The Tower of Hanoi hole will go live in approximately 2 days. Why not try and solve it ahead of time?
Jacobi Symbol 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 451st martinnorling 🇸🇪 566 124 10ms 13 May 2022 452nd coreynash 566 146 10ms 19 Oct 2023 452nd alexsave 566 146 10ms 13 days ago 454th MeWhenI 🇻🇦 566 307 67ms 23 Jun 2024 455th alphafalfa 564 110 7ms 25 Oct 2024 456th Schmitt-Very-Cool 563 252 345ms 30 Sep 2025 457th emgordon154 563 376 1,681ms 17 Sep 2025 458th yzhs 🇩🇪 562 144 18ms 31 May 2022 459th Yewzir 🇧🇪 562 297 18ms 22 Dec 2024 460th GrayJoKing 🇦🇺 561 126 141ms 24 Oct 2024 460th rucin93 🇵🇱 561 126 133ms 3 Jan 2025 462nd SirBogman 🇺🇸 561 135 825ms 16 Jan 2024 463rd bac0id 561 223 334ms 29 Jun 2024 464th the-zammers 560 222 141ms 15 Oct 2023 465th DialFrost 🇸🇬 558 143 230ms 16 Jun 2024 466th bac0id 558 191 104ms 29 Jun 2024 467th emgordon154 558 220 4ms 3 Jan 2025 468th MeWhenI 🇻🇦 555 141 245ms 23 Jun 2024 469th Command-Master 554 146 16ms 29 Sep 2023 470th 386asm 🇺🇸 554 214 45ms 4 May 2023 471st SirBogman 🇺🇸 553 86 34ms 9 Jan 2023 472nd tatzyr 🇯🇵 553 94 38ms 24 Nov 2024 473rd MeWhenI 🇻🇦 552 157 29ms 23 Jun 2024 474th Shanethegamer 🇺🇸 552 283 199ms 11 May 2022 475th lifthrasiir 🇰🇷 551 85 3ms 27 Nov 2024 476th bricknellj 550 147 11ms 24 Jun 2024 477th madeforlosers 548 151 9ms 23 Oct 2024 478th jacobly0 🇺🇸 548 192 5ms 13 Sep 2023 479th retrohun 547 148 11ms 21 May 2022 479th argusdusty 🇺🇸 547 148 16ms 21 Aug 2022 481st bac0id 545 260 308ms 29 Jun 2024 482nd MeWhenI 🇻🇦 544 218 50ms 23 Jun 2024 483rd levikeck 543 229 162ms 5 Feb 2024 484th DialFrost 🇸🇬 541 96 46ms 5 Jan 2023 484th olivermrose 🇺🇸 541 96 40ms 21 Jan 2023 484th olleicua 🇺🇸 541 96 37ms 15 Feb 2025 487th MeWhenI 🇻🇦 541 117 9ms 23 Jun 2024 488th weliveinhell 🇭🇹 540 199 2ms 21 May 2024 489th MeWhenI 🇻🇦 539 115 3ms 11 Nov 2022 490th stefangimmillaro 539 150 10ms 19 Sep 2023 490th stertooy 🇧🇪 539 150 29ms 15 Jun 2024 490th InigoK 🇺🇸 539 150 19ms 25 Aug 2025 490th blaztoma 🇱🇹 539 150 11ms 11 Oct 2025 494th KatieLG 🇬🇧 539 232 332ms 13 Oct 2024 495th Bubbler-4 538 87 17ms 9 May 2022 496th dokutan 538 219 265ms 24 Mar 2025 497th MeWhenI 🇻🇦 537 141 821ms 24 May 2024 498th sisyphus-ppcg 🇦🇺 536 97 40ms 27 Dec 2023 499th Yewzir 🇧🇪 536 191 2ms 7 May 2024 500th Alessandro-Balconi 🇮🇹 534 183 106ms 15 May 2023 501st brimstonetrader 534 233 170ms 20 Mar 2024 502nd NewDefectus 🇮🇱 532 152 10ms 10 May 2022 502nd TaserTheFox 🇺🇸 532 152 17ms 26 May 2023 504th janbehrens 🇩🇪 529 153 29ms 17 Jun 2023 505th HumanoidCPU 529 248 325ms 8 Aug 2024 506th helbling 🇨🇭 527 157 13ms 3 Oct 2024 507th qpwoeirut 525 154 10ms 2 Oct 2025 507th CaedenHarper 🇨🇦 525 154 32ms 21 days ago 509th emgordon154 524 205 2ms 28 Dec 2024 510th janbehrens 🇩🇪 522 126 3ms 22 May 2022 511th CaedenHarper 🇨🇦 522 145 443ms 21 days ago 512th YAJUE114514 522 155 10ms 15 Aug 2025 513th emgordon154 521 71 60ms 22 Apr 2025 514th error256 521 215 80ms 21 May 2025 515th yzhs 🇩🇪 519 241 350ms 5 Jun 2022 516th The3gs 519 301 183ms 28 Nov 2024 517th Yewzir 🇧🇪 517 208 2ms 10 Jun 2024 518th alemelis 515 152 264ms 22 Sep 2024 519th CedricGebistorf 515 157 10ms 5 May 2023 520th msbranicky 515 199 2ms 13 Oct 2023 521st Just4FunCoder 512 158 16ms 26 Mar 2023 522nd msbranicky 511 304 3ms 12 Aug 2023 523rd guilhem-roy 🇫🇷 509 159 17ms 9 May 2022 523rd OllieBoyne 🇬🇧 509 159 10ms 13 May 2022 523rd TobyBoyne 🇬🇧 509 159 11ms 13 May 2022 First Prev 451–525 of 688 Next Last