The Calendar hole will go live in approximately 4 days. Why not try and solve it ahead of time?
Factorial Factorisation 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 561st commandblockguy 🇺🇸 469 141 67ms 13 Apr 2024 561st Pyroan 469 141 38ms 16 Apr 2025 561st CommandLeo 🇮🇹 469 141 22ms 19 Nov 2025 561st Bmrl7 469 141 25ms 4 days ago 565th Kokusui 🇯🇵 469 184 788ms 18 Jun 2024 566th targrik 466 171 14ms 14 Feb 2025 567th TanguyBarthelemy 465 145 169ms 24 Oct 2024 568th msbranicky 463 167 24ms 18 Apr 2024 569th msbranicky 463 172 10ms 21 Apr 2024 570th RYNO8 462 143 66ms 14 Jun 2024 570th OllieBoyne 🇬🇧 462 143 21ms 5 Mar 2025 570th BREMAUCY 🇫🇷 462 143 708ms 24 Jul 2025 570th kistlerf 🇨🇭 462 143 12ms 8 Nov 2025 570th Emutis 🇱🇹 462 143 14ms 12 Nov 2025 575th msbranicky 462 167 1,039ms 16 Apr 2024 576th Sp3000 🇦🇺 459 124 38ms 31 May 2024 577th jiaminglimjm 🇲🇾 459 144 11ms 6 Jul 2024 578th commandblockguy 🇺🇸 456 139 647ms 1 Sep 2025 579th Andrey135296 456 145 52ms 9 Nov 2024 580th ThijsLuttikhuis 453 146 15ms 13 Apr 2024 580th mbittner20 453 146 13ms 30 Jun 2024 580th scpchicken 🇵🇼 453 146 15ms 31 Jul 2024 583rd Natanaelel 🇸🇪 452 87 19ms 16 Apr 2024 584th msbranicky 450 217 44ms 20 Apr 2024 585th JOrE20 🇺🇸 449 147 10ms 20 days ago 586th dokutan 449 287 4ms 19 hours ago 587th retrohun 448 659 1ms 23 Aug 2025 588th gsprochette 443 149 19ms 21 Aug 2025 589th msbranicky 443 245 405ms 21 Apr 2024 590th inventshah 442 668 2ms 19 Apr 2024 591st jtaxen 440 150 87ms 14 Apr 2024 592nd MeWhenI 🇻🇦 440 671 2ms 22 Apr 2024 593rd EnTerr 438 151 21ms 16 Jun 2024 593rd dirckvdende 438 151 22ms 23 Jul 2025 595th agreegious 435 152 15ms 17 Nov 2024 596th shelerr 429 154 32ms 21 Aug 2025 596th mathieurodic 429 154 923ms 28 Oct 2025 598th Ripick 428 270 332ms 15 Aug 2024 599th galloj 🇨🇿 427 691 1ms 16 Apr 2024 600th WillowWispy 426 155 17ms 25 May 2025 601st blaztoma 🇱🇹 424 160 284ms 12 Oct 2025 602nd dokutan 422 161 594ms 20 Jun 2024 603rd JOrE20 🇺🇸 422 189 10ms 64 mins ago 604th luuumine 🇫🇷 421 157 17ms 26 days ago 605th dokutan 421 701 2ms 22 Apr 2024 606th msbranicky 420 237 2,650ms 18 Apr 2024 607th stertooy 🇧🇪 418 158 20ms 14 Jun 2024 607th codingisgreatbutiamnot 418 158 12ms 6 Jul 2025 609th ei14 418 706 1ms 8 May 2024 610th sacredeux 416 159 17ms 27 Aug 2024 610th hiichbindermax 416 159 22ms 11 Sep 2024 612th emgordon154 414 143 53ms 26 Jul 2024 613th inverseLorentz 🇦🇺 413 160 19ms 24 Jun 2024 614th Natanaelel 🇸🇪 410 161 21ms 15 Apr 2024 614th CatsAreFluffy 410 161 40ms 29 Apr 2024 614th cykim8811 410 161 15ms 9 Jul 2024 617th yuchuehw 408 162 89ms 14 May 2024 618th Yewzir 🇧🇪 407 464 1,729ms 5 Jun 2024 619th msbranicky 406 178 21ms 16 Apr 2024 620th LostSyntax21 🇬🇧 405 146 45ms 23 Aug 2024 621st ei14 403 247 1,994ms 8 May 2024 622nd Malizma333 400 165 22ms 31 Oct 2024 623rd snoozingnewt 🇨🇦 400 248 420ms 9 Oct 2025 624th a6166231 🇨🇳 398 200 10ms 15 May 2025 625th jfallon1997 386 171 27ms 17 Apr 2024 625th Mabeloid 🇳🇴 386 171 21ms 17 Sep 2024 627th tomh1012 386 257 434ms 23 days ago 628th f-tucker 384 172 32ms 24 May 2024 629th msbranicky 375 158 48ms 16 Apr 2024 630th TheAtrossian 375 176 17ms 5 Jan 2025 631st corbob 🇨🇦 375 193 322ms 3 May 2024 632nd stefangimmillaro 374 790 1ms 6 Nov 2025 633rd jacekwladzinski 373 177 10ms 5 Oct 2025 633rd TheZwierzLF 🇵🇱 373 177 16ms 7 days ago 635th Mabeloid 🇳🇴 371 171 764ms 17 Sep 2024 636th Code-Coder-coder 371 178 33ms 23 Nov 2025 637th msbranicky 371 183 226ms 14 Apr 2024 638th kmathis22 370 243 62ms 3 days ago 639th robin-scragg 369 179 20ms 27 Jul 2025 640th Bodo171 367 180 32ms 30 Dec 2024 First Prev 561–640 of 1,422 Next Last