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 885th DialFrost 🇸🇬 659 125 2ms 5 Jan 2025 885th stefangimmillaro 659 125 2ms 14 Jul 2025 885th fuzzylojik-golf 🇺🇸 659 125 1ms 2 Sep 2025 904th emplv 🇱🇻 656 86 105ms 26 Oct 2022 905th eldritchconundrum 654 61 33ms 31 Oct 2022 905th dokutan 654 61 30ms 14 Apr 2024 907th flawr 654 101 150ms 20 Feb 2019 907th drbalan 654 101 175ms 18 Jul 2020 909th scpchicken 🇵🇼 652 59 5ms 5 Feb 2023 910th AshyIsMe 🇦🇺 651 83 61ms 16 Jul 2022 910th fkantelberg 651 83 14ms 14 Jul 2023 910th lelbal 651 83 11ms 23 Dec 2024 913th primo-ppcg 🇹🇭 651 86 316ms 21 Nov 2021 914th KasperKivimaeki 🇫🇮 650 109 56ms 8 days ago 915th orthoplex 🇨🇽 649 44 48ms 5 Oct 2020 915th MeWhenI 🇻🇦 649 44 41ms 7 Aug 2023 917th primo-ppcg 🇹🇭 648 77 14ms 11 Feb 2022 918th treeowl 648 102 141ms 27 Feb 2019 918th RussellEmerine 648 102 158ms 30 Nov 2019 920th janbehrens 🇩🇪 647 88 6ms 15 Jun 2021 921st HumanoidCPU 647 100 3ms 7 days ago 922nd TFeld00 🇩🇰 643 62 32ms 26 Jun 2019 923rd HumanoidCPU 643 84 77ms 27 May 2024 923rd JunkIce 643 84 21ms 24 Nov 2024 925th annaproxy 643 87 327ms 4 Jan 2023 926th Yewzir 🇧🇪 642 86 111ms 15 May 2023 927th Johannesd3 642 103 182ms 8 Sep 2019 927th strout 642 103 183ms 15 Aug 2022 929th emgordon154 640 83 3ms 23 Dec 2024 930th DialFrost 🇸🇬 640 106 320ms 24 Sep 2025 931st Maznek 639 88 9ms 22 Jun 2023 932nd jared-hughes 639 111 51ms 20 Jul 2022 933rd gastropner 638 103 2ms 5 Jan 2021 934th primo-ppcg 🇹🇭 638 375 1ms 19 Apr 2019 935th ssilwa 636 85 43ms 20 Jan 2018 935th 5cw 🇺🇸 636 85 12ms 20 Apr 2024 935th KasperKivimaeki 🇫🇮 636 85 10ms 12 Jul 2025 935th Matter1024 🇮🇳 636 85 10ms 11 days ago 939th jhonw 635 45 43ms 21 Sep 2023 940th achimkrause 635 104 262ms 11 Jul 2018 941st albanian-laundromat 634 65 609ms 26 Sep 2025 941st DialFrost 🇸🇬 634 65 682ms 16 days ago 943rd n1LS 633 63 34ms 22 Oct 2019 943rd orthoplex 🇨🇽 633 63 35ms 31 Mar 2022 943rd jared-hughes 633 63 34ms 12 Sep 2022 943rd ovs-code 🇩🇪 633 63 34ms 22 Feb 2025 943rd KatieLG 🇬🇧 633 63 38ms 2 Oct 2025 948th error256 633 71 6ms 3 Aug 2025 949th joseprio 632 89 15ms 10 Aug 2019 950th orthoplex 🇨🇽 631 90 2ms 4 Jul 2024 951st rak1507 🇬🇧 629 105 173ms 18 Jan 2021 952nd Sakaala 628 86 10ms 20 Apr 2019 952nd jsthope 628 86 19ms 9 Mar 2023 952nd enbyte 628 86 13ms 9 Dec 2023 952nd BrunoVisnadi 🇧🇷 628 86 10ms 30 Sep 2025 956th prplz 🇦🇺 628 381 2ms 16 Apr 2019 957th KrausRaus 🇺🇸 626 91 2,083ms 16 Mar 2021 958th AaronGarbut 626 105 2ms 30 Jul 2019 958th alexjlaberge 626 105 2ms 21 Jul 2020 960th ashtraypettingzoo 🇺🇸 625 40 2ms 5 Apr 2023 961st emgordon154 625 66 597ms 12 Sep 2025 962nd WilliamChiu 625 90 21ms 29 May 2020 963rd primo-ppcg 🇹🇭 625 153 1,577ms 15 Sep 2025 964th proton 🇩🇪 623 64 34ms 10 Jun 2020 965th dokutan 623 104 2ms 26 Feb 2025 966th aDwarfNamedUrist 623 106 181ms 18 Sep 2024 967th dokutan 623 116 40ms 14 Jun 2024 968th primo-ppcg 🇹🇭 622 109 312ms 24 Apr 2020 968th prplz 🇦🇺 622 109 309ms 6 Jul 2020 968th ScottHamper 622 109 303ms 28 May 2021 968th Lydxn 🇨🇦 622 109 299ms 12 Jul 2021 968th Steffan153 🇫🇮 622 109 310ms 9 Aug 2024 973rd SanderRuud 621 87 10ms 13 Jul 2025 973rd robin-scragg 621 87 35ms 25 Jul 2025 975th dokutan 619 85 190ms 15 Jun 2025 First Prev 901–975 of 3,092 Next Last