The Tower of Hanoi hole will go live in approximately 70 mins. 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 825th pardouin 🇫🇷 841 99 1ms 21 Sep 2024 825th sean-niemann 🇺🇸 841 99 1ms 9 May 2025 828th snoozingnewt 🇺🇸 840 80 2ms 45 hours ago 829th HumanEquivalentUnit 839 59 307ms 10 Oct 2020 830th Laar 839 81 177ms 1 Apr 2019 830th alomiF 839 81 171ms 5 Oct 2023 830th brimstonetrader 839 81 134ms 26 Jan 2024 833rd annaproxy 839 85 2ms 18 May 2023 834th MeWhenI 🇻🇦 839 92 450ms 10 Oct 2022 835th AdrienHache 🇫🇷 839 103 49ms 7 Jan 2024 836th Yewzir 🇧🇪 838 79 3ms 22 Dec 2023 836th albanian-laundromat 838 79 2ms 24 Jun 2025 838th edsrzf 🇳🇿 838 97 123ms 4 Mar 2025 839th SirFireball3521 836 45 145ms 22 Mar 2023 840th GrayJoKing 🇦🇺 836 80 98ms 15 Jul 2023 841st Shanethegamer 🇺🇸 833 30 3ms 13 Jan 2022 842nd PatrickStephansen 🇿🇦 833 72 12ms 3 Nov 2020 842nd KatieLG 🇬🇧 833 72 11ms 16 Apr 2021 842nd neihousaigaai 833 72 10ms 18 Apr 2021 842nd two-bad 🇬🇧 833 72 10ms 25 Feb 2024 846th mogron 832 73 9ms 13 Dec 2019 846th FlorianCassayre 🇫🇷 832 73 12ms 30 Oct 2022 846th StefanHabel 🇨🇦 832 73 10ms 11 Dec 2022 846th DrakeSeteraO 832 73 9ms 25 Oct 2025 850th duckyluuk 🇳🇱 831 73 5ms 16 Dec 2024 851st acacopardo 831 76 13ms 14 Nov 2017 851st MeWhenI 🇻🇦 831 76 13ms 15 Sep 2021 851st DaCuteRaccoon 831 76 13ms 30 Nov 2022 854th marshallward 🇺🇸 831 81 41ms 2 Sep 2022 855th Lydxn 🇨🇦 831 83 1ms 10 Oct 2023 856th djeedjay 🇳🇱 830 86 2ms 26 Oct 2020 856th Yewzir 🇧🇪 830 86 2ms 22 Dec 2023 858th fuzzylojik-golf 🇺🇸 830 93 433ms 30 Aug 2025 859th kgodara 830 98 125ms 11 Mar 2023 860th CLOStrophobic 🇮🇹 830 102 41ms 14 Feb 2025 861st GrayJoKing 🇦🇺 829 53 18ms 10 Apr 2021 861st scpchicken 🇵🇼 829 53 32ms 23 May 2021 861st kurkale6ka 829 53 19ms 16 Jun 2021 861st sean-niemann 🇺🇸 829 53 32ms 7 Sep 2021 861st MeWhenI 🇻🇦 829 53 33ms 15 Sep 2021 861st DaCuteRaccoon 829 53 32ms 30 Nov 2022 861st Steffan153 🇫🇮 829 53 32ms 28 Jan 2023 861st DialFrost 🇸🇬 829 53 33ms 28 Jan 2023 861st snoozingnewt 🇺🇸 829 53 48ms 1 Sep 2024 861st LostSyntax21 🇬🇧 829 53 35ms 8 Jan 2025 861st fuzzylojik-golf 🇺🇸 829 53 19ms 15 Sep 2025 872nd primo-ppcg 🇹🇭 829 67 89ms 25 Dec 2020 872nd lynn 829 67 126ms 18 May 2021 872nd Yewzir 🇧🇪 829 67 98ms 17 Sep 2023 872nd sean-niemann 🇺🇸 829 67 95ms 8 Oct 2024 876th jared-hughes 829 82 158ms 11 Sep 2023 877th anter69 🇭🇺 828 57 36ms 3 Aug 2021 877th annaproxy 828 57 55ms 27 Aug 2022 877th BREMAUCY 🇫🇷 828 57 41ms 26 Mar 2024 880th inventshah 827 80 3ms 9 Sep 2022 881st Shanethegamer 🇺🇸 826 64 3ms 25 Apr 2023 882nd m-tkach 🇺🇦 825 64 376ms 30 Jan 2024 883rd dokutan 825 101 353ms 24 Sep 2025 884th didion0 🇺🇸 822 73 13ms 22 Apr 2021 884th itsh01 822 73 14ms 16 Aug 2021 884th c0d3-4-F00d 🇩🇪 822 73 9ms 5 Jan 2022 884th DaCuteRaccoon 822 73 10ms 30 Nov 2022 884th janbehrens 🇩🇪 822 73 10ms 17 Jun 2023 884th Yax42 🇫🇷 822 73 9ms 18 days ago 890th DialFrost 🇸🇬 822 103 40ms 16 Feb 2025 891st ovs-code 🇩🇪 822 153 1,544ms 14 Sep 2025 891st primo-ppcg 🇹🇭 822 153 1,500ms 15 Sep 2025 891st emgordon154 822 153 1,501ms 16 Sep 2025 891st Yewzir 🇧🇪 822 153 1,551ms 16 days ago 895th KatieLG 🇬🇧 821 74 15ms 5 Nov 2020 895th trist224 🇫🇷 821 74 10ms 15 Nov 2022 895th QuincyNash 🇺🇸 821 74 9ms 29 Nov 2022 898th snoozingnewt 🇺🇸 820 74 2,024ms 45 hours ago 899th AaronGarbut 820 87 2ms 30 Jul 2019 900th phdphil 818 46 140ms 9 Apr 2018 First Prev 826–900 of 3,126 Next Last