The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Happy Numbers (Long) 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 241st MeWhenI 🇻🇦 897 66 11ms 19 Sep 2021 241st sisyphus-ppcg 🇦🇺 897 66 10ms 20 Sep 2021 241st Irratix 🇳🇱 897 66 10ms 15 Dec 2021 241st DialFrost 🇸🇬 897 66 10ms 28 Jan 2023 241st Argeento 🇵🇱 897 66 11ms 26 Aug 2023 246th JayXon 🇺🇸 897 95 119ms 27 Sep 2021 246th Lydxn 🇨🇦 897 95 122ms 16 May 2023 248th primo-ppcg 🇹🇭 897 110 439ms 22 Sep 2021 249th JayXon 🇺🇸 896 84 101ms 22 Sep 2021 250th GrayJoKing 🇦🇺 895 74 3,392ms 16 Jun 2022 250th GrayJoKing 🇦🇺 895 74 17ms 1 Nov 2023 250th JayXon 🇺🇸 895 74 2,751ms 19 Jul 2025 253rd GrayJoKing 🇦🇺 895 90 541ms 10 Sep 2022 254th DialFrost 🇸🇬 893 104 444ms 16 Nov 2025 255th bastatom 893 132 260ms 27 Feb 2024 255th emgordon154 893 132 261ms 17 Jan 2025 257th dvargas46 🇺🇸 892 56 378ms 15 Nov 2022 258th prplz 🇦🇺 892 76 165ms 27 Sep 2021 258th YAJUE114514 892 76 153ms 30 Jul 2025 260th JayXon 🇺🇸 892 77 22ms 26 Nov 2021 260th ovs-code 🇩🇪 892 77 4ms 4 Nov 2023 262nd GrayJoKing 🇦🇺 892 80 12ms 13 Aug 2023 262nd btnlq 892 80 12ms 22 Oct 2023 264th GolfingSuccess 🇬🇷 892 81 5ms 19 Mar 2025 264th sean-niemann 🇺🇸 892 81 2ms 19 Nov 2025 266th typeswitch-dev 🇵🇹 892 94 4ms 2 Aug 2023 267th KasperKivimaeki 🇫🇮 891 106 86ms 6 days ago 268th Steffan153 🇫🇮 889 63 442ms 16 Jan 2024 268th GrayJoKing 🇦🇺 889 63 577ms 23 Jul 2024 268th GolfingSuccess 🇬🇷 889 63 420ms 25 Jan 2025 271st AlephSquirrel 889 111 438ms 17 Feb 2024 272nd GrayJoKing 🇦🇺 888 84 27ms 31 Jan 2025 273rd SirBogman 🇺🇸 887 86 39ms 2 Nov 2022 274th GrayJoKing 🇦🇺 887 110 27ms 13 Jan 2023 275th Lydxn 🇨🇦 886 69 94ms 13 Dec 2022 275th sisyphus-ppcg 🇦🇺 886 69 96ms 16 Dec 2022 277th hrubymar10 886 133 272ms 27 Feb 2024 278th lifthrasiir 🇰🇷 885 29 5ms 29 Nov 2024 279th ehulinsky 🇺🇸 885 67 280ms 25 Sep 2021 279th fredrik-bakke 🇳🇴 885 67 311ms 2 Oct 2022 279th jakobkordez 🇸🇮 885 67 20ms 30 Oct 2022 279th Yewzir 🇧🇪 885 67 225ms 8 Oct 2023 279th dokutan 885 67 258ms 4 Feb 2025 284th edsrzf 🇳🇿 885 68 1,070ms 12 Sep 2025 285th Steffan153 🇫🇮 885 91 1,519ms 19 Aug 2024 286th lynn 885 96 1,269ms 6 Oct 2021 286th kg583 🇺🇸 885 96 42ms 26 Jul 2025 288th nwellnhof 🇩🇪 884 56 1,071ms 2 Mar 2023 289th KasperKivimaeki 🇫🇮 884 105 324ms 6 days ago 290th canissimia 🇦🇶 884 218 30ms 25 Oct 2021 291st Lydxn 🇨🇦 883 34 328ms 3 Mar 2023 291st 2bular 883 34 32ms 6 Nov 2025 293rd inventshah 883 67 10ms 26 Sep 2023 293rd ovs-code 🇩🇪 883 67 13ms 29 Jul 2024 295th Steffan153 🇫🇮 883 74 59ms 10 Nov 2023 295th sean-niemann 🇺🇸 883 74 57ms 9 Apr 2025 295th edsrzf 🇳🇿 883 74 64ms 5 Jul 2025 295th targrik 883 74 58ms 2 days ago 299th Steffan153 🇫🇮 883 75 145ms 19 Dec 2022 300th MeWhenI 🇻🇦 882 56 982ms 13 Nov 2022 301st Shanethegamer 🇺🇸 881 65 70ms 1 Dec 2024 302nd DialFrost 🇸🇬 881 78 8ms 17 Dec 2024 303rd Steffan153 🇫🇮 881 81 12ms 18 Apr 2023 303rd kg583 🇺🇸 881 81 12ms 15 Oct 2025 305th Steffan153 🇫🇮 881 82 2ms 29 Oct 2023 305th GrayJoKing 🇦🇺 881 82 4ms 19 Nov 2025 305th ovs-code 🇩🇪 881 82 2ms 19 Nov 2025 308th primo-ppcg 🇹🇭 881 99 42ms 19 Jul 2022 309th m-tkach 🇺🇦 881 127 24ms 15 Jan 2025 310th m-tkach 🇺🇦 880 143 25ms 7 Apr 2022 310th primo-ppcg 🇹🇭 880 143 25ms 25 Jun 2022 312th Shanethegamer 🇺🇸 879 97 89ms 17 Dec 2021 312th MeWhenI 🇻🇦 879 97 141ms 21 Jun 2022 312th stefangimmillaro 879 97 91ms 18 Oct 2022 312th sean-niemann 🇺🇸 879 97 89ms 7 Feb 2023 312th Steffan153 🇫🇮 879 97 88ms 9 Apr 2023 312th Yewzir 🇧🇪 879 97 89ms 14 Jan 2024 318th inventshah 878 61 3ms 26 Sep 2023 319th MeWhenI 🇻🇦 878 101 58ms 30 Jun 2022 320th Steffan153 🇫🇮 876 97 1,261ms 4 Jan 2023 First Prev 241–320 of 2,025 Next Last