The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Happy Numbers (Long) 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 801st Schmitt-Very-Cool 725 128 425ms 30 Sep 2025 802nd scpchicken 🇵🇼 725 137 152ms 19 May 2022 803rd albanian-laundromat 724 190 484ms 18 Oct 2025 804th Shanethegamer 🇺🇸 723 57 105ms 27 Sep 2021 805th stefangimmillaro 723 82 307ms 27 Sep 2021 805th NewDefectus 🇮🇱 723 82 19ms 16 Dec 2021 805th CedricGebistorf 723 82 220ms 25 Feb 2022 805th aksyristos 723 82 195ms 12 Feb 2023 805th quimey 723 82 205ms 22 Mar 2023 805th StefanHabel 🇨🇦 723 82 302ms 26 Mar 2023 805th Fracture17 723 82 271ms 8 Apr 2023 805th Re-Adventures 🇮🇳 723 82 222ms 20 Jul 2023 805th Natanaelel 🇸🇪 723 82 213ms 29 Oct 2023 805th codingisgreatbutiamnot 723 82 292ms 25 Jul 2024 805th klixel 🇨🇦 723 82 292ms 17 Jan 2025 805th blaztoma 🇱🇹 723 82 250ms 15 Nov 2025 805th CommandLeo 🇮🇹 723 82 298ms 14 days ago 805th luuumine 🇫🇷 723 82 303ms 14 days ago 805th FortuiteMan 🇫🇷 723 82 290ms 13 days ago 820th AlephSquirrel 723 95 2ms 8 Jun 2023 821st randolchance 722 82 11ms 11 Jan 2023 822nd arctouch-cristiannevianna 722 105 386ms 26 May 2023 822nd annaproxy 722 105 396ms 11 Apr 2025 824th annaproxy 721 105 25ms 8 Jan 2023 824th snoozingnewt 🇨🇦 721 105 130ms 3 Oct 2025 826th Shanethegamer 🇺🇸 721 121 36ms 15 Dec 2022 827th MeWhenI 🇻🇦 720 118 41ms 13 Feb 2025 828th GolfingSuccess 🇬🇷 719 112 4ms 11 Sep 2022 829th Shanethegamer 🇺🇸 718 74 153ms 19 Aug 2024 830th RockOfStone 718 106 2ms 4 Nov 2021 830th frosster 718 106 15ms 26 Mar 2025 832nd targrik 718 164 268ms 30 Jun 2025 833rd dcgjb 717 69 1,035ms 6 May 2024 834th prplz 🇦🇺 715 42 323ms 27 Sep 2021 835th neihousaigaai 715 83 19ms 3 Jan 2022 835th cesarm4 715 83 184ms 16 Apr 2022 835th nstearns96 🇬🇧 715 83 245ms 27 Jan 2023 835th randolchance 715 83 19ms 16 Feb 2023 835th galloj 🇨🇿 715 83 3,253ms 5 Mar 2023 835th yzhs 🇩🇪 715 83 244ms 23 Jun 2023 835th m42km 715 83 304ms 12 Oct 2023 842nd janbehrens 🇩🇪 715 115 428ms 23 Mar 2022 843rd emgordon154 714 100 13ms 27 Dec 2024 844th lynn 714 106 33ms 16 Nov 2021 845th emgordon154 713 36 7ms 3 Nov 2024 846th tayloia 🇬🇧 713 83 12ms 11 May 2023 846th acollett89 713 83 11ms 4 Aug 2025 846th CaedenHarper 🇨🇦 713 83 15ms 15 Sep 2025 849th Yewzir 🇧🇪 713 113 3ms 13 Jan 2024 850th MeWhenI 🇻🇦 712 93 17ms 2 Oct 2022 851st Waffle3z 710 58 119ms 19 Sep 2021 851st emgordon154 710 58 34ms 12 Dec 2021 851st jbbarth 🇫🇷 710 58 37ms 5 Nov 2022 854th MeWhenI 🇻🇦 709 79 494ms 17 Jan 2024 854th namelessiw 709 79 483ms 14 Jul 2024 856th GolfingSuccess 🇬🇷 708 97 3ms 19 Mar 2025 856th dokutan 708 97 6ms 8 Nov 2025 858th Bonjour27891 🇻🇳 706 84 63ms 9 Feb 2022 858th RDShah 706 84 343ms 11 May 2022 858th thehylian 706 84 19ms 2 Jan 2023 858th badboj40 706 84 293ms 12 Feb 2023 858th firegene 🇮🇪 706 84 20ms 22 Dec 2023 858th HumanoidCPU 706 84 23ms 23 Jun 2024 858th moustave 706 84 166ms 26 Nov 2024 865th DialFrost 🇸🇬 706 114 12ms 28 Oct 2024 866th primo-ppcg 🇹🇭 704 71 1,013ms 29 Nov 2021 867th Garklein 🇨🇦 704 84 10ms 20 Feb 2022 868th HumanoidCPU 704 121 99ms 22 Jun 2024 869th MeWhenI 🇻🇦 701 53 141ms 19 Sep 2021 869th GrayJoKing 🇦🇺 701 53 76ms 20 Sep 2021 869th sean-niemann 🇺🇸 701 53 142ms 20 Sep 2021 869th scpchicken 🇵🇼 701 53 143ms 19 Dec 2022 869th Steffan153 🇫🇮 701 53 141ms 27 Jan 2023 869th DialFrost 🇸🇬 701 53 146ms 28 Jan 2023 869th snoozingnewt 🇨🇦 701 53 141ms 1 Sep 2024 869th fuzzylojik-golf 🇺🇸 701 53 95ms 15 Sep 2025 869th blaztoma 🇱🇹 701 53 141ms 25 days ago 878th janbehrens 🇩🇪 701 98 2ms 21 Sep 2021 878th RYNO8 701 98 2ms 16 Aug 2022 880th SirBogman 🇺🇸 700 80 455ms 15 Jan 2024 First Prev 801–880 of 2,025 Next Last