The Calendar hole will go live in approximately 7 days. Why not try and solve it ahead of time?
Factorial Factorisation in Ruby 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 1st xsot 🇸🇬 1,000 72 46ms 13 Apr 2024 1st Natanaelel 🇸🇪 1,000 72 50ms 13 Apr 2024 1st ovs-code 🇩🇪 1,000 72 45ms 13 Apr 2024 1st JayXon 🇺🇸 1,000 72 47ms 19 Apr 2024 1st nwellnhof 🇩🇪 1,000 72 45ms 22 Apr 2024 1st radarek 🇵🇱 1,000 72 45ms 7 Jul 2024 1st sean-niemann 🇺🇸 1,000 72 43ms 29 Jul 2024 1st janlelis 1,000 72 47ms 21 Sep 2024 1st sisyphus-ppcg 🇦🇺 1,000 72 49ms 5 Jan 2025 10th TFeld00 🇩🇰 986 73 42ms 3 Sep 2024 11th SirBogman 🇺🇸 960 75 46ms 18 Apr 2024 12th anter69 🇭🇺 947 76 46ms 25 Oct 2024 12th D-MOVE 🇵🇭 947 76 43ms 15 days ago 14th GrayJoKing 🇦🇺 923 78 38ms 16 Apr 2024 14th pardouin 🇫🇷 923 78 461ms 9 Sep 2025 16th error256 900 80 48ms 1 May 2024 16th DialFrost 🇸🇬 900 80 47ms 2 Jun 2024 16th plcc0 900 80 49ms 4 Oct 2025 16th KatieLG 🇬🇧 900 80 44ms 11 Oct 2025 20th blaztoma 🇱🇹 889 81 46ms 12 Oct 2025 20th lacrosse 889 81 42ms 25 days ago 22nd stefangimmillaro 867 83 45ms 13 Apr 2024 22nd MeWhenI 🇻🇦 867 83 41ms 29 Dec 2024 22nd tatzyr 🇯🇵 867 83 46ms 15 Feb 2025 25th Shanethegamer 🇺🇸 847 85 46ms 13 Apr 2024 25th Just4FunCoder 847 85 41ms 18 Jun 2025 27th TheZwierzLF 🇵🇱 800 90 53ms 3 days ago 28th neel11235813 783 92 46ms 14 Apr 2024 29th BREMAUCY 🇫🇷 774 93 43ms 15 Apr 2024 30th olleicua 🇺🇸 713 101 107ms 23 Apr 2024 31st beergit 621 116 42ms 7 Aug 2024 32nd adoxography 590 122 41ms 27 Apr 2024 33rd emgordon154 503 143 55ms 26 Jul 2024 34th LostSyntax21 🇬🇧 493 146 37ms 23 Aug 2024 35th msbranicky 456 158 50ms 16 Apr 2024 36th madex 🇩🇪 286 252 45ms 15 Apr 2024 37th dokutan 109 659 34ms 21 Apr 2025 38th HumanoidCPU 83 867 35ms 13 Apr 2024 38th Yewzir 🇧🇪 83 867 36ms 13 Apr 2024 38th bac0id 83 867 33ms 26 Jun 2024 38th Mabeloid 🇳🇴 83 867 32ms 17 Sep 2024 38th CaedenHarper 🇨🇦 83 867 35ms 22 Jan 2025 43rd KatieLG-Transpiler 🇬🇧 82 873 36ms 16 Aug 2024 1–43 of 43