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 chars. 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 Chars Time Submitted 476th Yewzir 🇧🇪 816 42 67ms 7 Mar 2024 476th pardouin 🇫🇷 816 42 63ms 24 Aug 2024 476th edsrzf 🇳🇿 816 42 63ms 17 Jan 2025 476th sean-niemann 🇺🇸 816 42 67ms 7 Apr 2025 476th DialFrost 🇸🇬 816 42 61ms 7 Apr 2025 476th fuzzylojik-golf 🇺🇸 816 42 60ms 17 Sep 2025 487th AlephSquirrel 815 27 3ms 3 Nov 2025 488th Constructor7 812 58 9ms 24 Feb 2018 488th GolfingSuccess 🇬🇷 812 58 9ms 26 Mar 2018 488th xnor-gate 812 58 15ms 12 Apr 2018 488th kmaork 🇮🇱 812 58 9ms 18 Apr 2018 488th edre 812 58 9ms 30 Apr 2018 488th j55d 812 58 9ms 19 Sep 2018 488th daedals 812 58 9ms 16 Apr 2019 488th villfa 812 58 9ms 20 May 2019 488th TFeld00 🇩🇰 812 58 9ms 31 May 2019 488th marcin7Cd 812 58 9ms 27 Aug 2019 488th jiaminglimjm 🇲🇾 812 58 10ms 12 Dec 2019 488th SirBogman 🇺🇸 812 58 9ms 4 Jan 2020 488th thisishowmymindworks 🇳🇴 812 58 9ms 22 Jul 2020 488th ToriTheChicken 812 58 9ms 23 Jul 2020 488th anter69 🇭🇺 812 58 9ms 14 Jan 2021 488th lynn 812 58 9ms 2 Mar 2021 488th vezzick 812 58 9ms 7 Mar 2021 488th Indivicivet 812 58 10ms 26 Mar 2021 488th Larspolo 812 58 9ms 20 Jun 2021 488th emplv 🇱🇻 812 58 9ms 31 Aug 2021 488th jared-hughes 812 58 15ms 19 Sep 2021 488th ovs-code 🇩🇪 812 58 9ms 1 Feb 2022 488th MichaelMBradley 🇨🇦 812 58 9ms 11 Jun 2022 488th bricknellj 812 58 9ms 29 Jun 2022 488th janbehrens 🇩🇪 812 58 9ms 4 Jul 2022 488th betaveros 812 58 9ms 9 Aug 2022 488th 5quiwyrm 812 58 9ms 20 Aug 2022 488th ItsMeNoobieboy 812 58 9ms 21 Dec 2022 488th AlephSquirrel 812 58 9ms 28 Jan 2023 488th scpchicken 🇵🇼 812 58 9ms 28 Jan 2023 488th CheeseCake628 🇳🇴 812 58 16ms 16 Feb 2023 488th Just4FunCoder 812 58 9ms 22 Mar 2023 488th fourth-bit 812 58 9ms 11 Jul 2023 488th RYNO8 812 58 9ms 22 Aug 2023 488th Rubiksmath 812 58 9ms 25 Aug 2023 488th Yewzir 🇧🇪 812 58 9ms 6 Oct 2023 488th keelimeguy 🇺🇸 812 58 16ms 19 Oct 2023 488th 1231234md5 🇨🇳 812 58 9ms 13 Dec 2023 488th stackofbears 812 58 9ms 27 Dec 2023 488th CutSandstone 812 58 9ms 5 Jul 2024 488th Bulmenisaurus 812 58 10ms 17 Jul 2024 488th CaedenHarper 🇨🇦 812 58 9ms 6 Aug 2024 488th codingisgreatbutiamnot 812 58 15ms 12 Aug 2024 488th plcc0 812 58 9ms 20 Feb 2025 488th albanian-laundromat 812 58 9ms 30 Jun 2025 488th SanderRuud 812 58 9ms 13 Jul 2025 488th edsrzf 🇳🇿 812 58 9ms 15 Sep 2025 488th qpwoeirut 812 58 9ms 1 Oct 2025 488th blaztoma 🇱🇹 812 58 9ms 16 Nov 2025 488th Emutis 🇱🇹 812 58 9ms 16 Nov 2025 488th ryyyn 🇺🇸 812 58 9ms 21 days ago 539th emplv 🇱🇻 811 67 99ms 14 Mar 2023 540th somebody1234 807 85 5ms 20 Nov 2018 540th dokutan 807 85 5ms 15 Jan 2024 540th Yewzir 🇧🇪 807 85 4ms 6 Feb 2024 543rd ovs-code 🇩🇪 805 77 462ms 29 Jul 2024 544th sisyphus-ppcg 🇦🇺 805 91 1ms 18 May 2022 544th ovs-code 🇩🇪 805 91 1ms 20 May 2022 544th inventshah 805 91 1ms 4 Jun 2022 544th nwellnhof 🇩🇪 805 91 1ms 8 Jul 2022 544th retrohun 805 91 1ms 30 Apr 2023 544th kritixilithos 805 91 1ms 22 May 2024 550th lynn 804 34 38ms 13 Apr 2021 550th jared-hughes 804 34 33ms 30 Sep 2021 550th Natanaelel 🇸🇪 804 34 41ms 28 Nov 2023 550th SirBogman 🇺🇸 804 34 33ms 8 Jul 2025 550th fuzzylojik-golf 🇺🇸 804 34 34ms 9 Sep 2025 555th primo-ppcg 🇹🇭 802 61 79ms 9 Feb 2022 556th Bubbler-4 801 72 134ms 20 Feb 2019 556th xnor-gate 801 72 137ms 22 Dec 2021 556th tobeannouncd 801 72 137ms 11 Jan 2024 559th pardouin 🇫🇷 801 106 285ms 24 Aug 2024 560th DialFrost 🇸🇬 800 62 60ms 21 Jan 2025 First Prev 481–560 of 3,124 Next Last
