The Tower of Hanoi hole will go live in approximately 12 hours. Why not try and solve it ahead of time?
Collatz 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 299th GrayJoKing 🇦🇺 915 71 123ms 8 May 2022 299th JayXon 🇺🇸 915 71 124ms 8 May 2022 299th Steffan153 🇫🇮 915 71 120ms 9 Mar 2023 299th Shanethegamer 🇺🇸 915 71 128ms 15 May 2023 299th MeWhenI 🇻🇦 915 71 121ms 8 Aug 2023 299th sean-niemann 🇺🇸 915 71 122ms 9 Jan 2025 307th Steffan153 🇫🇮 915 76 11ms 15 May 2023 307th primo-ppcg 🇹🇭 915 76 18ms 15 May 2023 307th Lydxn 🇨🇦 915 76 8ms 22 May 2023 307th GrayJoKing 🇦🇺 915 76 12ms 24 Aug 2023 311th edsrzf 🇳🇿 914 54 796ms 13 Sep 2025 311th CaedenHarper 🇨🇦 914 54 817ms 27 Sep 2025 311th sean-niemann 🇺🇸 914 54 818ms 27 Sep 2025 311th albanian-laundromat 914 54 859ms 16 days ago 311th xsot 🇸🇬 914 54 811ms 14 days ago 316th xnor-gate 914 63 194ms 20 Jan 2025 317th arctouch-cristiannevianna 913 85 321ms 3 Apr 2023 317th Widgitty 913 85 326ms 1 Sep 2023 317th tomtheisen 🇺🇸 913 85 344ms 10 Apr 2025 320th kmathis22 913 91 354ms 9 days ago 321st Steffan153 🇫🇮 912 71 6ms 10 Dec 2022 321st synt7x 🇺🇸 912 71 4ms 7 Jul 2025 323rd pardouin 🇫🇷 912 72 3,105ms 21 May 2025 324th edsrzf 🇳🇿 912 78 18ms 16 Aug 2025 325th primo-ppcg 🇹🇭 911 61 6ms 6 May 2022 325th sisyphus-ppcg 🇦🇺 911 61 9ms 14 Jul 2022 327th Lydxn 🇨🇦 911 70 96ms 7 May 2022 327th JayXon 🇺🇸 911 70 96ms 7 May 2022 329th Steffan153 🇫🇮 911 71 108ms 14 Oct 2022 329th Shanethegamer 🇺🇸 911 71 111ms 15 Oct 2022 329th stefangimmillaro 911 71 103ms 16 Oct 2022 329th MeWhenI 🇻🇦 911 71 102ms 16 Oct 2022 333rd annaproxy 911 78 128ms 13 Jan 2023 333rd IanUtley 911 78 119ms 12 Nov 2023 333rd GrayJoKing 🇦🇺 911 78 84ms 28 Nov 2023 336th Shanethegamer 🇺🇸 911 86 390ms 15 May 2023 336th JayXon 🇺🇸 911 86 508ms 15 May 2023 336th Steffan153 🇫🇮 911 86 389ms 16 May 2023 336th Lydxn 🇨🇦 911 86 465ms 16 May 2023 336th GrayJoKing 🇦🇺 911 86 400ms 11 Aug 2023 336th sean-niemann 🇺🇸 911 86 458ms 11 Jul 2024 342nd Bubbler-4 910 33 2,611ms 6 May 2022 342nd rak1507 🇬🇧 910 33 112ms 8 May 2022 342nd ngn 🇧🇬 910 33 25ms 11 May 2022 342nd zacjl 910 33 33ms 3 Jun 2025 342nd GrayJoKing 🇦🇺 910 33 15ms 4 Jun 2025 342nd HPWiz 🇳🇿 910 33 9ms 14 days ago 348th andersk 🇺🇸 910 91 120ms 25 Oct 2022 348th Super-Pizza 🇨🇦 910 91 127ms 4 Dec 2022 348th klixel 🇨🇦 910 91 121ms 20 May 2023 348th lynn 910 91 127ms 6 Jul 2024 348th edsrzf 🇳🇿 910 91 124ms 29 Nov 2024 348th DialFrost 🇸🇬 910 91 122ms 7 Apr 2025 354th Lydxn 🇨🇦 909 47 249ms 5 May 2022 355th JayXon 🇺🇸 909 53 443ms 17 Aug 2024 356th tailorspy 909 93 53ms 27 May 2024 356th sean-niemann 🇺🇸 909 93 54ms 9 Jun 2025 356th KasperKivimaeki 🇫🇮 909 93 55ms 26 Oct 2025 359th ovs-code 🇩🇪 908 75 74ms 12 Sep 2024 359th Kacarott 🇦🇺 908 75 78ms 13 Sep 2024 361st Lydxn 🇨🇦 908 81 45ms 1 Apr 2023 362nd Shanethegamer 🇺🇸 907 61 4ms 9 Oct 2023 362nd edsrzf 🇳🇿 907 61 4ms 4 Jul 2025 364th nai62 907 68 8ms 27 Aug 2022 365th GrayJoKing 🇦🇺 907 74 64ms 1 Nov 2023 366th lynn 907 78 1,328ms 5 May 2022 367th ovs-code 🇩🇪 905 67 92ms 13 Dec 2022 367th Steffan153 🇫🇮 905 67 99ms 18 Dec 2022 367th Lydxn 🇨🇦 905 67 105ms 4 Feb 2023 367th DialFrost 🇸🇬 905 67 90ms 17 Mar 2025 371st primo-ppcg 🇹🇭 905 93 42ms 7 May 2022 371st AlephSquirrel 905 93 30ms 21 Jan 2023 371st kg583 🇺🇸 905 93 29ms 26 Dec 2024 371st CLOStrophobic 🇮🇹 905 93 31ms 17 Jan 2025 371st edsrzf 🇳🇿 905 93 30ms 3 Jul 2025 First Prev 301–375 of 3,469 Next Last