The Calendar hole will go live in approximately 15 hours. 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 880th neel11235813 676 42 192ms 3 Feb 2023 882nd MeWhenI 🇻🇦 676 100 434ms 9 Apr 2024 883rd CaedenHarper 🇨🇦 675 128 244ms 5 Oct 2025 884th emgordon154 674 87 34ms 19 Mar 2025 885th annaproxy 673 94 356ms 22 Oct 2023 886th gjoacorp 🇬🇧 672 109 62ms 4 Aug 2025 887th Anthony-Williams-06 671 74 17ms 12 Sep 2024 888th janbehrens 🇩🇪 671 79 4ms 20 Nov 2022 888th weliveinhell 🇭🇹 671 79 4ms 21 May 2024 890th helbling 🇨🇭 670 66 11ms 5 Apr 2024 890th snoozingnewt 🇨🇦 670 66 18ms 10 hours ago 892nd kkoenig 670 129 282ms 2 Jan 2024 892nd dokutan 670 129 315ms 10 Mar 2025 894th Steffan153 🇫🇮 668 71 5ms 20 Nov 2022 895th ejini6969 667 59 59ms 14 Jun 2025 896th MeWhenI 🇻🇦 666 79 95ms 7 Aug 2023 897th namcartoon06 666 110 59ms 15 Jul 2023 898th dokutan 664 66 139ms 7 Aug 2024 899th snoozingnewt 🇨🇦 663 102 417ms 9 Oct 2025 900th CedricGebistorf 662 75 24ms 4 May 2023 900th namelessiw 662 75 26ms 11 Jan 2024 900th robin-scragg 662 75 25ms 25 Jun 2025 903rd Yewzir 🇧🇪 662 80 4ms 12 Feb 2024 903rd dokutan 662 80 4ms 23 Mar 2024 905th SirBogman 🇺🇸 661 51 903ms 22 Nov 2022 905th janbehrens 🇩🇪 661 51 1,065ms 27 Nov 2022 907th dokutan 661 70 9ms 19 Nov 2025 908th snoozingnewt 🇨🇦 661 71 8ms 9 Oct 2025 909th Steffan153 🇫🇮 661 251 53ms 2 Aug 2023 910th JRaspass 🇬🇧 660 43 159ms 19 Nov 2022 910th SirBogman 🇺🇸 660 43 194ms 20 Nov 2022 912th fuzzylojik-golf 🇺🇸 660 67 41ms 9 Jul 2025 913th msbranicky 658 80 79ms 10 Sep 2023 914th MeWhenI 🇻🇦 656 171 1,690ms 7 Nov 2025 915th SirBogman 🇺🇸 656 253 79ms 22 Nov 2022 916th albanian-laundromat 655 192 536ms 20 Oct 2025 917th aksyristos 654 112 61ms 23 Jan 2023 918th MeWhenI 🇻🇦 654 121 14ms 9 Apr 2024 919th jacksonhenry3 653 76 23ms 2 Dec 2022 919th Irratix 🇳🇱 653 76 23ms 31 Jan 2023 919th NoahBolohan 🇨🇦 653 76 27ms 8 Feb 2023 919th Andrey2001 653 76 23ms 21 days ago 923rd MeWhenI 🇻🇦 652 71 8ms 10 Oct 2023 924th stefangimmillaro 652 86 105ms 20 Nov 2022 925th MeWhenI 🇻🇦 652 105 122ms 9 Apr 2024 926th epic-programmer-guy 651 70 589ms 15 Apr 2024 926th Stockoh 🇫🇷 651 70 565ms 24 Jun 2024 928th MeWhenI 🇻🇦 651 72 7ms 9 Apr 2024 929th Maznek 650 68 12ms 3 Jul 2023 930th akamayu-ouo 🇹🇼 649 37 3ms 30 Jul 2024 931st MeWhenI 🇻🇦 648 52 1,052ms 12 May 2023 932nd dokutan 646 98 395ms 2 Dec 2025 933rd Yewzir 🇧🇪 645 61 56ms 14 Feb 2024 933rd lacrosse 645 61 57ms 28 Nov 2025 935th GolfingSuccess 🇬🇷 645 195 489ms 19 Jan 2025 936th albanian-laundromat 644 96 45ms 22 Aug 2025 937th Betuaredead 643 114 1,423ms 8 Jan 2023 938th Jacob385 642 71 377ms 18 Apr 2024 939th MeWhenI 🇻🇦 642 92 45ms 14 Feb 2025 939th AlephSquirrel 642 92 48ms 21 Mar 2025 941st NickTheEASDude 🇺🇸 641 69 12ms 1 May 2024 942nd sean-niemann 🇺🇸 641 74 6ms 4 Apr 2023 943rd MeWhenI 🇻🇦 641 89 128ms 27 Jul 2024 944th Shanethegamer 🇺🇸 640 121 31ms 31 Mar 2025 945th inventshah 640 155 3,614ms 23 Mar 2023 945th retrohun 640 155 154ms 27 Sep 2025 947th emgordon154 638 83 5ms 20 Mar 2025 947th iczelia 🇩🇪 638 83 4ms 5 Nov 2025 949th Yewzir 🇧🇪 637 67 788ms 15 Nov 2025 950th Europe2048 637 78 32ms 4 Dec 2024 951st dokutan 637 88 102ms 2 May 2024 951st snoozingnewt 🇨🇦 637 88 103ms 9 Oct 2025 953rd HumanoidCPU 637 108 441ms 8 Nov 2025 954th retrohun 637 115 62ms 28 Dec 2022 955th KatieLG 🇬🇧 635 62 48ms 2 Oct 2025 956th dokutan 634 177 1,654ms 2 Nov 2025 957th UnderKoen 🇳🇱 633 125 551ms 20 Apr 2023 958th janbehrens 🇩🇪 632 76 221ms 20 Nov 2022 959th Yewzir 🇧🇪 631 56 4ms 14 Feb 2024 960th eranws 631 70 12ms 23 Dec 2024 First Prev 881–960 of 1,806 Next Last