The Calendar hole will go live in approximately 8 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 401st ovs-code 🇩🇪 857 96 422ms 29 Jul 2024 402nd Shanethegamer 🇺🇸 856 98 5ms 20 Dec 2024 403rd saito-ta 🇯🇵 852 27 570ms 12 Aug 2022 403rd GolfingSuccess 🇬🇷 852 27 457ms 16 Aug 2022 403rd clockworknazo 852 27 570ms 6 Sep 2022 403rd orthoplex 🇨🇽 852 27 791ms 1 Feb 2024 407th DialFrost 🇸🇬 852 89 378ms 16 Nov 2025 408th DialFrost 🇸🇬 851 58 1,134ms 13 Apr 2025 409th ovs-code 🇩🇪 851 89 12ms 30 Jun 2024 410th CLOStrophobic 🇮🇹 851 116 506ms 10 Feb 2025 411th emplv 🇱🇻 850 148 24ms 29 Jun 2022 412th MeWhenI 🇻🇦 849 72 85ms 13 Dec 2022 413th MeWhenI 🇻🇦 849 77 64ms 19 Sep 2021 413th snoozingnewt 🇨🇦 849 77 61ms 16 Oct 2025 415th The3gs 849 117 129ms 29 Nov 2024 416th Shanethegamer 🇺🇸 848 66 584ms 16 Jan 2024 416th snoozingnewt 🇨🇦 848 66 581ms 28 Sep 2025 416th Babafaba 848 66 637ms 3 Nov 2025 419th CaedenHarper 🇨🇦 848 71 824ms 11 Sep 2025 420th marcin7Cd 848 80 146ms 29 Sep 2021 420th cbrt-x 848 80 154ms 15 Sep 2023 422nd Steffan153 🇫🇮 848 81 3ms 12 Jan 2023 423rd Lydxn 🇨🇦 848 90 40ms 20 Sep 2021 423rd Steffan153 🇫🇮 848 90 40ms 12 Jan 2023 423rd stefangimmillaro 848 90 40ms 26 Jan 2023 423rd MeWhenI 🇻🇦 848 90 41ms 14 May 2023 423rd DialFrost 🇸🇬 848 90 41ms 22 Oct 2024 428th lynn 848 115 28ms 21 Aug 2023 429th edsrzf 🇳🇿 848 139 268ms 23 Oct 2024 430th MeWhenI 🇻🇦 847 50 20ms 15 Feb 2025 431st MeWhenI 🇻🇦 847 70 19ms 22 Oct 2021 431st 2011-Chan-Ethan 847 70 328ms 12 Jul 2023 431st jatloe 847 70 331ms 27 Sep 2024 431st Flekay 🇩🇪 847 70 224ms 10 Jul 2025 431st JOrE20 🇺🇸 847 70 21ms 19 days ago 436th inventshah 847 83 3,973ms 24 Oct 2024 436th aditsu 847 83 3,673ms 10 Aug 2025 438th duckyluuk 🇳🇱 847 88 28ms 12 Dec 2024 438th GolfingSuccess 🇬🇷 847 88 22ms 11 Sep 2025 440th snoozingnewt 🇨🇦 847 99 4ms 1 Sep 2024 441st Lydxn 🇨🇦 846 89 142ms 4 Sep 2023 442nd ovs-code 🇩🇪 845 190 18ms 9 Jul 2024 443rd emplv 🇱🇻 844 63 133ms 17 Jul 2025 444th Shanethegamer 🇺🇸 844 110 447ms 25 Sep 2025 444th Yewzir 🇧🇪 844 110 446ms 2 Oct 2025 444th CaedenHarper 🇨🇦 844 110 480ms 5 Nov 2025 444th MeWhenI 🇻🇦 844 110 427ms 7 Nov 2025 448th Irratix 🇳🇱 843 112 61ms 3 Jan 2022 449th MeWhenI 🇻🇦 843 163 565ms 28 Mar 2025 450th Yewzir 🇧🇪 842 118 127ms 5 Feb 2024 451st janbehrens 🇩🇪 842 140 268ms 20 Sep 2021 452nd ovs-code 🇩🇪 842 180 1,738ms 14 Sep 2025 452nd Yewzir 🇧🇪 842 180 2,518ms 14 Nov 2025 454th rucin93 🇵🇱 840 86 2ms 19 Nov 2025 455th DialFrost 🇸🇬 840 98 379ms 16 Nov 2025 456th emplv 🇱🇻 838 78 49ms 19 Apr 2024 457th edsrzf 🇳🇿 838 81 235ms 8 mins ago 458th primo-ppcg 🇹🇭 838 82 1ms 22 Sep 2021 458th nwellnhof 🇩🇪 838 82 2ms 22 Sep 2021 458th Attero 🇸🇪 838 82 3ms 23 Dec 2021 458th c0d3-4-F00d 🇩🇪 838 82 3ms 5 Jan 2022 458th snoozingnewt 🇨🇦 838 82 3ms 13 Sep 2025 463rd jared-hughes 837 181 1,666ms 16 Sep 2025 463rd MeWhenI 🇻🇦 837 181 1,677ms 7 Nov 2025 465th dokutan 836 67 590ms 4 Feb 2025 466th Shanethegamer 🇺🇸 836 95 106ms 14 Oct 2022 466th emplv 🇱🇻 836 95 101ms 28 Oct 2022 466th Yewzir 🇧🇪 836 95 100ms 28 Mar 2024 469th stefangimmillaro 836 111 528ms 6 Oct 2025 469th kmathis22 836 111 403ms 20 Nov 2025 469th ethanlally 836 111 366ms 23 Nov 2025 469th dokutan 836 111 411ms 23 Nov 2025 469th snoozingnewt 🇨🇦 836 111 387ms 17 days ago 474th MeWhenI 🇻🇦 836 113 84ms 29 Nov 2022 475th lynn 835 119 148ms 10 Mar 2022 475th ovs-code 🇩🇪 835 119 130ms 23 Jun 2023 475th mousetail 🇳🇱 835 119 131ms 15 Jan 2024 478th rak1507 🇬🇧 834 36 36ms 20 Sep 2021 478th Steffan153 🇫🇮 834 36 260ms 16 Dec 2022 478th ovs-code 🇩🇪 834 36 287ms 31 Dec 2023 First Prev 401–480 of 2,023 Next Last