The Calendar hole will go live in approximately 7 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 555th villfa 893 68 9ms 20 May 2019 555th TFeld00 🇩🇰 893 68 9ms 31 May 2019 555th marcin7Cd 893 68 9ms 27 Aug 2019 555th xorraxrax 893 68 9ms 19 Oct 2019 555th jiaminglimjm 🇲🇾 893 68 10ms 12 Dec 2019 555th SirBogman 🇺🇸 893 68 9ms 4 Jan 2020 555th thisishowmymindworks 🇳🇴 893 68 9ms 22 Jul 2020 555th ToriTheChicken 893 68 9ms 23 Jul 2020 555th ydevor 🇮🇱 893 68 9ms 26 Nov 2020 555th anter69 🇭🇺 893 68 9ms 14 Jan 2021 555th HETHAT 🇩🇿 893 68 9ms 31 Jan 2021 555th vezzick 893 68 9ms 7 Mar 2021 555th Indivicivet 893 68 10ms 26 Mar 2021 555th emplv 🇱🇻 893 68 9ms 31 Aug 2021 555th MichaelMBradley 🇨🇦 893 68 9ms 11 Jun 2022 555th janbehrens 🇩🇪 893 68 9ms 4 Jul 2022 555th betaveros 893 68 9ms 9 Aug 2022 555th 5quiwyrm 893 68 9ms 20 Aug 2022 555th PowerR0 893 68 9ms 25 Aug 2022 555th ItsMeNoobieboy 893 68 9ms 21 Dec 2022 555th scpchicken 🇵🇼 893 68 9ms 28 Jan 2023 555th CheeseCake628 🇳🇴 893 68 16ms 16 Feb 2023 555th Just4FunCoder 893 68 9ms 22 Mar 2023 555th fourth-bit 893 68 9ms 11 Jul 2023 555th RYNO8 893 68 9ms 22 Aug 2023 555th Yewzir 🇧🇪 893 68 9ms 6 Oct 2023 555th keelimeguy 🇺🇸 893 68 16ms 19 Oct 2023 555th 1231234md5 🇨🇳 893 68 9ms 13 Dec 2023 555th stackofbears 893 68 9ms 27 Dec 2023 555th CutSandstone 893 68 9ms 5 Jul 2024 555th Bulmenisaurus 893 68 10ms 17 Jul 2024 555th codingisgreatbutiamnot 893 68 15ms 12 Aug 2024 555th Troon 893 68 9ms 11 Feb 2025 555th plcc0 893 68 9ms 20 Feb 2025 555th albanian-laundromat 893 68 9ms 30 Jun 2025 555th SanderRuud 893 68 9ms 13 Jul 2025 555th qpwoeirut 893 68 9ms 1 Oct 2025 555th countlpaul-dotcom 893 68 9ms 19 Oct 2025 599th edsrzf 🇳🇿 893 90 46ms 2 days ago 600th primo-ppcg 🇹🇭 893 91 119ms 14 Jan 2022 601st stackofbears 892 33 34ms 14 Mar 2025 601st 2bular 892 33 30ms 6 Nov 2025 603rd MeWhenI 🇻🇦 892 66 72ms 13 Dec 2022 604th DialFrost 🇸🇬 892 68 3,081ms 25 Dec 2024 604th GolfingSuccess 🇬🇷 892 68 4ms 11 Sep 2025 606th prplz 🇦🇺 892 80 2ms 20 Oct 2020 606th primo-ppcg 🇹🇭 892 80 1ms 21 Oct 2020 606th emgordon154 892 80 1ms 22 Dec 2021 606th GrayJoKing 🇦🇺 892 80 2ms 13 Mar 2022 606th jared-hughes 892 80 2ms 30 Mar 2022 606th janbehrens 🇩🇪 892 80 2ms 26 Nov 2023 606th Herbert00709 🇵🇱 892 80 2ms 8 Jun 2024 606th roupiq 🇵🇱 892 80 1ms 9 Jun 2024 614th MeWhenI 🇻🇦 892 92 24ms 13 Jul 2021 615th pardouin 🇫🇷 892 114 276ms 24 Aug 2024 615th DialFrost 🇸🇬 892 114 294ms 26 Dec 2024 615th snoozingnewt 🇨🇦 892 114 264ms 25 days ago 618th GrayJoKing 🇦🇺 891 72 36ms 14 Jun 2022 618th primo-ppcg 🇹🇭 891 72 37ms 21 Jun 2022 618th 386asm 🇺🇸 891 72 37ms 4 May 2023 621st MeWhenI 🇻🇦 890 56 877ms 13 Nov 2022 622nd stefangimmillaro 890 71 6ms 9 Jan 2022 622nd emplv 🇱🇻 890 71 6ms 21 Jul 2022 624th GrayJoKing 🇦🇺 889 65 3ms 26 Jul 2023 625th Shanethegamer 🇺🇸 889 147 10ms 1 Aug 2023 625th MeWhenI 🇻🇦 889 147 9ms 1 Aug 2023 625th Lydxn 🇨🇦 889 147 10ms 1 Aug 2023 625th JayXon 🇺🇸 889 147 9ms 2 Aug 2023 625th Steffan153 🇫🇮 889 147 9ms 2 Aug 2023 625th janbehrens 🇩🇪 889 147 9ms 2 Aug 2023 625th GrayJoKing 🇦🇺 889 147 10ms 11 Aug 2023 625th BREMAUCY 🇫🇷 889 147 10ms 7 Sep 2023 625th dokutan 889 147 9ms 26 Oct 2023 625th Yewzir 🇧🇪 889 147 10ms 12 Mar 2024 625th HumanoidCPU 889 147 10ms 13 May 2024 625th pardouin 🇫🇷 889 147 9ms 20 Aug 2024 625th KatieLG 🇬🇧 889 147 10ms 26 Sep 2024 625th emgordon154 889 147 9ms 4 Dec 2024 625th CaedenHarper 🇨🇦 889 147 10ms 24 Jan 2025 625th rucin93 🇵🇱 889 147 10ms 23 Apr 2025 First Prev 561–640 of 3,139 Next Last
