The Tower of Hanoi hole will go live in approximately 2 days. Why not try and solve it ahead of time?
Pernicious 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 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 Chars Time Submitted 676th snoozingnewt 🇺🇸 756 55 225ms 9 Oct 2025 677th Alex-x90 🇺🇸 755 97 55ms 20 Nov 2022 678th DialFrost 🇸🇬 754 71 63ms 7 Dec 2024 679th MeWhenI 🇻🇦 753 66 61ms 14 May 2023 680th aksyristos 752 66 21ms 17 Jan 2023 680th OllieBoyne 🇬🇧 752 66 18ms 28 Feb 2023 680th randolchance 752 66 28ms 12 Mar 2023 680th CheeseCake628 🇳🇴 752 66 20ms 19 Mar 2023 680th adamnielson42 🇺🇸 752 66 18ms 31 Mar 2023 680th ehulinsky 🇺🇸 752 66 20ms 8 May 2023 680th TheoKeller1 752 66 25ms 11 Jun 2023 680th dranjohn 752 66 19ms 11 Sep 2023 680th inverseLorentz 🇦🇺 752 66 26ms 23 Oct 2023 680th RedzGoose 🇦🇺 752 66 17ms 23 Oct 2024 680th JunkIce 752 66 20ms 24 Nov 2024 680th yokasuretsu 752 66 17ms 7 Jan 2025 680th croc54 752 66 18ms 13 Jan 2025 680th ejini6969 752 66 17ms 14 Jun 2025 680th osNiko 🇧🇷 752 66 29ms 20 Aug 2025 680th Troon 752 66 24ms 22 Aug 2025 696th Steffan153 🇫🇮 752 78 34ms 14 Jul 2023 696th GrayJoKing 🇦🇺 752 78 38ms 13 Aug 2023 696th kg583 🇺🇸 752 78 31ms 2 Oct 2025 699th Yewzir 🇧🇪 751 90 435ms 12 Feb 2024 700th dokutan 750 32 2ms 14 Nov 2024 701st retrohun 750 64 4,257ms 5 Nov 2023 702nd Shanethegamer 🇺🇸 750 81 1,332ms 30 Nov 2022 703rd inventshah 749 59 12ms 20 Nov 2022 703rd Argeento 🇵🇱 749 59 13ms 26 Aug 2023 705th Natanaelel 🇸🇪 747 38 177ms 5 Jan 2024 706th MeWhenI 🇻🇦 747 98 56ms 9 Apr 2024 706th snoozingnewt 🇺🇸 747 98 366ms 6 Oct 2025 708th m-tkach 🇺🇦 747 106 35ms 13 Mar 2023 709th janbehrens 🇩🇪 745 116 263ms 20 Nov 2022 710th janbehrens 🇩🇪 744 63 13ms 20 Nov 2022 711th msbranicky 744 92 125ms 1 Oct 2023 712th Yewzir 🇧🇪 743 72 30ms 6 Mar 2024 713th Kaffeleif 742 71 24ms 8 Feb 2024 713th DialFrost 🇸🇬 742 71 23ms 15 Dec 2024 713th snoozingnewt 🇺🇸 742 71 27ms 9 Oct 2025 716th dokutan 742 92 27ms 4 days ago 717th bob-th 741 67 24ms 23 Dec 2022 717th n0Oo0Oo0b 741 67 17ms 29 Dec 2022 717th betaveros 741 67 34ms 31 Dec 2022 717th vgamula 🇺🇦 741 67 18ms 15 Mar 2023 717th HumanoidCPU 741 67 21ms 19 Feb 2025 717th VictorStenvers 🇳🇱 741 67 19ms 26 Mar 2025 723rd janbehrens 🇩🇪 740 99 58ms 20 Nov 2022 723rd Yewzir 🇧🇪 740 99 51ms 12 Feb 2024 725th Steffan153 🇫🇮 738 65 1,425ms 14 Jan 2023 726th thisishowmymindworks 🇳🇴 736 60 11ms 19 Jun 2024 726th stefangimmillaro 736 60 11ms 4 Sep 2024 726th targrik 736 60 12ms 6 Feb 2025 729th m-tkach 🇺🇦 735 72 4ms 22 Nov 2022 729th emplv 🇱🇻 735 72 5ms 30 Nov 2022 729th Steffan153 🇫🇮 735 72 4ms 3 Jan 2023 729th sean-niemann 🇺🇸 735 72 5ms 7 May 2024 729th solisolu 735 72 4ms 8 days ago 734th dokutan 735 92 439ms 15 Jul 2025 735th rucin93 🇵🇱 734 63 8ms 9 days ago 736th snoozingnewt 🇺🇸 733 118 260ms 9 Oct 2025 737th Steffan153 🇫🇮 731 106 34ms 14 Jan 2023 738th GrayJoKing 🇦🇺 730 61 149ms 31 Aug 2024 739th MaxElf999 730 68 20ms 21 Nov 2022 739th guilhem-roy 🇫🇷 730 68 21ms 21 Nov 2022 739th knutae 🇳🇴 730 68 23ms 30 Nov 2022 739th 4ndyJ 🇬🇧 730 68 19ms 10 Jan 2023 739th andre-lameirinhas 🇵🇹 730 68 20ms 18 May 2023 739th WillConker 730 68 17ms 16 Jul 2023 739th AforAmpere 730 68 17ms 20 Sep 2023 739th Simpos 730 68 26ms 24 Oct 2023 739th mikehanus 730 68 28ms 22 Nov 2023 739th chartung17 730 68 19ms 31 Dec 2023 739th mathisfun271 730 68 24ms 13 Feb 2024 739th 77Tigers 730 68 17ms 22 Jun 2024 First Prev 676–750 of 1,783 Next Last