The Calendar hole will go live in approximately 8 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 321st Steffan153 🇫🇮 876 97 1,261ms 4 Jan 2023 322nd canissimia 🇦🇶 875 144 2,821ms 24 Feb 2023 323rd Bubbler-4 874 96 4ms 14 Jul 2023 323rd Lydxn 🇨🇦 874 96 4ms 15 Jul 2023 323rd GrayJoKing 🇦🇺 874 96 4ms 15 Jul 2023 323rd btnlq 874 96 3ms 15 Jul 2023 323rd ovs-code 🇩🇪 874 96 5ms 15 Jul 2023 323rd MeWhenI 🇻🇦 874 96 4ms 25 Jul 2023 329th Steffan153 🇫🇮 873 113 441ms 17 Feb 2024 330th Fishron 872 68 262ms 21 Oct 2021 330th TFeld00 🇩🇰 872 68 391ms 22 Apr 2022 330th andre-lameirinhas 🇵🇹 872 68 186ms 26 Jul 2022 330th jmerle 🇳🇱 872 68 308ms 16 Feb 2023 330th elgan65536 872 68 19ms 7 Mar 2024 330th SB-945 872 68 20ms 31 Mar 2024 330th keelimeguy 🇺🇸 872 68 236ms 17 May 2025 330th albanian-laundromat 872 68 24ms 17 Jun 2025 338th Lydxn 🇨🇦 872 100 41ms 19 Jul 2022 339th stefangimmillaro 872 114 122ms 19 Oct 2023 339th kumavale 872 114 128ms 11 Nov 2025 341st DialFrost 🇸🇬 871 75 2,270ms 26 Dec 2024 342nd Steffan153 🇫🇮 871 76 17ms 12 Feb 2023 343rd prplz 🇦🇺 870 68 10ms 27 Sep 2021 344th fuzzylojik-golf 🇺🇸 870 78 154ms 15 Sep 2025 345th MeWhenI 🇻🇦 870 79 2ms 21 Jun 2022 346th steffan-polygolf 870 98 79ms 19 Feb 2024 347th Steffan153 🇫🇮 869 87 13ms 24 May 2024 348th btnlq 868 57 953ms 27 Dec 2021 348th SirBogman 🇺🇸 868 57 978ms 8 Jan 2024 350th Bubbler-4 868 66 74ms 13 Sep 2023 351st pardouin 🇫🇷 868 81 3,254ms 7 Nov 2024 352nd GolfingSuccess 🇬🇷 868 111 106ms 25 days ago 353rd primo-ppcg 🇹🇭 868 215 11ms 13 Aug 2025 354th MeWhenI 🇻🇦 867 86 85ms 31 Dec 2024 355th jared-hughes 867 185 11ms 25 Mar 2023 356th sean-niemann 🇺🇸 866 109 77ms 9 Mar 2022 356th inventshah 866 109 80ms 24 Nov 2022 358th kg583 🇺🇸 866 114 23ms 9 May 2025 358th edsrzf 🇳🇿 866 114 12ms 28 mins ago 360th 0xjac 🇨🇭 866 136 272ms 17 Jun 2025 361st JayXon 🇺🇸 866 175 1,691ms 15 Sep 2025 362nd DialFrost 🇸🇬 865 159 462ms 28 Mar 2025 362nd GolfingSuccess 🇬🇷 865 159 765ms 17 days ago 364th Natanaelel 🇸🇪 864 115 131ms 23 Jul 2025 365th stefangimmillaro 863 92 99ms 18 Sep 2023 366th Steffan153 🇫🇮 863 113 29ms 26 Dec 2022 367th duckyluuk 🇳🇱 862 65 476ms 29 Aug 2024 367th KatieLG 🇬🇧 862 65 645ms 28 Oct 2024 367th lifthrasiir 🇰🇷 862 65 350ms 2 Dec 2024 370th MeWhenI 🇻🇦 862 88 356ms 16 Aug 2023 370th stefangimmillaro 862 88 360ms 18 Sep 2023 370th namelessiw 862 88 435ms 9 Jun 2024 373rd Steffan153 🇫🇮 861 71 212ms 13 Dec 2022 374th GrayJoKing 🇦🇺 861 103 44ms 12 Mar 2022 375th snoozingnewt 🇨🇦 860 70 736ms 16 Oct 2025 376th LostSyntax21 🇬🇧 860 76 81ms 8 Jan 2025 377th albanian-laundromat 860 77 169ms 13 Nov 2025 378th Lydxn 🇨🇦 860 84 2ms 10 Oct 2023 379th m-tkach 🇺🇦 859 80 2ms 15 May 2022 379th sean-niemann 🇺🇸 859 80 3ms 7 Jun 2022 379th inventshah 859 80 3ms 14 Feb 2023 379th Alex-x90 🇺🇸 859 80 3ms 21 Feb 2023 379th JohandeRuiter 🇳🇱 859 80 3ms 8 Sep 2024 384th lynn 858 35 315ms 19 Sep 2021 384th jared-hughes 858 35 36ms 30 Sep 2021 384th primo-ppcg 🇹🇭 858 35 41ms 24 Mar 2025 384th Natanaelel 🇸🇪 858 35 247ms 31 May 2025 384th fuzzylojik-golf 🇺🇸 858 35 34ms 9 Sep 2025 384th SirBogman 🇺🇸 858 35 39ms 23 Sep 2025 390th NewDefectus 🇮🇱 858 69 11ms 16 Dec 2021 390th Shanethegamer 🇺🇸 858 69 10ms 25 Apr 2023 392nd c0d3-4-F00d 🇩🇪 858 115 43ms 5 Jan 2022 392nd MeWhenI 🇻🇦 858 115 43ms 21 Jun 2022 392nd DialFrost 🇸🇬 858 115 44ms 28 Jan 2023 392nd snoozingnewt 🇨🇦 858 115 43ms 16 Oct 2025 392nd blaztoma 🇱🇹 858 115 44ms 23 Nov 2025 397th stefangimmillaro 857 82 3,551ms 6 Nov 2024 397th emgordon154 857 82 3,780ms 8 Nov 2024 397th DialFrost 🇸🇬 857 82 4,166ms 19 Nov 2024 400th DialFrost 🇸🇬 857 87 35ms 12 Dec 2024 First Prev 321–400 of 2,023 Next Last