The Calendar hole will go live in approximately 11 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 targrik 466 171 14ms 14 Feb 2025 562nd TanguyBarthelemy 465 145 169ms 24 Oct 2024 563rd msbranicky 463 172 10ms 21 Apr 2024 564th RYNO8 462 143 66ms 14 Jun 2024 564th OllieBoyne 🇬🇧 462 143 21ms 5 Mar 2025 564th BREMAUCY 🇫🇷 462 143 708ms 24 Jul 2025 564th kistlerf 🇨🇭 462 143 12ms 8 Nov 2025 564th Emutis 🇱🇹 462 143 14ms 12 Nov 2025 569th msbranicky 462 167 1,039ms 16 Apr 2024 570th Sp3000 🇦🇺 459 124 38ms 31 May 2024 571st jiaminglimjm 🇲🇾 459 144 11ms 6 Jul 2024 571st Bmrl7 459 144 16ms 27 days ago 573rd commandblockguy 🇺🇸 456 139 647ms 1 Sep 2025 574th Andrey135296 456 145 52ms 9 Nov 2024 575th ThijsLuttikhuis 453 146 15ms 13 Apr 2024 575th mbittner20 453 146 13ms 30 Jun 2024 575th scpchicken 🇵🇼 453 146 15ms 31 Jul 2024 578th Natanaelel 🇸🇪 452 87 19ms 16 Apr 2024 579th msbranicky 450 217 44ms 20 Apr 2024 580th JOrE20 🇺🇸 449 147 10ms 13 days ago 581st retrohun 448 659 1ms 23 Aug 2025 582nd dokutan 447 288 3ms 9 days ago 583rd gsprochette 443 149 19ms 21 Aug 2025 584th msbranicky 443 245 405ms 21 Apr 2024 585th inventshah 442 668 2ms 19 Apr 2024 586th jtaxen 440 150 87ms 14 Apr 2024 587th MeWhenI 🇻🇦 440 671 2ms 22 Apr 2024 588th EnTerr 438 151 21ms 16 Jun 2024 588th dirckvdende 438 151 22ms 23 Jul 2025 590th agreegious 435 152 15ms 17 Nov 2024 591st shelerr 429 154 32ms 21 Aug 2025 591st mathieurodic 429 154 923ms 28 Oct 2025 593rd Ripick 428 270 332ms 15 Aug 2024 594th galloj 🇨🇿 427 691 1ms 16 Apr 2024 595th WillowWispy 426 155 17ms 25 May 2025 596th blaztoma 🇱🇹 424 160 332ms 12 Oct 2025 597th dokutan 422 161 755ms 20 Jun 2024 598th luuumine 🇫🇷 421 157 17ms 19 days ago 599th dokutan 421 701 2ms 22 Apr 2024 600th msbranicky 420 237 3,354ms 18 Apr 2024 601st stertooy 🇧🇪 418 158 20ms 14 Jun 2024 601st codingisgreatbutiamnot 418 158 12ms 6 Jul 2025 603rd ei14 418 706 1ms 8 May 2024 604th sacredeux 416 159 17ms 27 Aug 2024 604th hiichbindermax 416 159 22ms 11 Sep 2024 606th emgordon154 414 143 55ms 26 Jul 2024 607th inverseLorentz 🇦🇺 413 160 19ms 24 Jun 2024 608th Natanaelel 🇸🇪 410 161 21ms 15 Apr 2024 608th CatsAreFluffy 410 161 40ms 29 Apr 2024 608th cykim8811 410 161 15ms 9 Jul 2024 611th yuchuehw 408 162 89ms 14 May 2024 612th Yewzir 🇧🇪 407 464 1,729ms 5 Jun 2024 613th msbranicky 406 178 21ms 16 Apr 2024 614th LostSyntax21 🇬🇧 405 146 37ms 23 Aug 2024 615th ei14 403 247 2,079ms 8 May 2024 616th Malizma333 400 165 22ms 31 Oct 2024 617th snoozingnewt 🇨🇦 400 248 420ms 9 Oct 2025 618th a6166231 🇨🇳 398 200 10ms 15 May 2025 619th jfallon1997 386 171 27ms 17 Apr 2024 619th Mabeloid 🇳🇴 386 171 21ms 17 Sep 2024 621st tomh1012 386 257 434ms 16 days ago 622nd f-tucker 384 172 32ms 24 May 2024 623rd msbranicky 375 158 64ms 16 Apr 2024 624th TheAtrossian 375 176 17ms 5 Jan 2025 625th corbob 🇨🇦 375 193 324ms 3 May 2024 626th stefangimmillaro 374 790 1ms 6 Nov 2025 627th jacekwladzinski 373 177 10ms 5 Oct 2025 627th TheZwierzLF 🇵🇱 373 177 23ms 7 hours ago 629th Mabeloid 🇳🇴 371 171 764ms 17 Sep 2024 630th Code-Coder-coder 371 178 33ms 27 days ago 631st msbranicky 371 183 234ms 14 Apr 2024 632nd robin-scragg 369 179 20ms 27 Jul 2025 633rd Bodo171 367 180 32ms 30 Dec 2024 634th TheZwierzLF 🇵🇱 366 173 837ms 7 hours ago 635th TRexOnGit 366 218 18ms 22 Jul 2025 636th resoNathan 365 181 39ms 25 Apr 2024 637th adamnielson42 🇺🇸 361 183 19ms 23 Apr 2024 638th SURAJMITTAL 359 184 31ms 20 Dec 2024 639th yasna-nsh 357 185 25ms 7 Oct 2025 640th ei14 355 186 51ms 8 May 2024 First Prev 561–640 of 1,416 Next Last