The Calendar hole will go live in approximately 12 days. Why not try and solve it ahead of time?
Niven Numbers (Long) in Go 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 1st Lydxn 🇨🇦 1,000 97 276ms 13 Aug 2023 1st JayXon 🇺🇸 1,000 97 273ms 13 Aug 2023 1st nwellnhof 🇩🇪 1,000 97 281ms 22 Oct 2024 4th kkoenig 990 98 261ms 8 Jan 2024 5th Steffan153 🇫🇮 960 101 270ms 17 Dec 2022 5th MeWhenI 🇻🇦 960 101 268ms 21 Feb 2023 5th stefangimmillaro 960 101 278ms 14 Jun 2023 5th sean-niemann 🇺🇸 960 101 258ms 17 Jun 2023 5th Yewzir 🇧🇪 960 101 271ms 10 Apr 2024 5th pardouin 🇫🇷 960 101 266ms 20 Oct 2024 5th fuzzylojik-golf 🇺🇸 960 101 268ms 15 Jul 2025 5th b-illy 🇬🇧 960 101 255ms 34 hours ago 13th primo-ppcg 🇹🇭 951 102 268ms 4 Sep 2022 13th m-tkach 🇺🇦 951 102 266ms 14 Jun 2023 13th DialFrost 🇸🇬 951 102 258ms 11 Apr 2025 13th CaedenHarper 🇨🇦 951 102 342ms 10 days ago 17th sisyphus-ppcg 🇦🇺 942 103 268ms 8 Aug 2022 17th GrayJoKing 🇦🇺 942 103 262ms 14 Aug 2022 19th KasperKivimaeki 🇫🇮 907 107 255ms 3 Oct 2025 20th emplv 🇱🇻 890 109 276ms 26 Oct 2023 21st Shanethegamer 🇺🇸 874 111 269ms 21 Nov 2023 21st emgordon154 874 111 261ms 17 Jan 2025 21st 0xjac 🇨🇭 874 111 268ms 17 Jun 2025 24th msbranicky 866 112 274ms 3 Oct 2023 24th jerrandolph 866 112 272ms 22 Dec 2023 26th ridingqwerty 🇺🇸 858 113 281ms 23 Jul 2025 26th snoozingnewt 🇨🇦 858 113 264ms 30 Sep 2025 28th jupj 🇫🇮 851 114 268ms 12 Aug 2022 29th dokutan 843 115 264ms 23 Mar 2024 30th destofr 822 118 271ms 23 Aug 2022 31st hjo33 815 119 272ms 25 Aug 2022 32nd Intevel 🇩🇪 752 129 267ms 4 Jul 2023 33rd elgan65536 713 136 277ms 23 Oct 2023 34th j-Ewan 703 138 278ms 9 Feb 2023 35th Bodo171 533 182 273ms 15 Jan 2023 36th eli-siegel 357 272 276ms 28 Jun 2023 37th HumanoidCPU 326 298 285ms 26 Aug 2024 38th JRaspass 🇬🇧 167 582 270ms 23 Sep 2022 39th KatieLG 🇬🇧 17 5,794 261ms 18 days ago 40th KatieLG-Transpiler 🇬🇧 13 7,488 271ms 8 Aug 2022 41st retrohun 11 9,027 270ms 28 Dec 2022 41st Mabeloid 🇳🇴 11 9,027 266ms 22 Sep 2024 1–42 of 42
