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 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 390th CornerMercury 🇬🇧 874 80 222ms 6 Oct 2025 402nd Steffan153 🇫🇮 874 91 150ms 17 Dec 2022 403rd steffan-polygolf 874 98 79ms 19 Feb 2024 404th stefangimmillaro 874 114 122ms 19 Oct 2023 404th kumavale 874 114 128ms 11 Nov 2025 406th prplz 🇦🇺 873 68 10ms 27 Sep 2021 407th fuzzylojik-golf 🇺🇸 873 78 154ms 15 Sep 2025 408th pardouin 🇫🇷 873 81 4,090ms 7 Nov 2024 409th MeWhenI 🇻🇦 872 86 85ms 31 Dec 2024 410th GolfingSuccess 🇬🇷 872 112 106ms 25 days ago 411th Steffan153 🇫🇮 870 43 250ms 17 Dec 2022 411th ovs-code 🇩🇪 870 43 273ms 31 Dec 2023 413th prplz 🇦🇺 870 55 38ms 18 Dec 2021 413th lynn 870 55 84ms 25 May 2022 413th ovs-code 🇩🇪 870 55 66ms 9 May 2023 413th Natanaelel 🇸🇪 870 55 38ms 10 May 2023 413th MeWhenI 🇻🇦 870 55 70ms 16 Aug 2023 418th neel11235813 870 77 438ms 15 Jan 2024 418th CaedenHarper 🇨🇦 870 77 571ms 14 Jul 2025 420th sean-niemann 🇺🇸 870 92 91ms 8 Oct 2024 421st jared-hughes 870 185 11ms 25 Mar 2023 422nd primo-ppcg 🇹🇭 870 215 11ms 13 Aug 2025 423rd sean-niemann 🇺🇸 869 109 77ms 9 Mar 2022 423rd inventshah 869 109 80ms 24 Nov 2022 425th kg583 🇺🇸 869 114 23ms 9 May 2025 426th 0xjac 🇨🇭 869 137 272ms 17 Jun 2025 427th lynn 868 35 315ms 19 Sep 2021 427th jared-hughes 868 35 36ms 30 Sep 2021 427th primo-ppcg 🇹🇭 868 35 41ms 24 Mar 2025 427th Natanaelel 🇸🇪 868 35 247ms 31 May 2025 427th fuzzylojik-golf 🇺🇸 868 35 34ms 9 Sep 2025 427th SirBogman 🇺🇸 868 35 39ms 23 Sep 2025 433rd stefangimmillaro 868 92 99ms 18 Sep 2023 434th DialFrost 🇸🇬 868 159 462ms 28 Mar 2025 434th GolfingSuccess 🇬🇷 868 159 765ms 17 days ago 436th JayXon 🇺🇸 868 176 1,691ms 15 Sep 2025 437th emgordon154 867 31 503ms 10 Sep 2025 438th Steffan153 🇫🇮 867 113 29ms 26 Dec 2022 439th Natanaelel 🇸🇪 867 115 131ms 23 Jul 2025 440th CaedenHarper 🇨🇦 866 71 824ms 11 Sep 2025 441st DialFrost 🇸🇬 866 89 378ms 16 Nov 2025 442nd Lydxn 🇨🇦 865 84 2ms 10 Oct 2023 443rd GrayJoKing 🇦🇺 865 94 143ms 23 Oct 2023 444th LostSyntax21 🇬🇧 864 76 81ms 8 Jan 2025 445th jared-hughes 864 81 283ms 19 Sep 2021 445th jacklynnepenick 864 81 198ms 5 Nov 2021 445th ehulinsky 🇺🇸 864 81 284ms 10 Nov 2021 445th ZakkkkAttackkkk 🇵🇭 864 81 122ms 21 Dec 2021 445th guilhem-roy 🇫🇷 864 81 304ms 26 Feb 2022 445th suwat513 864 81 301ms 15 Sep 2022 445th LogicalJoe 864 81 216ms 7 Oct 2022 445th Eilonlif 🇮🇱 864 81 310ms 3 Nov 2022 445th btjones0 864 81 292ms 18 Nov 2022 445th adamnielson42 🇺🇸 864 81 268ms 10 Apr 2023 445th janbehrens 🇩🇪 864 81 212ms 17 Jun 2023 445th snoozingnewt 🇨🇦 864 81 309ms 3 Oct 2023 445th DialFrost 🇸🇬 864 81 209ms 18 Dec 2023 445th plcc0 864 81 208ms 20 Apr 2025 445th edsrzf 🇳🇿 864 81 218ms 22 Jul 2025 445th Babafaba 864 81 301ms 6 Nov 2025 461st m-tkach 🇺🇦 863 81 3ms 6 Oct 2021 461st sean-niemann 🇺🇸 863 81 3ms 5 Jan 2022 461st Steffan153 🇫🇮 863 81 3ms 12 Jan 2023 461st inventshah 863 81 3ms 14 Feb 2023 461st Alex-x90 🇺🇸 863 81 3ms 14 Feb 2023 461st JohandeRuiter 🇳🇱 863 81 4ms 8 Sep 2024 467th stefangimmillaro 862 82 3,551ms 6 Nov 2024 467th emgordon154 862 82 3,780ms 8 Nov 2024 467th DialFrost 🇸🇬 862 82 4,166ms 19 Nov 2024 470th DialFrost 🇸🇬 862 87 35ms 12 Dec 2024 471st c0d3-4-F00d 🇩🇪 862 115 43ms 5 Jan 2022 471st MeWhenI 🇻🇦 862 115 43ms 21 Jun 2022 471st DialFrost 🇸🇬 862 115 44ms 28 Jan 2023 471st edsrzf 🇳🇿 862 115 44ms 5 Nov 2024 471st snoozingnewt 🇨🇦 862 115 43ms 16 Oct 2025 471st blaztoma 🇱🇹 862 115 44ms 23 Nov 2025 477th NewDefectus 🇮🇱 861 69 11ms 16 Dec 2021 477th Shanethegamer 🇺🇸 861 69 10ms 25 Apr 2023 479th ovs-code 🇩🇪 861 96 422ms 29 Jul 2024 480th Shanethegamer 🇺🇸 860 93 129ms 20 Sep 2021 First Prev 401–480 of 2,038 Next Last