug 2024 341st Steffan153 🇫🇮 906 54 139ms 15 Aug 2024 343rd primo-ppcg 🇹🇭 906 63 163ms 20 Nov 2022 343rd Lydxn 🇨🇦 906 63 127ms 20 Nov 2022 343rd Steffan153 🇫🇮 906 63 154ms 14 Jan 2023 343rd steffan-polygolf 906 63 151ms 14 Feb 2024 343rd DialFrost 🇸🇬 906 63 151ms 23 Apr 2025 348th SirBogman 🇺🇸 904 56 24ms 9 Jan 2024 348th sultan 904 56 16ms 3 Mar 2024 348th andrewdrewl 904 56 16ms 20 Jan 2025 348th qpwoeirut 904 56 15ms 11 Aug 2025 348th Lv0Sys 🇵🇱 904 56 22ms 16 days ago 353rd pardouin 🇫🇷 903 46 411ms 22 Apr 2025 354th sisyphus-ppcg 🇦🇺 902 52 9ms 21 Nov 2022 354th xsot 🇸🇬 902 52 28ms 28 Apr 2024 356th primo-ppcg 🇹🇭 901 58 101ms 20 Nov 2022 357th andersk 🇺🇸 901 76 119ms 20 Nov 2022 357th emgordon154 901 76 125ms 19 Mar 2025 357th dokutan 901 76 119ms 21 days ago 360th Lydxn 🇨🇦 900 73 5ms 13 Oct 2023 361st pardouin 🇫🇷 900 77 453ms 22 Apr 2025 362nd Lydxn 🇨🇦 900 86 28ms 26 Oct 2023 362nd pardouin 🇫🇷 900 86 29ms 23 Apr 2025 364th primo-ppcg 🇹🇭 900 99 275ms 20 Nov 2022 364th nwellnhof 🇩🇪 900 99 275ms 26 Nov 2022 366th JayXon 🇺🇸 899 61 4ms 27 Nov 2022 367th GrayJoKing 🇦🇺 899 64 78ms 3 Feb 2025 368th primo-ppcg 🇹🇭 895 46 43ms 20 Nov 2022 368th Shanethegamer 🇺🇸 895 46 55ms 21 Nov 2022 370th xsot 🇸🇬 895 53 4ms 21 Jul 2023 371st SirBogman 🇺🇸 894 53 370ms 20 Jan 2024 372nd primo-ppcg 🇹🇭 894 69 46ms 20 Nov 2022 373rd Shanethegamer 🇺🇸 894 78 447ms 25 Sep 2025 373rd ethanlally 894 78 371ms 22 days ago 375th DialFrost 🇸🇬 891 56 17ms 24 Mar 2025 375th sean-niemann 🇺🇸 891 56 16ms 25 Mar 2025 377th primo-ppcg 🇹🇭 891 72 340ms 20 Nov 2022 378th elgan65536 890 77 121ms 15 Apr 2024 378th The3gs 890 77 134ms 29 Nov 2024 378th luuumine 🇫🇷 890 77 118ms 16 days ago 381st emgordon154 889 27 3ms 14 Jun 2025 381st AlephSquirrel 889 27 4ms 4 Nov 2025 383rd edsrzf 🇳🇿 889 48 699ms 9 Sep 2025 384th Lydxn 🇨🇦 889 89 34ms 20 Jul 2023 385th orthoplex 🇨🇽 888 29 295ms 26 Jan 2024 385th ovs-code 🇩🇪 888 29 311ms 2 Feb 2024 385th fuzzylojik-golf 🇺🇸 888 29 306ms 20 Aug 2025 388th ZakkkkAttackkkk 🇵🇭 888 57 23ms 21 Nov 2022 388th thehylian 888 57 16ms 2 Jan 2023 388th FlorianCassayre 🇫🇷 888 57 17ms 18 Jan 2023 388th bricknellj 888 57 16ms 17 Mar 2023 388th davecame 888 57 26ms 2 Oct 2023 388th Yewzir 🇧🇪 888 57 17ms 8 Oct 2023 388th Betuaredead 888 57 16ms 13 Nov 2023 388th Bulmenisaurus 888 57 17ms 21 Jul 2024 388th ryyyn 🇺🇸 888 57 24ms 25 Jun 2025 388th yujh-yujh 🇬🇸 888 57 25ms 13 days ago 388th AdrienHache 🇫🇷 888 57 24ms 6 days ago 399th Lydxn 🇨🇦 886 35 410ms 5 Jan 2024 399th pardouin 🇫🇷 886 35 288ms 21 Apr 2025 First Prev 321–400 of 1,817 Next Last