The Tower of Hanoi hole will go live in approximately 36 hours. Why not try and solve it ahead of time?
Happy Numbers in all languages 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 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 NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Tower of Hanoi 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 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 NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Tower of Hanoi Turtle Tutorial # Golfer Points Bytes Time Submitted 669th m42km 880 69 9ms 7 Oct 2023 669th elgan65536 880 69 10ms 4 Apr 2024 678th Yewzir 🇧🇪 880 79 103ms 6 Dec 2023 679th JayXon 🇺🇸 880 143 1,608ms 15 Sep 2025 680th primo-ppcg 🇹🇭 878 50 39ms 11 Oct 2020 680th o0lit3 🇺🇸 878 50 11ms 19 Apr 2021 680th armin-k1 878 50 9ms 8 Sep 2021 680th nwellnhof 🇩🇪 878 50 18ms 26 Dec 2021 680th Lydxn 🇨🇦 878 50 40ms 25 May 2022 680th saito-ta 🇯🇵 878 50 20ms 27 May 2022 686th sean-niemann 🇺🇸 877 88 384ms 6 Aug 2024 687th snoozingnewt 🇺🇸 877 95 335ms 11 hours ago 688th primo-ppcg 🇹🇭 877 116 264ms 21 Apr 2020 688th kkoenig 877 116 251ms 5 Jan 2024 690th KatieLG-Transpiler 🇬🇧 876 149 10ms 24 Jun 2022 691st primo-ppcg 🇹🇭 875 53 239ms 19 Oct 2020 691st MeWhenI 🇻🇦 875 53 263ms 15 Feb 2023 693rd alo-gin 874 54 44ms 19 Oct 2018 693rd hrrs01 874 54 110ms 14 Apr 2020 693rd jared-hughes 874 54 33ms 9 Sep 2022 693rd ovs-code 🇩🇪 874 54 68ms 9 May 2023 697th hemphen 874 84 342ms 28 Aug 2022 698th primo-ppcg 🇹🇭 873 77 1ms 13 Jul 2021 699th nwellnhof 🇩🇪 873 99 51ms 3 Jan 2022 699th Alex-x90 🇺🇸 873 99 53ms 20 Sep 2022 699th Steffan153 🇫🇮 873 99 51ms 28 Jan 2023 699th ovs-code 🇩🇪 873 99 48ms 3 Jun 2024 699th roupiq 🇵🇱 873 99 54ms 8 Jun 2024 699th Herbert00709 🇵🇱 873 99 53ms 8 Jun 2024 699th sean-niemann 🇺🇸 873 99 48ms 6 Aug 2024 706th edsrzf 🇳🇿 872 95 1ms 5 Mar 2025 707th DialFrost 🇸🇬 871 148 550ms 12 Jan 2025 707th emgordon154 871 148 496ms 12 Jan 2025 707th Shanethegamer 🇺🇸 871 148 456ms 13 Jan 2025 707th KatieLG 🇬🇧 871 148 500ms 13 Jan 2025 707th HumanoidCPU 871 148 501ms 13 Jan 2025 707th dokutan 871 148 479ms 13 Jan 2025 707th GolfingSuccess 🇬🇷 871 148 481ms 18 Jan 2025 707th ovs-code 🇩🇪 871 148 489ms 24 Jan 2025 707th CaedenHarper 🇨🇦 871 148 501ms 25 Jan 2025 707th MeWhenI 🇻🇦 871 148 477ms 9 Feb 2025 707th pardouin 🇫🇷 871 148 522ms 25 Feb 2025 707th albanian-laundromat 871 148 524ms 25 Jul 2025 719th AdrienHache 🇫🇷 870 82 2ms 7 Jan 2024 719th pardouin 🇫🇷 870 82 2ms 8 Oct 2024 719th LostSyntax21 🇬🇧 870 82 2ms 8 Jan 2025 719th TeodorDyakov 🇧🇬 870 82 2ms 5 Mar 2025 723rd msbranicky 870 117 260ms 8 Sep 2023 724th primo-ppcg 🇹🇭 869 69 9ms 27 Nov 2019 724th jakzo 869 69 12ms 5 Sep 2021 724th Shanethegamer 🇺🇸 869 69 10ms 25 Apr 2023 727th dcgjb 868 57 206ms 6 May 2024 728th ArmaanAS 868 70 9ms 8 Mar 2021 728th Hebelub 868 70 10ms 5 Jan 2024 728th Dataen 868 70 10ms 5 Jan 2024 728th dokutan 868 70 10ms 23 Jan 2024 732nd duckyluuk 🇳🇱 867 70 2,797ms 26 Oct 2024 733rd snoozingnewt 🇺🇸 867 89 375ms 11 hours ago 734th lynn 866 34 41ms 13 Apr 2021 734th jared-hughes 866 34 34ms 30 Sep 2021 734th Natanaelel 🇸🇪 866 34 43ms 28 Nov 2023 734th primo-ppcg 🇹🇭 866 34 37ms 24 Mar 2025 734th SirBogman 🇺🇸 866 34 36ms 8 Jul 2025 734th fuzzylojik-golf 🇺🇸 866 34 35ms 9 Sep 2025 740th MeWhenI 🇻🇦 866 61 3ms 23 May 2023 741st DialFrost 🇸🇬 866 73 1,398ms 12 Oct 2023 742nd Steffan153 🇫🇮 866 81 2ms 3 Feb 2023 742nd GrayJoKing 🇦🇺 866 81 3ms 12 Feb 2023 744th ovs-code 🇩🇪 866 95 28ms 10 Jan 2023 745th GrayJoKing 🇦🇺 865 61 401ms 15 Jan 2024 745th namelessiw 865 61 337ms 5 Mar 2024 745th neel11235813 865 61 392ms 10 Mar 2024 745th duckyluuk 🇳🇱 865 61 476ms 14 Jul 2024 745th b-illy 🇬🇧 865 61 398ms 14 Sep 2024 745th DialFrost 🇸🇬 865 61 426ms 26 Dec 2024 First Prev 676–750 of 3,123 Next Last