The Calendar hole will go live in approximately 9 days. Why not try and solve it ahead of time?
Happy Numbers 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 554th TFeld00 🇩🇰 893 68 9ms 31 May 2019 554th marcin7Cd 893 68 9ms 27 Aug 2019 554th xorraxrax 893 68 9ms 19 Oct 2019 554th jiaminglimjm 🇲🇾 893 68 10ms 12 Dec 2019 554th SirBogman 🇺🇸 893 68 9ms 4 Jan 2020 554th thisishowmymindworks 🇳🇴 893 68 9ms 22 Jul 2020 554th ToriTheChicken 893 68 9ms 23 Jul 2020 554th ydevor 🇮🇱 893 68 9ms 26 Nov 2020 554th anter69 🇭🇺 893 68 9ms 14 Jan 2021 554th HETHAT 🇩🇿 893 68 9ms 31 Jan 2021 554th vezzick 893 68 9ms 7 Mar 2021 554th Indivicivet 893 68 10ms 26 Mar 2021 554th emplv 🇱🇻 893 68 9ms 31 Aug 2021 554th MichaelMBradley 🇨🇦 893 68 9ms 11 Jun 2022 554th janbehrens 🇩🇪 893 68 9ms 4 Jul 2022 554th betaveros 893 68 9ms 9 Aug 2022 554th 5quiwyrm 893 68 9ms 20 Aug 2022 554th PowerR0 893 68 9ms 25 Aug 2022 554th ItsMeNoobieboy 893 68 9ms 21 Dec 2022 554th scpchicken 🇵🇼 893 68 9ms 28 Jan 2023 554th CheeseCake628 🇳🇴 893 68 16ms 16 Feb 2023 554th Just4FunCoder 893 68 9ms 22 Mar 2023 554th fourth-bit 893 68 9ms 11 Jul 2023 554th RYNO8 893 68 9ms 22 Aug 2023 554th Yewzir 🇧🇪 893 68 9ms 6 Oct 2023 554th keelimeguy 🇺🇸 893 68 16ms 19 Oct 2023 554th 1231234md5 🇨🇳 893 68 9ms 13 Dec 2023 554th stackofbears 893 68 9ms 27 Dec 2023 554th CutSandstone 893 68 9ms 5 Jul 2024 554th Bulmenisaurus 893 68 10ms 17 Jul 2024 554th codingisgreatbutiamnot 893 68 15ms 12 Aug 2024 554th Troon 893 68 9ms 11 Feb 2025 554th plcc0 893 68 9ms 20 Feb 2025 554th albanian-laundromat 893 68 9ms 30 Jun 2025 554th SanderRuud 893 68 9ms 13 Jul 2025 554th qpwoeirut 893 68 9ms 1 Oct 2025 554th countlpaul-dotcom 893 68 9ms 19 Oct 2025 598th edsrzf 🇳🇿 893 90 57ms 9 hours ago 599th primo-ppcg 🇹🇭 893 91 119ms 14 Jan 2022 600th stackofbears 892 33 34ms 14 Mar 2025 600th 2bular 892 33 30ms 6 Nov 2025 602nd MeWhenI 🇻🇦 892 66 72ms 13 Dec 2022 603rd DialFrost 🇸🇬 892 68 4,182ms 25 Dec 2024 603rd GolfingSuccess 🇬🇷 892 68 4ms 11 Sep 2025 605th prplz 🇦🇺 892 80 2ms 20 Oct 2020 605th primo-ppcg 🇹🇭 892 80 1ms 21 Oct 2020 605th emgordon154 892 80 1ms 22 Dec 2021 605th GrayJoKing 🇦🇺 892 80 2ms 13 Mar 2022 605th jared-hughes 892 80 2ms 30 Mar 2022 605th janbehrens 🇩🇪 892 80 2ms 26 Nov 2023 605th Herbert00709 🇵🇱 892 80 2ms 8 Jun 2024 605th roupiq 🇵🇱 892 80 1ms 9 Jun 2024 613th MeWhenI 🇻🇦 892 92 24ms 13 Jul 2021 614th pardouin 🇫🇷 892 114 276ms 24 Aug 2024 614th DialFrost 🇸🇬 892 114 294ms 26 Dec 2024 614th snoozingnewt 🇨🇦 892 114 264ms 23 days ago 617th GrayJoKing 🇦🇺 891 72 36ms 14 Jun 2022 617th primo-ppcg 🇹🇭 891 72 37ms 21 Jun 2022 617th 386asm 🇺🇸 891 72 37ms 4 May 2023 620th MeWhenI 🇻🇦 890 56 877ms 13 Nov 2022 621st stefangimmillaro 890 71 4ms 9 Jan 2022 621st emplv 🇱🇻 890 71 5ms 21 Jul 2022 623rd GrayJoKing 🇦🇺 889 65 3ms 26 Jul 2023 624th Shanethegamer 🇺🇸 889 147 10ms 1 Aug 2023 624th MeWhenI 🇻🇦 889 147 9ms 1 Aug 2023 624th Lydxn 🇨🇦 889 147 10ms 1 Aug 2023 624th JayXon 🇺🇸 889 147 9ms 2 Aug 2023 624th Steffan153 🇫🇮 889 147 9ms 2 Aug 2023 624th janbehrens 🇩🇪 889 147 9ms 2 Aug 2023 624th GrayJoKing 🇦🇺 889 147 10ms 11 Aug 2023 624th BREMAUCY 🇫🇷 889 147 10ms 7 Sep 2023 624th dokutan 889 147 9ms 26 Oct 2023 624th Yewzir 🇧🇪 889 147 10ms 12 Mar 2024 624th HumanoidCPU 889 147 10ms 13 May 2024 624th pardouin 🇫🇷 889 147 9ms 20 Aug 2024 624th KatieLG 🇬🇧 889 147 10ms 26 Sep 2024 624th emgordon154 889 147 9ms 4 Dec 2024 624th CaedenHarper 🇨🇦 889 147 10ms 24 Jan 2025 624th rucin93 🇵🇱 889 147 10ms 23 Apr 2025 624th albanian-laundromat 889 147 10ms 20 Jul 2025 First Prev 561–640 of 3,141 Next Last
