The Tower of Hanoi hole will go live in approximately 2 days. Why not try and solve it ahead of time?
Emirp Numbers 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 601st dokutan 774 92 122ms 14 Apr 2024 602nd nstearns96 🇬🇧 772 70 15ms 6 Jan 2023 602nd sunleonid 772 70 10ms 4 days ago 604th jacobly0 🇺🇸 772 124 1,682ms 22 Apr 2024 605th sisyphus-ppcg 🇦🇺 769 50 5ms 14 Jul 2022 606th MarcMush 🇫🇷 769 58 246ms 5 Jul 2021 607th DialFrost 🇸🇬 769 74 6ms 17 Aug 2025 608th xohmz 768 48 90ms 4 Nov 2018 608th JRaspass 🇬🇧 768 48 86ms 29 Oct 2022 610th bforte 768 86 131ms 26 Dec 2018 611th SirBogman 🇺🇸 767 52 38ms 3 Dec 2019 611th prplz 🇦🇺 767 52 34ms 3 Dec 2019 611th MeWhenI 🇻🇦 767 52 34ms 26 Oct 2021 614th MeWhenI 🇻🇦 767 72 112ms 17 Nov 2022 614th dokutan 767 72 119ms 11 Apr 2024 616th GrayJoKing 🇦🇺 765 86 2ms 12 Mar 2022 617th ovs-code 🇩🇪 762 69 133ms 17 Nov 2024 618th Yewzir 🇧🇪 762 93 53ms 3 Aug 2023 619th NewDefectus 🇮🇱 761 71 10ms 16 Dec 2021 619th rschwa6308 🇺🇸 761 71 10ms 12 May 2023 619th zbreit 🇺🇸 761 71 10ms 20 May 2023 619th blaztoma 🇱🇹 761 71 10ms 18 days ago 623rd emgordon154 760 123 251ms 17 Jan 2025 624th ngn 🇧🇬 758 33 38ms 6 Feb 2022 625th detrumi 🇳🇱 757 94 124ms 26 Apr 2023 626th antimon2 🇯🇵 756 59 851ms 12 Sep 2022 627th Steffan153 🇫🇮 756 64 1,221ms 4 Jan 2023 627th Shanethegamer 🇺🇸 756 64 1,299ms 29 Mar 2023 629th o0lit3 🇺🇸 754 51 5ms 12 Apr 2021 630th dokutan 754 94 52ms 14 Apr 2024 631st bbkr 753 49 87ms 14 Nov 2018 631st itiievskyi 🇺🇦 753 49 109ms 11 Aug 2020 633rd anter69 🇭🇺 752 53 41ms 8 Feb 2023 633rd fuzzylojik-golf 🇺🇸 752 53 40ms 6 Jul 2025 635th ffelixm 752 75 103ms 12 Jun 2025 636th Lifesorder 751 72 13ms 12 Oct 2018 636th nwellnhof 🇩🇪 751 72 9ms 4 Feb 2021 636th annaproxy 751 72 9ms 28 Dec 2021 636th yzhs 🇩🇪 751 72 10ms 20 Jul 2022 636th fourth-bit 751 72 10ms 2 Jul 2023 636th bizy-coder 751 72 9ms 14 Aug 2024 642nd scpchicken 🇵🇼 751 88 155ms 21 Feb 2023 643rd sean-niemann 🇺🇸 751 105 21ms 9 days ago 644th ETHproductions 🇺🇸 750 75 30ms 21 Dec 2018 644th elisherer 🇮🇱 750 75 9ms 8 Apr 2019 644th emgordon154 750 75 9ms 13 Dec 2021 644th nwellnhof 🇩🇪 750 75 9ms 26 Jun 2023 648th emplv 🇱🇻 749 76 4ms 11 May 2021 648th sisyphus-ppcg 🇦🇺 749 76 4ms 14 Jul 2022 650th HPWiz 🇳🇿 748 67 417ms 16 Jan 2024 651st GrayJoKing 🇦🇺 748 86 415ms 5 Mar 2022 651st fuzzylojik-golf 🇺🇸 748 86 433ms 30 Aug 2025 653rd Irratix 🇳🇱 747 45 3ms 1 Nov 2020 653rd GrayJoKing 🇦🇺 747 45 3ms 1 Nov 2020 653rd primo-ppcg 🇹🇭 747 45 2ms 2 Nov 2020 653rd KatieLG 🇬🇧 747 45 2ms 6 Dec 2020 653rd sisyphus-ppcg 🇦🇺 747 45 2ms 11 Mar 2022 653rd msbranicky 747 45 3ms 27 Jul 2023 653rd adamnielson42 🇺🇸 747 45 2ms 8 Nov 2023 653rd dokutan 747 45 2ms 11 Nov 2023 661st wiz0u 746 75 359ms 26 Jun 2023 661st pardouin 🇫🇷 746 75 338ms 8 Oct 2024 661st fuzzylojik-golf 🇺🇸 746 75 340ms 31 Aug 2025 664th Yewzir 🇧🇪 746 91 331ms 2 Oct 2025 665th JDiLenarda 🇫🇷 744 65 1,242ms 9 Oct 2020 666th DialFrost 🇸🇬 744 78 2ms 5 Nov 2023 667th dokutan 743 60 204ms 11 Apr 2024 668th dokutan 742 76 102ms 23 Jul 2025 669th laikoni 742 89 130ms 25 Dec 2018 670th Lydxn 🇨🇦 740 52 3ms 18 Jul 2022 670th xsot 🇸🇬 740 52 6ms 24 Jun 2025 672nd xorraxrax 740 73 9ms 26 Oct 2019 672nd btjones0 740 73 11ms 15 Jul 2022 672nd Bmrl7 740 73 10ms 26 Feb 2024 675th rambox11 740 76 9ms 27 Apr 2018 First Prev 601–675 of 3,093 Next Last