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 625th albanian-laundromat 889 147 10ms 20 Jul 2025 625th Babafaba 889 147 10ms 24 Oct 2025 625th GolfingSuccess 🇬🇷 889 147 10ms 8 Nov 2025 625th snoozingnewt 🇨🇦 889 147 10ms 19 days ago 645th ovs-code 🇩🇪 887 87 462ms 29 Jul 2024 646th MeWhenI 🇻🇦 886 76 37ms 16 May 2023 647th MeWhenI 🇻🇦 885 52 66ms 2 Nov 2023 647th Yewzir 🇧🇪 885 52 67ms 7 Mar 2024 647th edsrzf 🇳🇿 885 52 63ms 17 Jan 2025 647th fuzzylojik-golf 🇺🇸 885 52 60ms 17 Sep 2025 651st Shanethegamer 🇺🇸 885 83 305ms 12 May 2023 651st janbehrens 🇩🇪 885 83 316ms 26 Nov 2023 651st Yewzir 🇧🇪 885 83 338ms 11 Feb 2024 651st snoozingnewt 🇨🇦 885 83 332ms 25 days ago 655th lynn 885 93 27ms 12 Jul 2023 656th KasperKivimaeki 🇫🇮 885 115 263ms 2 Oct 2025 657th Steffan153 🇫🇮 884 78 1ms 29 Oct 2023 658th MeWhenI 🇻🇦 883 75 2ms 12 Sep 2022 658th sean-niemann 🇺🇸 883 75 2ms 8 Oct 2024 660th jared-hughes 883 76 1ms 6 Mar 2022 660th Steffan153 🇫🇮 883 76 1ms 25 Feb 2023 662nd marcin7Cd 883 77 136ms 11 Mar 2020 662nd fuzzylojik-golf 🇺🇸 883 77 143ms 15 Sep 2025 664th marcin7Cd 883 148 10ms 12 Oct 2020 664th Attero 🇸🇪 883 148 9ms 12 Oct 2020 664th sisyphus-ppcg 🇦🇺 883 148 10ms 30 May 2021 664th lynn 883 148 10ms 1 Jun 2021 664th SirBogman 🇺🇸 883 148 10ms 28 Nov 2021 664th ovs-code 🇩🇪 883 148 10ms 22 Apr 2022 664th scpchicken 🇵🇼 883 148 10ms 4 Feb 2023 671st pardouin 🇫🇷 882 63 668ms 29 Aug 2025 672nd prplz 🇦🇺 882 68 9ms 12 Oct 2021 672nd NewDefectus 🇮🇱 882 68 9ms 16 Dec 2021 674th emplv 🇱🇻 882 93 25ms 29 Jun 2022 675th Attero 🇸🇪 881 81 2ms 4 May 2020 675th c0d3-4-F00d 🇩🇪 881 81 2ms 5 Jan 2022 675th snoozingnewt 🇨🇦 881 81 2ms 13 Sep 2025 675th AZTECCO 881 81 2ms 16 Sep 2025 675th Yax42 🇫🇷 881 81 2ms 14 Oct 2025 680th m-tkach 🇺🇦 881 98 59ms 9 Mar 2023 680th annaproxy 881 98 57ms 22 Oct 2023 680th Yewzir 🇧🇪 881 98 61ms 30 Dec 2023 683rd benwilliamgraham 880 69 9ms 26 Jan 2019 683rd OllieBoyne 🇬🇧 880 69 9ms 16 Jan 2021 683rd eiburns 880 69 9ms 20 Jan 2022 683rd vishwathg 880 69 9ms 16 Aug 2022 683rd emirps 880 69 9ms 22 Feb 2023 683rd Vaekor 880 69 9ms 9 Jul 2023 683rd AVDestroyer 880 69 9ms 4 Sep 2023 683rd m42km 880 69 9ms 7 Oct 2023 683rd elgan65536 880 69 9ms 4 Apr 2024 692nd Yewzir 🇧🇪 880 79 97ms 6 Dec 2023 693rd JayXon 🇺🇸 880 143 1,685ms 15 Sep 2025 694th primo-ppcg 🇹🇭 878 50 31ms 11 Oct 2020 694th o0lit3 🇺🇸 878 50 10ms 19 Apr 2021 694th armin-k1 878 50 8ms 8 Sep 2021 694th nwellnhof 🇩🇪 878 50 14ms 26 Dec 2021 694th Lydxn 🇨🇦 878 50 32ms 25 May 2022 694th saito-ta 🇯🇵 878 50 17ms 27 May 2022 700th snoozingnewt 🇨🇦 878 95 356ms 25 days ago 701st sean-niemann 🇺🇸 877 88 384ms 6 Aug 2024 702nd primo-ppcg 🇹🇭 877 116 275ms 21 Apr 2020 702nd kkoenig 877 116 259ms 5 Jan 2024 704th KatieLG-Transpiler 🇬🇧 877 149 10ms 24 Jun 2022 705th primo-ppcg 🇹🇭 875 53 284ms 19 Oct 2020 705th MeWhenI 🇻🇦 875 53 280ms 15 Feb 2023 707th alo-gin 874 54 33ms 19 Oct 2018 707th hrrs01 874 54 119ms 14 Apr 2020 707th jared-hughes 874 54 34ms 9 Sep 2022 707th ovs-code 🇩🇪 874 54 44ms 9 May 2023 711th hemphen 874 84 339ms 28 Aug 2022 712th DialFrost 🇸🇬 874 148 501ms 12 Jan 2025 712th emgordon154 874 148 479ms 12 Jan 2025 712th Shanethegamer 🇺🇸 874 148 482ms 13 Jan 2025 712th KatieLG 🇬🇧 874 148 481ms 13 Jan 2025 712th HumanoidCPU 874 148 463ms 13 Jan 2025 712th dokutan 874 148 452ms 13 Jan 2025 712th GolfingSuccess 🇬🇷 874 148 483ms 18 Jan 2025 712th ovs-code 🇩🇪 874 148 475ms 24 Jan 2025 712th CaedenHarper 🇨🇦 874 148 454ms 25 Jan 2025 First Prev 641–720 of 3,140 Next Last
