The Calendar hole will go live in approximately 6 days. Why not try and solve it ahead of time?
Happy Numbers in Haskell 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 1st Lydxn 🇨🇦 1,000 61 109ms 4 Jul 2022 2nd primo-ppcg 🇹🇭 924 66 111ms 6 May 2019 2nd HPWiz 🇳🇿 924 66 105ms 7 May 2019 2nd lynn 924 66 113ms 15 Jul 2021 2nd JayXon 🇺🇸 924 66 114ms 4 Jul 2022 2nd Steffan153 🇫🇮 924 66 110ms 28 Jan 2023 2nd btnlq 924 66 106ms 15 Oct 2023 2nd sean-niemann 🇺🇸 924 66 119ms 9 Jan 2025 9th ovs-code 🇩🇪 910 67 109ms 4 Jul 2022 9th edsrzf 🇳🇿 910 67 140ms 26 hours ago 11th the-zammers 884 69 119ms 2 Dec 2024 12th Bubbler-4 847 72 134ms 20 Feb 2019 12th xnor-gate 847 72 137ms 22 Dec 2021 12th tobeannouncd 847 72 137ms 11 Jan 2024 15th flawr 836 73 136ms 24 Feb 2019 15th GrayJoKing 🇦🇺 836 73 136ms 5 Dec 2020 15th Shanethegamer 🇺🇸 836 73 140ms 15 Jul 2021 15th yzhs 🇩🇪 836 73 140ms 24 Jul 2021 15th MeWhenI 🇻🇦 836 73 144ms 15 Sep 2021 15th sisyphus-ppcg 🇦🇺 836 73 140ms 16 Mar 2022 15th DaCuteRaccoon 836 73 136ms 30 Nov 2022 15th DialFrost 🇸🇬 836 73 154ms 28 Jan 2023 15th scpchicken 🇵🇼 836 73 140ms 7 Mar 2023 15th pardouin 🇫🇷 836 73 177ms 21 Sep 2024 15th LostSyntax21 🇬🇧 836 73 152ms 8 Jan 2025 15th snoozingnewt 🇨🇦 836 73 148ms 20 days ago 27th bforte 824 74 131ms 9 Dec 2018 27th annaproxy 824 74 130ms 12 Jan 2022 27th rak1507 🇬🇧 824 74 140ms 23 Feb 2022 27th Natanaelel 🇸🇪 824 74 143ms 31 May 2025 31st prplz 🇦🇺 813 75 145ms 12 Oct 2021 31st YAJUE114514 813 75 139ms 30 Jul 2025 33rd marcin7Cd 792 77 136ms 11 Mar 2020 33rd fuzzylojik-golf 🇺🇸 792 77 143ms 15 Sep 2025 35th treeowl 772 79 135ms 27 Feb 2019 35th user189032 772 79 136ms 29 May 2019 35th cbrt-x 772 79 137ms 15 Sep 2023 38th RussellEmerine 763 80 138ms 30 Nov 2019 38th iczelia 🇩🇪 763 80 159ms 20 Oct 2025 40th Laar 753 81 137ms 1 Apr 2019 40th alomiF 753 81 136ms 5 Oct 2023 40th brimstonetrader 753 81 115ms 26 Jan 2024 43rd jared-hughes 744 82 116ms 11 Sep 2023 44th guliyevemil1 🇦🇿 701 87 114ms 20 Apr 2020 44th strout 701 87 140ms 15 Dec 2023 46th Irratix 🇳🇱 685 89 118ms 23 Sep 2021 47th boxjelly 670 91 140ms 22 Jan 2021 48th Johannesd3 635 96 119ms 1 Jul 2019 49th achimkrause 629 97 113ms 15 Dec 2019 50th olligobber 🇦🇺 616 99 140ms 20 May 2020 51st yanqui-uxo 610 100 134ms 4 Sep 2018 51st HolmDev 610 100 146ms 3 Sep 2025 53rd stifflerus 581 105 140ms 12 Sep 2018 53rd Informagier 581 105 139ms 16 Sep 2020 55th anastos 570 107 141ms 23 Jul 2018 56th drbalan 565 108 152ms 20 Jul 2020 57th HallMatthew314 560 109 115ms 14 Feb 2022 58th fruno-bulax 526 116 148ms 16 Feb 2019 59th jtaxen 517 118 128ms 24 Jun 2024 60th gbxdl 508 120 121ms 7 Jan 2021 61st schaeffm 496 123 142ms 8 Oct 2019 61st hjcafaroUC 496 123 135ms 9 Aug 2020 63rd darrell-roberts 473 129 137ms 28 Feb 2020 64th hymanimy 455 134 115ms 18 Aug 2021 65th mossprescott 449 136 118ms 10 Aug 2018 66th citsur 407 150 122ms 9 Jun 2019 66th Haksell 🇦🇶 407 150 108ms 1 Dec 2019 66th KatieLG 🇬🇧 407 150 115ms 23 Nov 2020 66th mokymok 🇺🇸 407 150 106ms 9 Nov 2021 66th retrohun 407 150 111ms 27 Dec 2022 66th KatieLG-Transpiler 🇬🇧 407 150 112ms 14 May 2023 66th HumanoidCPU 407 150 110ms 13 May 2024 66th Mabeloid 🇳🇴 407 150 109ms 20 Sep 2024 66th CaedenHarper 🇨🇦 407 150 113ms 25 Jan 2025 75th jiaminglimjm 🇲🇾 374 163 111ms 9 Jan 2021 76th zt14427 303 201 105ms 2 May 2023 77th dokutan 299 204 140ms 22 Jul 2025 1–77 of 77
