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 561st stertooy 🇧🇪 527 158 20ms 14 Jun 2024 561st codingisgreatbutiamnot 527 158 12ms 6 Jul 2025 563rd alemelis 526 138 713ms 19 Aug 2024 564th msbranicky 526 189 380ms 13 Apr 2024 565th jerrandolph 526 247 271ms 23 Sep 2025 566th sacredeux 523 159 17ms 27 Aug 2024 566th hiichbindermax 523 159 22ms 11 Sep 2024 568th Natanaelel 🇸🇪 523 162 2ms 17 Apr 2024 569th HumanoidCPU 521 153 724ms 9 May 2025 570th Apataras 521 209 386ms 2 Aug 2025 571st inverseLorentz 🇦🇺 520 160 19ms 24 Jun 2024 572nd Shanethegamer 🇺🇸 520 163 3ms 13 Apr 2024 573rd MeWhenI 🇻🇦 518 153 22ms 16 Aug 2024 574th rifatx 518 192 424ms 10 Jul 2024 575th Natanaelel 🇸🇪 517 161 21ms 15 Apr 2024 575th CatsAreFluffy 517 161 40ms 29 Apr 2024 575th cykim8811 517 161 15ms 9 Jul 2024 578th 1231234md5 🇨🇳 516 155 10ms 4 May 2024 578th R4z0rX 516 155 27ms 29 Aug 2024 580th yuchuehw 514 162 89ms 14 May 2024 581st janAkali 🇷🇺 513 226 374ms 31 Jan 2025 582nd CaedenHarper 🇨🇦 513 253 288ms 12 Nov 2025 583rd LHLaurini 🇧🇷 507 167 3ms 29 Apr 2024 584th msbranicky 506 211 66ms 14 Apr 2024 585th sultan 506 215 388ms 15 Apr 2024 586th Malizma333 504 165 22ms 31 Oct 2024 587th TanguyBarthelemy 503 145 169ms 24 Oct 2024 588th dbut2 🇦🇺 503 258 278ms 16 Jul 2025 589th ei14 501 169 2ms 8 May 2024 590th mousetail 🇳🇱 497 119 80ms 13 Apr 2024 591st snoozingnewt 🇨🇦 493 172 3ms 18 Jun 2024 592nd msbranicky 492 176 8ms 16 Apr 2024 593rd brimstonetrader 491 211 202ms 16 Apr 2024 594th jfallon1997 487 171 27ms 17 Apr 2024 595th msbranicky 487 174 2ms 14 Apr 2024 595th yuchuehw 487 174 3ms 12 Jun 2024 597th msbranicky 486 167 24ms 18 Apr 2024 598th f-tucker 484 172 32ms 24 May 2024 599th kevinnaviapaiva 483 392 25ms 28 Feb 2025 600th madex 🇩🇪 482 166 10ms 6 Jun 2024 601st emgordon154 482 307 712ms 10 Jun 2025 602nd msbranicky 481 220 118ms 17 Apr 2024 603rd emgordon154 479 143 55ms 26 Jul 2024 604th plastic-bottle 475 229 417ms 27 Aug 2025 605th snoozingnewt 🇨🇦 473 169 12ms 9 Oct 2025 606th TheAtrossian 473 176 17ms 5 Jan 2025 607th tobeannouncd 473 219 221ms 29 Apr 2024 608th Kokusui 🇯🇵 471 184 788ms 18 Jun 2024 609th CaedenHarper 🇨🇦 471 231 796ms 8 Oct 2025 610th jacekwladzinski 470 177 10ms 5 Oct 2025 610th TheZwierzLF 🇵🇱 470 177 16ms 4 days ago 612th Sp3000 🇦🇺 469 126 38ms 31 May 2024 613th LostSyntax21 🇬🇧 469 146 37ms 23 Aug 2024 614th targrik 468 171 14ms 14 Feb 2025 615th Code-Coder-coder 467 178 33ms 23 Nov 2025 616th msbranicky 465 167 1,039ms 16 Apr 2024 617th msbranicky 465 172 10ms 21 Apr 2024 618th KatieLG 🇬🇧 465 179 16ms 13 Apr 2024 619th Bodo171 462 180 32ms 30 Dec 2024 620th TheZwierzLF 🇵🇱 461 173 622ms 4 days ago 621st resoNathan 460 181 39ms 25 Apr 2024 622nd Natanaelel 🇸🇪 457 87 19ms 16 Apr 2024 623rd adamnielson42 🇺🇸 455 183 19ms 23 Apr 2024 624th blaztoma 🇱🇹 454 160 284ms 12 Oct 2025 625th SURAJMITTAL 452 184 31ms 20 Dec 2024 626th yasna-nsh 450 185 25ms 7 Oct 2025 627th ei14 447 186 51ms 8 May 2024 628th dokutan 446 163 336ms 20 Jun 2024 629th KatieLG 🇬🇧 445 179 684ms 13 Apr 2024 630th Stockoh 🇫🇷 445 187 12ms 26 Apr 2024 631st msbranicky 444 245 405ms 21 Apr 2024 632nd XioR112 🇵🇱 440 189 32ms 3 Jun 2024 633rd Alex-Huggett 🇬🇧 438 190 27ms 14 Apr 2024 634th 77Tigers 436 191 13ms 19 Apr 2024 634th wh3n3v3r 🇨🇿 436 191 25ms 14 Nov 2024 634th Troon 436 191 23ms 6 Dec 2024 637th msbranicky 433 158 50ms 16 Apr 2024 638th gallium-gonzollium 433 192 37ms 26 Aug 2024 638th ItsEthanXYZ 433 192 33ms 16 Nov 2024 638th croc54 433 192 19ms 30 Dec 2024 First Prev 561–640 of 1,429 Next Last