The Calendar hole will go live in approximately 6 days. Why not try and solve it ahead of time?
Happy Numbers in Haskell 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 1st Bubbler-4 1,000 72 134ms 20 Feb 2019 1st primo-ppcg 🇹🇭 1,000 72 145ms 9 Oct 2020 1st HPWiz 🇳🇿 1,000 72 140ms 15 Apr 2021 1st lynn 1,000 72 131ms 15 Apr 2021 1st JayXon 🇺🇸 1,000 72 139ms 28 Jun 2021 1st xnor-gate 1,000 72 137ms 22 Dec 2021 1st ovs-code 🇩🇪 1,000 72 136ms 4 Jul 2022 1st btnlq 1,000 72 139ms 15 Oct 2023 1st tobeannouncd 1,000 72 137ms 11 Jan 2024 10th flawr 986 73 136ms 24 Feb 2019 10th GrayJoKing 🇦🇺 986 73 136ms 5 Dec 2020 10th Shanethegamer 🇺🇸 986 73 140ms 15 Jul 2021 10th yzhs 🇩🇪 986 73 140ms 24 Jul 2021 10th sean-niemann 🇺🇸 986 73 132ms 7 Sep 2021 10th MeWhenI 🇻🇦 986 73 144ms 15 Sep 2021 10th sisyphus-ppcg 🇦🇺 986 73 140ms 16 Mar 2022 10th Lydxn 🇨🇦 986 73 139ms 4 Jul 2022 10th DaCuteRaccoon 986 73 136ms 30 Nov 2022 10th DialFrost 🇸🇬 986 73 154ms 28 Jan 2023 10th Steffan153 🇫🇮 986 73 137ms 28 Jan 2023 10th scpchicken 🇵🇼 986 73 140ms 7 Mar 2023 10th pardouin 🇫🇷 986 73 177ms 21 Sep 2024 10th LostSyntax21 🇬🇧 986 73 152ms 8 Jan 2025 10th snoozingnewt 🇨🇦 986 73 148ms 20 days ago 10th edsrzf 🇳🇿 986 73 153ms 34 hours ago 26th bforte 973 74 131ms 9 Dec 2018 26th annaproxy 973 74 130ms 12 Jan 2022 26th rak1507 🇬🇧 973 74 140ms 23 Feb 2022 26th Natanaelel 🇸🇪 973 74 143ms 31 May 2025 30th prplz 🇦🇺 960 75 145ms 12 Oct 2021 30th YAJUE114514 960 75 139ms 30 Jul 2025 32nd marcin7Cd 935 77 136ms 11 Mar 2020 32nd fuzzylojik-golf 🇺🇸 935 77 143ms 15 Sep 2025 34th treeowl 911 79 135ms 27 Feb 2019 34th user189032 911 79 136ms 29 May 2019 34th cbrt-x 911 79 137ms 15 Sep 2023 37th RussellEmerine 900 80 138ms 30 Nov 2019 37th iczelia 🇩🇪 900 80 159ms 20 Oct 2025 39th Laar 889 81 137ms 1 Apr 2019 39th alomiF 889 81 136ms 5 Oct 2023 39th brimstonetrader 889 81 115ms 26 Jan 2024 42nd jared-hughes 878 82 116ms 11 Sep 2023 43rd guliyevemil1 🇦🇿 828 87 114ms 20 Apr 2020 43rd strout 828 87 140ms 15 Dec 2023 45th Irratix 🇳🇱 809 89 118ms 23 Sep 2021 46th boxjelly 791 91 140ms 22 Jan 2021 47th Johannesd3 750 96 119ms 1 Jul 2019 48th achimkrause 742 97 113ms 15 Dec 2019 49th olligobber 🇦🇺 727 99 140ms 20 May 2020 50th yanqui-uxo 720 100 134ms 4 Sep 2018 50th HolmDev 720 100 146ms 3 Sep 2025 52nd the-zammers 713 101 119ms 2 Dec 2024 53rd stifflerus 686 105 140ms 12 Sep 2018 53rd Informagier 686 105 139ms 16 Sep 2020 55th anastos 673 107 141ms 23 Jul 2018 56th drbalan 667 108 152ms 20 Jul 2020 57th HallMatthew314 661 109 115ms 14 Feb 2022 58th fruno-bulax 621 116 148ms 16 Feb 2019 59th jtaxen 610 118 128ms 24 Jun 2024 60th gbxdl 600 120 121ms 7 Jan 2021 61st schaeffm 585 123 142ms 8 Oct 2019 61st hjcafaroUC 585 123 135ms 9 Aug 2020 63rd darrell-roberts 558 129 137ms 28 Feb 2020 64th hymanimy 537 134 115ms 18 Aug 2021 65th mossprescott 529 136 118ms 10 Aug 2018 66th citsur 480 150 122ms 9 Jun 2019 66th Haksell 🇦🇶 480 150 108ms 1 Dec 2019 66th KatieLG 🇬🇧 480 150 115ms 23 Nov 2020 66th mokymok 🇺🇸 480 150 106ms 9 Nov 2021 66th retrohun 480 150 111ms 27 Dec 2022 66th KatieLG-Transpiler 🇬🇧 480 150 112ms 14 May 2023 66th HumanoidCPU 480 150 110ms 13 May 2024 66th Mabeloid 🇳🇴 480 150 109ms 20 Sep 2024 66th CaedenHarper 🇨🇦 480 150 113ms 25 Jan 2025 75th jiaminglimjm 🇲🇾 442 163 111ms 9 Jan 2021 76th zt14427 358 201 105ms 2 May 2023 77th dokutan 353 204 140ms 22 Jul 2025 1–77 of 77
