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 230th sean-niemann 🇺🇸 934 53 236ms 6 Apr 2025 242nd Lydxn 🇨🇦 934 87 114ms 13 Jan 2022 242nd JayXon 🇺🇸 934 87 114ms 14 Jan 2022 242nd lynn 934 87 118ms 7 Jul 2024 242nd DialFrost 🇸🇬 934 87 120ms 4 Apr 2025 242nd acotis 934 87 113ms 15 Apr 2025 242nd emgordon154 934 87 118ms 18 Apr 2025 242nd ovs-code 🇩🇪 934 87 121ms 20 Apr 2025 242nd pardouin 🇫🇷 934 87 117ms 20 Apr 2025 242nd stefangimmillaro 934 87 118ms 18 May 2025 242nd sean-niemann 🇺🇸 934 87 123ms 6 Jun 2025 242nd kumavale 934 87 116ms 17 Aug 2025 253rd JayXon 🇺🇸 932 72 1ms 9 Jul 2021 253rd Lydxn 🇨🇦 932 72 1ms 9 Jul 2021 253rd sisyphus-ppcg 🇦🇺 932 72 1ms 16 Mar 2022 253rd GrayJoKing 🇦🇺 932 72 1ms 9 Apr 2022 253rd btnlq 932 72 1ms 28 Dec 2022 258th flawr 932 73 136ms 24 Feb 2019 258th GrayJoKing 🇦🇺 932 73 136ms 5 Dec 2020 258th Shanethegamer 🇺🇸 932 73 140ms 15 Jul 2021 258th yzhs 🇩🇪 932 73 140ms 24 Jul 2021 258th sean-niemann 🇺🇸 932 73 132ms 7 Sep 2021 258th MeWhenI 🇻🇦 932 73 144ms 15 Sep 2021 258th sisyphus-ppcg 🇦🇺 932 73 140ms 16 Mar 2022 258th Lydxn 🇨🇦 932 73 139ms 4 Jul 2022 258th DaCuteRaccoon 932 73 136ms 30 Nov 2022 258th DialFrost 🇸🇬 932 73 154ms 28 Jan 2023 258th Steffan153 🇫🇮 932 73 137ms 28 Jan 2023 258th scpchicken 🇵🇼 932 73 140ms 7 Mar 2023 258th pardouin 🇫🇷 932 73 177ms 21 Sep 2024 258th LostSyntax21 🇬🇧 932 73 152ms 8 Jan 2025 258th snoozingnewt 🇨🇦 932 73 148ms 20 days ago 258th edsrzf 🇳🇿 932 73 153ms 33 hours ago 274th lyphyser 931 51 51ms 26 Dec 2023 274th AdrienHache 🇫🇷 931 51 57ms 29 Aug 2024 276th HPWiz 🇳🇿 930 53 54ms 18 Mar 2022 277th sean-niemann 🇺🇸 930 60 2ms 29 Oct 2022 277th Lydxn 🇨🇦 930 60 2ms 30 Oct 2022 277th sisyphus-ppcg 🇦🇺 930 60 2ms 3 Nov 2022 277th primo-ppcg 🇹🇭 930 60 4ms 19 Nov 2022 277th clockworknazo 930 60 4ms 19 Nov 2022 277th Steffan153 🇫🇮 930 60 2ms 28 Jan 2023 277th xsot 🇸🇬 930 60 2ms 25 Jul 2023 277th DialFrost 🇸🇬 930 60 4ms 14 Sep 2023 277th fuzzylojik-golf 🇺🇸 930 60 4ms 15 Sep 2025 286th nwellnhof 🇩🇪 930 79 316ms 21 Nov 2021 287th JayXon 🇺🇸 929 72 219ms 18 Aug 2021 287th Lydxn 🇨🇦 929 72 81ms 18 Aug 2021 287th MeWhenI 🇻🇦 929 72 80ms 11 Mar 2022 287th stefangimmillaro 929 72 84ms 28 Jul 2022 287th Steffan153 🇫🇮 929 72 85ms 9 Aug 2024 287th sean-niemann 🇺🇸 929 72 84ms 23 Dec 2024 293rd JayXon 🇺🇸 929 93 53ms 2 Jan 2022 293rd Lydxn 🇨🇦 929 93 54ms 2 Jan 2022 293rd inventshah 929 93 55ms 22 Apr 2023 293rd xsot 🇸🇬 929 93 57ms 23 May 2024 297th MeWhenI 🇻🇦 928 54 3ms 12 Aug 2024 297th sisyphus-ppcg 🇦🇺 928 54 3ms 12 Aug 2024 297th Steffan153 🇫🇮 928 54 4ms 12 Aug 2024 297th btnlq 928 54 3ms 14 Aug 2024 297th DialFrost 🇸🇬 928 54 4ms 15 Aug 2024 297th ovs-code 🇩🇪 928 54 3ms 15 Aug 2024 297th Shanethegamer 🇺🇸 928 54 4ms 15 Aug 2024 297th GrayJoKing 🇦🇺 928 54 3ms 17 Aug 2024 297th emgordon154 928 54 3ms 19 Aug 2024 297th pardouin 🇫🇷 928 54 3ms 6 Sep 2024 297th sean-niemann 🇺🇸 928 54 3ms 13 Jan 2025 297th snoozingnewt 🇨🇦 928 54 4ms 24 days ago 309th Steffan153 🇫🇮 927 57 3ms 16 Apr 2023 309th Lydxn 🇨🇦 927 57 4ms 18 Apr 2023 309th primo-ppcg 🇹🇭 927 57 4ms 27 Apr 2023 309th GrayJoKing 🇦🇺 927 57 4ms 20 Aug 2023 309th btnlq 927 57 4ms 22 Oct 2023 309th emgordon154 927 57 4ms 10 Jan 2025 309th sean-niemann 🇺🇸 927 57 3ms 21 Apr 2025 309th kg583 🇺🇸 927 57 3ms 26 Sep 2025 309th edsrzf 🇳🇿 927 57 4ms 26 Sep 2025 318th lynn 927 64 13ms 15 Nov 2021 318th MeWhenI 🇻🇦 927 64 12ms 15 Nov 2021 318th Lydxn 🇨🇦 927 64 13ms 16 Nov 2021 First Prev 241–320 of 3,140 Next Last