The Calendar hole will go live in approximately 7 days. Why not try and solve it ahead of time?
Factorial Factorisation 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 401st galloj 🇨🇿 664 691 1ms 16 Apr 2024 402nd MeWhenI 🇻🇦 662 132 138ms 28 Oct 2024 403rd elgan65536 660 126 15ms 13 Apr 2024 403rd inventshah 660 126 15ms 15 Apr 2024 403rd emgordon154 660 126 15ms 12 Apr 2025 403rd khaninm 660 126 13ms 3 Jun 2025 403rd fkantelberg 660 126 16ms 10 Jul 2025 403rd solisolu 660 126 683ms 5 Oct 2025 409th emgordon154 658 121 509ms 12 Apr 2025 409th snoozingnewt 🇨🇦 658 121 547ms 20 Nov 2025 411th inventshah 657 129 2ms 29 Mar 2025 412th Shanethegamer 🇺🇸 656 152 1,312ms 13 Apr 2024 413th jatloe 655 127 67ms 8 Oct 2024 413th klixel 🇨🇦 655 127 91ms 8 Apr 2025 415th emgordon154 655 173 142ms 18 Feb 2025 416th duckyluuk 🇳🇱 654 162 102ms 12 Jun 2025 417th dokutan 654 701 2ms 22 Apr 2024 418th BlankSpruce 652 130 2ms 21 Aug 2024 419th HumanoidCPU 652 167 501ms 8 Nov 2025 420th dokutan 651 130 752ms 8 Nov 2025 421st thienudomsrirungruang 650 128 310ms 15 Apr 2024 421st mathisfun271 650 128 12ms 1 Jun 2024 421st cros107 🇦🇺 650 128 15ms 12 Jan 2025 424th emgordon154 650 139 4,276ms 13 Nov 2024 425th ei14 650 706 1ms 8 May 2024 426th elgan65536 647 131 1ms 15 Apr 2024 427th MeWhenI 🇻🇦 646 140 4,126ms 24 Oct 2024 428th hellwue 645 129 12ms 21 Jun 2024 428th plcc0 645 129 156ms 23 Apr 2025 430th mousetail 🇳🇱 644 123 19ms 17 Aug 2024 431st DialFrost 🇸🇬 641 148 44ms 25 Apr 2025 432nd Artemis21 🇬🇧 640 130 19ms 15 Jan 2025 433rd msbranicky 637 125 717ms 13 Apr 2024 434th MeWhenI 🇻🇦 637 137 2ms 26 Jun 2024 435th CatsAreFluffy 636 178 127ms 3 Nov 2024 436th IsaacAlexBarden 635 131 22ms 24 Mar 2025 436th keelimeguy 🇺🇸 635 131 18ms 14 Jun 2025 438th Shanethegamer 🇺🇸 634 140 123ms 15 Apr 2024 439th typeswitch-dev 🇵🇹 633 187 9ms 25 Jun 2024 440th BambooleanLogic 🇸🇪 630 127 10ms 15 May 2024 440th FlorianCassayre 🇫🇷 630 127 13ms 5 Jun 2024 442nd StefanHabel 🇨🇦 630 132 16ms 16 Apr 2024 442nd TobyBoyne 🇬🇧 630 132 723ms 5 Mar 2025 444th blaztoma 🇱🇹 630 231 138ms 24 days ago 445th albanian-laundromat 627 127 424ms 4 Aug 2025 446th quimey 626 133 15ms 27 May 2024 446th tobyLovick 626 133 12ms 3 Mar 2025 446th wuduculfre 626 133 11ms 3 Aug 2025 449th zakariamouhid 625 128 10ms 13 Apr 2024 449th gigaprofisi 🇺🇸 625 128 12ms 23 Jul 2025 451st FlyingPenguin223 625 162 9ms 26 Sep 2024 452nd ahmetdemirag 🇨🇾 621 134 647ms 3 Feb 2025 452nd madex 🇩🇪 621 134 13ms 1 Jun 2025 452nd YAJUE114514 621 134 12ms 27 Jul 2025 452nd qpwoeirut 621 134 717ms 10 Aug 2025 456th Maznek 620 129 10ms 29 Apr 2024 456th wansacis 🇩🇪 620 129 11ms 30 Apr 2024 458th GolfingSuccess 🇬🇷 619 128 110ms 16 Aug 2024 459th arcpolaris 618 161 380ms 11 Dec 2024 460th Shanethegamer 🇺🇸 618 210 261ms 14 Apr 2024 461st FranklinJiaChen 616 135 16ms 30 Jul 2024 462nd niklv 🇷🇺 615 130 10ms 14 Apr 2024 462nd two-bad 🇬🇧 615 130 9ms 4 May 2024 462nd GeorgeStechman 🇬🇧 615 130 10ms 4 May 2024 462nd didion0 🇺🇸 615 130 11ms 26 Aug 2025 466th moustave 612 136 11ms 25 Mar 2025 467th msbranicky 612 145 136ms 13 Apr 2024 468th emgordon154 610 130 365ms 5 Sep 2024 469th iczelia 🇩🇪 610 139 1ms 22 Sep 2025 470th snoozingnewt 🇨🇦 608 120 88ms 12 Sep 2025 471st MeWhenI 🇻🇦 608 131 523ms 24 May 2024 472nd galloj 🇨🇿 607 137 12ms 13 Apr 2024 472nd Rubiksmath 607 137 15ms 29 Sep 2024 472nd andrewjc2000 607 137 2,491ms 28 Jul 2025 472nd SectorCorruptor 607 137 19ms 21 Sep 2025 476th AutumnWind75 607 176 403ms 14 days ago 477th luuumine 🇫🇷 606 187 132ms 16 days ago 478th madex 🇩🇪 605 140 2ms 9 Jun 2025 479th yoshykai 605 180 384ms 29 Mar 2025 479th h3ra993huskp 🇯🇵 605 180 442ms 24 days ago First Prev 401–480 of 1,428 Next Last