The Tower of Hanoi hole will go live in approximately 27 hours. Why not try and solve it ahead of time?
ISBN 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 299th thisishowmymindworks 🇳🇴 866 82 9ms 10 Jun 2023 302nd MeWhenI 🇻🇦 865 90 102ms 20 Oct 2022 303rd edsrzf 🇳🇿 865 95 97ms 37 hours ago 304th anter69 🇭🇺 865 102 9ms 13 Jan 2022 304th Irratix 🇳🇱 865 102 9ms 5 Jul 2022 304th b10011 🇫🇮 865 102 10ms 14 Jan 2023 304th CornerMercury 🇬🇧 865 102 9ms 13 Sep 2023 304th ndren 865 102 10ms 4 Oct 2023 304th zacjl 865 102 12ms 21 Oct 2023 304th Just4FunCoder 865 102 10ms 17 Feb 2024 304th Yewzir 🇧🇪 865 102 9ms 22 Jun 2024 304th bzijlema 🇳🇱 865 102 9ms 15 Oct 2024 304th moustave 865 102 9ms 25 Jun 2025 304th blaztoma 🇱🇹 865 102 10ms 9 Oct 2025 304th Babafaba 865 102 10ms 23 hours ago 316th sisyphus-ppcg 🇦🇺 864 88 79ms 13 Dec 2022 317th primo-ppcg 🇹🇭 864 97 4ms 4 Jul 2023 318th prplz 🇦🇺 864 109 2ms 18 Jan 2022 318th xsot 🇸🇬 864 109 2ms 1 Feb 2024 320th edsrzf 🇳🇿 863 124 330ms 24 Sep 2025 320th dokutan 863 124 344ms 24 Sep 2025 322nd arjanadriaanse 🇳🇱 863 130 181ms 8 Feb 2022 322nd annaproxy 863 130 165ms 8 Feb 2022 324th nwellnhof 🇩🇪 862 54 7ms 22 May 2022 325th ovs-code 🇩🇪 862 63 33ms 9 May 2023 325th nwellnhof 🇩🇪 862 63 37ms 18 Jul 2023 327th Shanethegamer 🇺🇸 861 36 3ms 16 Jan 2022 327th AlephSquirrel 861 36 38ms 29 Dec 2022 327th bstrat 861 36 2ms 1 Jul 2024 330th DialFrost 🇸🇬 861 72 686ms 4 Sep 2025 330th sean-niemann 🇺🇸 861 72 716ms 16 Sep 2025 332nd rucin93 🇵🇱 861 102 2ms 10 Jul 2025 333rd primo-ppcg 🇹🇭 861 151 43ms 26 Apr 2025 334th edsrzf 🇳🇿 860 103 107ms 17 Oct 2025 335th prplz 🇦🇺 860 128 57ms 19 Jan 2022 336th lynn 860 148 31ms 18 Jul 2023 337th MeWhenI 🇻🇦 859 90 356ms 9 Aug 2023 338th ovs-code 🇩🇪 859 119 19ms 4 Jul 2024 338th GrayJoKing 🇦🇺 859 119 18ms 5 Jul 2024 340th JayXon 🇺🇸 859 172 1,725ms 22 Apr 2024 341st ovs-code 🇩🇪 858 89 373ms 5 Jul 2024 341st Steffan153 🇫🇮 858 89 394ms 7 Aug 2024 343rd primo-ppcg 🇹🇭 858 95 4ms 21 Aug 2023 343rd Shanethegamer 🇺🇸 858 95 4ms 25 Mar 2024 345th Shanethegamer 🇺🇸 858 122 1,300ms 21 Apr 2022 346th primo-ppcg 🇹🇭 857 61 2ms 19 Nov 2022 347th MeWhenI 🇻🇦 857 84 10ms 2 Aug 2023 348th MeWhenI 🇻🇦 857 90 13ms 15 Jan 2025 349th SirBogman 🇺🇸 857 103 10ms 10 May 2022 349th janbehrens 🇩🇪 857 103 9ms 23 Jun 2023 349th FlorianCassayre 🇫🇷 857 103 10ms 9 Sep 2023 349th orthoplex 🇨🇽 857 103 10ms 25 Nov 2023 349th abc7-12 857 103 9ms 26 Jun 2024 349th KatieLG 🇬🇧 857 103 10ms 8 Jul 2024 349th madex 🇩🇪 857 103 9ms 7 Aug 2025 349th CaedenHarper 🇨🇦 857 103 10ms 15 Aug 2025 349th snoozingnewt 🇺🇸 857 103 10ms 6 days ago 358th Natanaelel 🇸🇪 857 131 167ms 18 May 2025 359th Irratix 🇳🇱 856 110 2ms 14 May 2022 359th speles 🇺🇦 856 110 2ms 29 Oct 2023 361st primo-ppcg 🇹🇭 856 117 41ms 20 Jun 2022 362nd CaedenHarper 🇨🇦 856 125 350ms 3 Oct 2025 363rd m-tkach 🇺🇦 855 83 9ms 10 Jan 2022 363rd trinityy-7 855 83 9ms 13 Mar 2024 363rd penbuvt 855 83 10ms 7 Nov 2024 366th targrik 855 98 5ms 30 Jan 2025 367th snoozingnewt 🇺🇸 854 89 75ms 6 days ago 368th clockworknazo 854 129 3ms 18 Sep 2022 369th GrayJoKing 🇦🇺 853 95 72ms 18 Sep 2023 370th MeWhenI 🇻🇦 853 103 2ms 13 Oct 2023 371st Shanethegamer 🇺🇸 853 113 457ms 21 Apr 2022 371st Steffan153 🇫🇮 853 113 475ms 23 Jul 2024 371st sean-niemann 🇺🇸 853 113 465ms 23 Mar 2025 374th ovs-code 🇩🇪 853 129 57ms 10 Feb 2023 375th stefangimmillaro 853 156 261ms 20 Oct 2023 First Prev 301–375 of 1,553 Next Last