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 641st DialFrost 🇸🇬 779 112 42ms 30 Mar 2025 642nd gnuvince 778 33 36ms 2 Aug 2024 642nd codereport 🇨🇦 778 33 6ms 21 Apr 2025 644th nwellnhof 🇩🇪 777 53 82ms 26 Dec 2021 645th aposteriorist 🇨🇦 776 106 460ms 5 Mar 2022 646th Yax42 🇫🇷 774 98 379ms 6 days ago 647th Re-Adventures 🇮🇳 774 122 74ms 14 Aug 2022 648th prplz 🇦🇺 772 64 1,042ms 20 Sep 2021 649th ListeriaM 772 89 2ms 25 Aug 2023 650th ovs-code 🇩🇪 771 69 134ms 3 Aug 2024 651st SirBogman 🇺🇸 770 39 709ms 20 Sep 2021 651st yzhs 🇩🇪 770 39 36ms 21 Jun 2022 653rd nwellnhof 🇩🇪 770 77 20ms 8 Aug 2022 653rd bricknellj 770 77 192ms 20 Dec 2022 653rd bob-th 770 77 156ms 24 Jan 2023 653rd AlephSquirrel 770 77 268ms 27 Jan 2023 653rd steffan-polygolf 770 77 12ms 8 Mar 2024 653rd Bulmenisaurus 770 77 275ms 8 Oct 2024 653rd ryyyn 🇺🇸 770 77 130ms 13 days ago 660th DialFrost 🇸🇬 770 129 139ms 5 Apr 2025 661st jared-hughes 769 77 10ms 14 Mar 2022 661st Re-Adventures 🇮🇳 769 77 10ms 14 Aug 2022 661st lyphyser 769 77 9ms 3 Jun 2023 661st helbling 🇨🇭 769 77 10ms 4 Jul 2024 665th Shanethegamer 🇺🇸 768 93 13ms 8 Apr 2024 666th KatieLG 🇬🇧 768 111 135ms 14 Jan 2023 667th ovs-code 🇩🇪 768 127 28ms 26 Dec 2022 668th ovs-code 🇩🇪 767 73 852ms 15 Jan 2024 668th sisyphus-ppcg 🇦🇺 767 73 1,444ms 16 Jan 2024 668th bizy-coder 767 73 841ms 3 Oct 2024 671st emgordon154 766 146 18ms 10 Jun 2025 672nd snoozingnewt 🇨🇦 764 92 4,054ms 27 Sep 2025 673rd MeWhenI 🇻🇦 764 244 16ms 28 Aug 2023 674th MeWhenI 🇻🇦 763 54 40ms 16 Aug 2022 674th xsot 🇸🇬 763 54 46ms 25 Jul 2023 674th Steffan153 🇫🇮 763 54 65ms 29 Aug 2024 677th edsrzf 🇳🇿 763 99 20ms 5 Jan 2025 678th janbehrens 🇩🇪 763 165 25ms 20 Sep 2021 679th strout 762 89 172ms 15 Aug 2022 680th kTheLemon 761 100 2ms 2 Apr 2025 681st Babafaba 761 122 395ms 14 Oct 2025 682nd UnderKoen 🇳🇱 761 147 34ms 20 Apr 2023 683rd commandblockguy 🇺🇸 760 78 22ms 22 Aug 2023 683rd ahmetdemirag 🇨🇾 760 78 159ms 11 Feb 2025 685th shawphy 759 78 10ms 12 Oct 2021 686th DialFrost 🇸🇬 759 127 94ms 19 days ago 686th emgordon154 759 127 99ms 14 days ago 688th DialFrost 🇸🇬 758 112 41ms 13 Feb 2025 689th Yewzir 🇧🇪 758 166 25ms 14 Jan 2024 690th Shanethegamer 🇺🇸 757 100 118ms 19 Sep 2021 690th MichalMarsalek 🇨🇿 757 100 125ms 3 Mar 2022 692nd Shanethegamer 🇺🇸 756 93 4,377ms 27 Oct 2024 693rd prplz 🇦🇺 755 91 2ms 19 Dec 2021 693rd Irratix 🇳🇱 755 91 2ms 13 Jun 2022 695th jared-hughes 755 123 428ms 24 Sep 2025 696th jared-hughes 754 101 2ms 17 Mar 2022 697th Irratix 🇳🇱 753 90 141ms 24 Sep 2021 698th Yewzir 🇧🇪 753 99 39ms 18 Dec 2024 699th OllieBoyne 🇬🇧 751 79 185ms 25 May 2022 699th 5cw 🇺🇸 751 79 312ms 8 May 2024 699th bzijlema 🇳🇱 751 79 321ms 11 Oct 2024 699th jipsong 🇩🇪 751 79 293ms 20 Jun 2025 699th InigoK 🇺🇸 751 79 182ms 5 Sep 2025 699th fuzzylojik-golf 🇺🇸 751 79 178ms 15 Sep 2025 705th MeWhenI 🇻🇦 751 95 14ms 23 May 2023 706th prplz 🇦🇺 750 66 1,368ms 27 Sep 2021 706th DialFrost 🇸🇬 750 66 665ms 10 Oct 2024 708th prplz 🇦🇺 749 55 38ms 18 Dec 2021 708th lynn 749 55 84ms 25 May 2022 708th anter69 🇭🇺 749 55 34ms 25 Jan 2023 708th ovs-code 🇩🇪 749 55 66ms 9 May 2023 708th Natanaelel 🇸🇪 749 55 38ms 10 May 2023 713th alasdair-greenland 749 79 22ms 10 Nov 2021 713th igmcdowell 749 79 10ms 11 Dec 2021 713th dylanarmstrong 749 79 12ms 24 Jan 2024 716th trist224 🇫🇷 749 126 491ms 15 Nov 2022 717th Shanethegamer 🇺🇸 749 168 24ms 20 Sep 2021 718th yzhs 🇩🇪 748 66 989ms 5 Nov 2021 719th Yewzir 🇧🇪 748 110 472ms 13 Jan 2024 720th m-tkach 🇺🇦 747 75 437ms 20 Jan 2024 First Prev 641–720 of 2,025 Next Last