The Calendar hole will go live in approximately 6 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 556th daedals 893 68 9ms 16 Apr 2019 556th villfa 893 68 9ms 20 May 2019 556th TFeld00 🇩🇰 893 68 9ms 31 May 2019 556th marcin7Cd 893 68 9ms 27 Aug 2019 556th xorraxrax 893 68 9ms 19 Oct 2019 556th jiaminglimjm 🇲🇾 893 68 10ms 12 Dec 2019 556th SirBogman 🇺🇸 893 68 9ms 4 Jan 2020 556th thisishowmymindworks 🇳🇴 893 68 9ms 22 Jul 2020 556th ToriTheChicken 893 68 9ms 23 Jul 2020 556th ydevor 🇮🇱 893 68 9ms 26 Nov 2020 556th anter69 🇭🇺 893 68 9ms 14 Jan 2021 556th HETHAT 🇩🇿 893 68 9ms 31 Jan 2021 556th vezzick 893 68 9ms 7 Mar 2021 556th Indivicivet 893 68 10ms 26 Mar 2021 556th emplv 🇱🇻 893 68 9ms 31 Aug 2021 556th MichaelMBradley 🇨🇦 893 68 9ms 11 Jun 2022 556th janbehrens 🇩🇪 893 68 9ms 4 Jul 2022 556th betaveros 893 68 9ms 9 Aug 2022 556th 5quiwyrm 893 68 9ms 20 Aug 2022 556th PowerR0 893 68 9ms 25 Aug 2022 556th ItsMeNoobieboy 893 68 9ms 21 Dec 2022 556th scpchicken 🇵🇼 893 68 9ms 28 Jan 2023 556th CheeseCake628 🇳🇴 893 68 16ms 16 Feb 2023 556th Just4FunCoder 893 68 9ms 22 Mar 2023 556th fourth-bit 893 68 9ms 11 Jul 2023 556th RYNO8 893 68 9ms 22 Aug 2023 556th Yewzir 🇧🇪 893 68 9ms 6 Oct 2023 556th keelimeguy 🇺🇸 893 68 16ms 19 Oct 2023 556th 1231234md5 🇨🇳 893 68 9ms 13 Dec 2023 556th stackofbears 893 68 9ms 27 Dec 2023 556th CutSandstone 893 68 9ms 5 Jul 2024 556th Bulmenisaurus 893 68 10ms 17 Jul 2024 556th codingisgreatbutiamnot 893 68 15ms 12 Aug 2024 556th Troon 893 68 9ms 11 Feb 2025 556th plcc0 893 68 9ms 20 Feb 2025 556th albanian-laundromat 893 68 9ms 30 Jun 2025 556th SanderRuud 893 68 9ms 13 Jul 2025 556th qpwoeirut 893 68 9ms 1 Oct 2025 556th countlpaul-dotcom 893 68 9ms 19 Oct 2025 600th edsrzf 🇳🇿 893 90 46ms 3 days ago 601st primo-ppcg 🇹🇭 893 91 119ms 14 Jan 2022 602nd stackofbears 892 33 34ms 14 Mar 2025 602nd 2bular 892 33 30ms 6 Nov 2025 604th MeWhenI 🇻🇦 892 66 72ms 13 Dec 2022 605th DialFrost 🇸🇬 892 68 3,081ms 25 Dec 2024 605th GolfingSuccess 🇬🇷 892 68 4ms 11 Sep 2025 607th prplz 🇦🇺 892 80 2ms 20 Oct 2020 607th primo-ppcg 🇹🇭 892 80 1ms 21 Oct 2020 607th emgordon154 892 80 1ms 22 Dec 2021 607th GrayJoKing 🇦🇺 892 80 2ms 13 Mar 2022 607th jared-hughes 892 80 2ms 30 Mar 2022 607th janbehrens 🇩🇪 892 80 2ms 26 Nov 2023 607th Herbert00709 🇵🇱 892 80 2ms 8 Jun 2024 607th roupiq 🇵🇱 892 80 1ms 9 Jun 2024 615th MeWhenI 🇻🇦 892 92 24ms 13 Jul 2021 616th pardouin 🇫🇷 892 114 276ms 24 Aug 2024 616th DialFrost 🇸🇬 892 114 294ms 26 Dec 2024 616th snoozingnewt 🇨🇦 892 114 264ms 26 days ago 619th GrayJoKing 🇦🇺 891 72 36ms 14 Jun 2022 619th primo-ppcg 🇹🇭 891 72 37ms 21 Jun 2022 619th 386asm 🇺🇸 891 72 37ms 4 May 2023 622nd MeWhenI 🇻🇦 890 56 877ms 13 Nov 2022 623rd stefangimmillaro 890 71 6ms 9 Jan 2022 623rd emplv 🇱🇻 890 71 6ms 21 Jul 2022 625th GrayJoKing 🇦🇺 889 65 3ms 26 Jul 2023 626th Shanethegamer 🇺🇸 889 147 10ms 1 Aug 2023 626th MeWhenI 🇻🇦 889 147 9ms 1 Aug 2023 626th Lydxn 🇨🇦 889 147 10ms 1 Aug 2023 626th JayXon 🇺🇸 889 147 9ms 2 Aug 2023 626th Steffan153 🇫🇮 889 147 9ms 2 Aug 2023 626th janbehrens 🇩🇪 889 147 9ms 2 Aug 2023 626th GrayJoKing 🇦🇺 889 147 10ms 11 Aug 2023 626th BREMAUCY 🇫🇷 889 147 10ms 7 Sep 2023 626th dokutan 889 147 9ms 26 Oct 2023 626th Yewzir 🇧🇪 889 147 10ms 12 Mar 2024 626th HumanoidCPU 889 147 10ms 13 May 2024 626th pardouin 🇫🇷 889 147 9ms 20 Aug 2024 626th KatieLG 🇬🇧 889 147 10ms 26 Sep 2024 626th emgordon154 889 147 9ms 4 Dec 2024 626th CaedenHarper 🇨🇦 889 147 10ms 24 Jan 2025 First Prev 561–640 of 3,140 Next Last
