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 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 641st jakobkordez 🇸🇮 776 64 2,278ms 20 Nov 2022 641st nstearns96 🇬🇧 776 64 245ms 23 Nov 2022 641st Bodo171 776 64 16ms 27 Nov 2022 641st TaserTheFox 🇺🇸 776 64 16ms 14 Jan 2023 641st jmerle 🇳🇱 776 64 16ms 16 Feb 2023 641st vishwathg 776 64 16ms 7 Apr 2023 641st dteague3989 776 64 16ms 8 Aug 2023 641st NickTheEASDude 🇺🇸 776 64 23ms 1 May 2024 641st aalec 776 64 16ms 3 May 2024 641st mishak-sys 776 64 16ms 25 Feb 2025 641st YAJUE114514 776 64 15ms 1 Aug 2025 641st Deedogg 776 64 16ms 30 Oct 2025 653rd pardouin 🇫🇷 776 68 33ms 24 Apr 2025 654th Yewzir 🇧🇪 776 88 25ms 13 Feb 2024 655th Steffan153 🇫🇮 775 57 12ms 14 Jan 2023 655th sisyphus-ppcg 🇦🇺 775 57 11ms 20 Jul 2023 657th rak1507 🇬🇧 774 31 2ms 7 Jan 2023 657th Yewzir 🇧🇪 774 31 9ms 9 Dec 2023 657th snoozingnewt 🇨🇦 774 31 37ms 20 Sep 2025 660th DialFrost 🇸🇬 773 181 52ms 23 May 2025 661st GolfingSuccess 🇬🇷 772 59 344ms 15 Jan 2024 661st albanian-laundromat 772 59 335ms 8 Oct 2025 663rd pardouin 🇫🇷 772 76 10ms 24 Apr 2025 664th DialFrost 🇸🇬 772 80 184ms 5 Aug 2024 665th emgordon154 772 104 115ms 25 days ago 666th dokutan 771 95 60ms 23 Mar 2024 667th dokutan 770 54 293ms 9 Apr 2024 667th snoozingnewt 🇨🇦 770 54 279ms 14 days ago 669th emplv 🇱🇻 769 61 8ms 21 Jun 2023 670th Yewzir 🇧🇪 769 68 123ms 14 Feb 2024 671st ovs-code 🇩🇪 768 69 5ms 10 Feb 2024 672nd SirFireball3521 767 37 245ms 13 Mar 2023 673rd fourth-bit 764 65 19ms 11 Jul 2023 673rd Bmrl7 764 65 18ms 24 Feb 2024 673rd shelerr 764 65 26ms 22 Aug 2025 676th Irratix 🇳🇱 763 96 57ms 11 Dec 2022 677th AlephSquirrel 762 58 116ms 1 Jun 2023 678th JGDoerrer 761 90 125ms 20 Dec 2022 678th klixel 🇨🇦 761 90 124ms 17 Apr 2023 678th TylerBloom 761 90 118ms 22 Mar 2024 678th Aurel300 🇨🇭 761 90 119ms 8 Jun 2024 682nd steffan-polygolf 759 60 377ms 7 Mar 2024 683rd ovs-code 🇩🇪 759 70 23ms 14 Dec 2024 684th lynn 759 102 31ms 18 Jul 2023 684th m-tkach 🇺🇦 759 102 31ms 7 Dec 2023 686th DialFrost 🇸🇬 758 69 115ms 5 days ago 687th janbehrens 🇩🇪 757 52 46ms 27 Nov 2022 688th SirBogman 🇺🇸 756 41 332ms 9 Jan 2024 688th dcgjb 756 41 1,753ms 31 Jan 2024 688th IISResetMe 756 41 313ms 10 Apr 2024 688th juliansiebert 🇩🇪 756 41 326ms 2 Feb 2025 692nd DialFrost 🇸🇬 755 71 48ms 7 Dec 2024 693rd Alex-x90 🇺🇸 755 97 61ms 20 Nov 2022 694th MeWhenI 🇻🇦 753 66 41ms 14 May 2023 695th aksyristos 752 66 19ms 17 Jan 2023 695th OllieBoyne 🇬🇧 752 66 19ms 28 Feb 2023 695th randolchance 752 66 19ms 12 Mar 2023 695th CheeseCake628 🇳🇴 752 66 18ms 19 Mar 2023 695th adamnielson42 🇺🇸 752 66 17ms 31 Mar 2023 695th ehulinsky 🇺🇸 752 66 18ms 8 May 2023 695th TheoKeller1 752 66 17ms 11 Jun 2023 695th dranjohn 752 66 16ms 11 Sep 2023 695th inverseLorentz 🇦🇺 752 66 19ms 23 Oct 2023 695th RedzGoose 🇦🇺 752 66 19ms 23 Oct 2024 695th JunkIce 752 66 21ms 24 Nov 2024 695th yokasuretsu 752 66 17ms 7 Jan 2025 695th croc54 752 66 17ms 13 Jan 2025 695th ejini6969 752 66 17ms 14 Jun 2025 695th osNiko 🇧🇷 752 66 17ms 20 Aug 2025 695th Troon 752 66 24ms 22 Aug 2025 711th Steffan153 🇫🇮 752 78 35ms 14 Jul 2023 711th GrayJoKing 🇦🇺 752 78 41ms 13 Aug 2023 711th kg583 🇺🇸 752 78 31ms 2 Oct 2025 714th Yewzir 🇧🇪 751 90 435ms 12 Feb 2024 715th dokutan 750 32 3ms 14 Nov 2024 716th retrohun 750 64 4,085ms 5 Nov 2023 717th Shanethegamer 🇺🇸 750 81 1,252ms 30 Nov 2022 718th inventshah 749 59 11ms 20 Nov 2022 718th Argeento 🇵🇱 749 59 12ms 26 Aug 2023 718th DialFrost 🇸🇬 749 59 14ms 5 days ago First Prev 641–720 of 1,801 Next Last