The Calendar hole will go live in approximately 6 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 640th ItsEthanXYZ 433 192 33ms 16 Nov 2024 640th croc54 433 192 19ms 30 Dec 2024 640th kadamkaustubh 433 192 20ms 3 Oct 2025 644th codewrite 🇬🇧 431 193 15ms 11 Jun 2025 645th Ripick 430 270 332ms 15 Aug 2024 646th Mabeloid 🇳🇴 424 196 19ms 23 Sep 2024 647th corbob 🇨🇦 422 193 322ms 3 May 2024 648th msbranicky 422 237 2,650ms 18 Apr 2024 649th NerdyMcNerd42 416 200 40ms 20 Feb 2025 650th wobblybits 412 202 14ms 24 Aug 2025 651st adoxography 410 203 19ms 27 Apr 2024 652nd msbranicky 409 178 21ms 16 Apr 2024 653rd Yewzir 🇧🇪 408 464 1,729ms 5 Jun 2024 654th KatieLG 🇬🇧 408 1,124 1ms 13 Apr 2024 655th JunkIce 406 205 16ms 3 Dec 2024 655th Flekay 🇩🇪 406 205 18ms 10 Jul 2025 655th Andrey2001 406 205 26ms 20 days ago 658th ei14 405 247 1,994ms 8 May 2024 659th Mabeloid 🇳🇴 404 197 739ms 17 Sep 2024 659th JunkIce 404 197 600ms 8 Jan 2025 661st aalec 404 206 15ms 23 Apr 2024 662nd snoozingnewt 🇨🇦 401 248 420ms 9 Oct 2025 663rd a6166231 🇨🇳 400 200 10ms 15 May 2025 664th msbranicky 391 186 226ms 14 Apr 2024 665th RaBa21 🇭🇺 391 213 55ms 19 Jul 2025 666th JPRuskin 🇬🇧 390 209 649ms 25 Apr 2024 667th Languag3 387 215 12ms 10 Oct 2024 668th tomh1012 387 257 434ms 20 days ago 669th saito-ta 🇯🇵 379 1,211 1ms 25 Apr 2024 670th rollsroyce0 371 224 653ms 11 Sep 2024 671st kmathis22 371 243 62ms 37 hours ago 672nd aksyristos 370 225 16ms 5 Nov 2024 673rd TRexOnGit 367 218 18ms 22 Jul 2025 674th FortuiteMan 🇫🇷 367 227 10ms 16 Oct 2024 675th sciencejiho 363 229 18ms 26 Apr 2024 675th julian-hoelz 363 229 15ms 22 Sep 2024 677th mdnestor 360 231 53ms 2 Jul 2024 678th msbranicky 359 180 188ms 16 Apr 2024 679th gnuvince 355 112 24ms 29 Jun 2025 680th nstearns96 🇬🇧 353 236 2,166ms 21 Jan 2025 681st msbranicky 353 300 1,135ms 14 Jan 2025 682nd kevinnaviapaiva 345 321 181ms 6 Mar 2025 683rd yzhs 🇩🇪 341 244 24ms 17 Jan 2025 684th madeforlosers 337 237 10ms 5 Dec 2024 685th Andrey2001 328 243 704ms 26 Nov 2025 686th cthierfelder 🇲🇨 325 256 51ms 8 Sep 2025 687th vhoulbreque 🇫🇷 324 257 37ms 11 Feb 2025 688th Alex-Huggett 🇬🇧 323 308 405ms 14 Apr 2024 689th ComputerKWasTaken 🇺🇸 322 258 10ms 1 Jul 2024 690th aksyristos 322 263 1ms 5 Nov 2024 691st Giantnoodlemonster 316 268 2ms 6 Oct 2024 692nd dokutan 312 467 98ms 12 days ago 693rd kevinnaviapaiva 309 322 346ms 28 Feb 2025 694th roguh 🇬🇹 305 273 11ms 13 Oct 2024 694th kevinnaviapaiva 305 273 12ms 6 Mar 2025 696th dokutan 303 558 391ms 12 days ago 697th kevinnaviapaiva 301 355 1,065ms 6 Mar 2025 698th Jonatan6 🇩🇰 297 285 2ms 17 Apr 2024 699th kevinnaviapaiva 296 293 7ms 6 Mar 2025 700th sidok 295 246 600ms 26 Apr 2024 701st KatieLG 🇬🇧 291 509 733ms 17 Apr 2024 702nd dokutan 287 893 10ms 8 Oct 2024 703rd MeWhenI 🇻🇦 284 905 10ms 13 Apr 2024 703rd BREMAUCY 🇫🇷 284 905 10ms 15 Apr 2024 703rd Steffan153 🇫🇮 284 905 10ms 2 Aug 2024 703rd KatieLG 🇬🇧 284 905 10ms 26 Sep 2024 703rd CaedenHarper 🇨🇦 284 905 10ms 24 Jan 2025 708th HumanoidCPU 278 924 10ms 21 days ago 709th Mabeloid 🇳🇴 276 929 10ms 17 Sep 2024 710th madex 🇩🇪 272 252 45ms 15 Apr 2024 711th robin-scragg 270 308 20ms 27 Jul 2025 712th kevinnaviapaiva 260 308 9ms 6 Mar 2025 713th kevinnaviapaiva 260 419 373ms 6 Mar 2025 714th dokutan 254 510 3ms 19 days ago 715th Zhenyu-Bo 249 334 10ms 31 Jul 2025 716th dokutan 249 453 66ms 12 days ago 717th Msleizak 🇫🇷 243 335 271ms 4 Jul 2025 718th deancureton 239 334 11ms 29 Dec 2024 719th kevinnaviapaiva 239 354 2ms 6 Mar 2025 720th hacoobamatata 231 472 449ms 29 Aug 2024 First Prev 641–720 of 1,431 Next Last