The Multitap Input hole will go live in approximately 13 hours. Why not try and solve it ahead of time?
PalindromemordnilaP 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 Calendar 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 Tower of Hanoi 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 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 Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers 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 ArkScript 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 ArkScript 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 Calendar 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 Tower of Hanoi 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 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 Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 641st ravnskjaer 🇩🇰 521 186 488ms 15 Dec 2025 642nd CaedenHarper 🇨🇦 516 188 493ms 3 Oct 2025 643rd error256 515 134 2ms 24 Sep 2024 644th Shanethegamer 🇺🇸 512 141 147ms 4 Dec 2025 645th rboath 506 159 109ms 18 Dec 2024 646th madex 🇩🇪 503 84 36ms 1 Sep 2024 647th snoozingnewt 🇨🇦 502 141 9ms 12 Oct 2025 648th dbut2 🇦🇺 502 261 255ms 3 Sep 2024 649th MeWhenI 🇻🇦 498 86 919ms 15 Sep 2025 650th LukeBridges 🇬🇧 498 142 10ms 3 Sep 2024 651st snoozingnewt 🇨🇦 497 160 101ms 1 Sep 2024 652nd MeWhenI 🇻🇦 497 181 2ms 13 Jun 2025 653rd HunterC14 494 155 10ms 21 Oct 2024 654th mateusz-sterczewski 491 86 36ms 15 days ago 655th madex 🇩🇪 491 183 2ms 2 Sep 2024 656th codewrite 🇬🇧 490 181 433ms 30 Dec 2025 657th Naitzirch 🇳🇱 484 158 11ms 3 Jul 2025 658th alphafalfa 480 105 4ms 1 Nov 2024 659th snoozingnewt 🇨🇦 479 185 441ms 4 Oct 2025 660th rucin93 🇵🇱 478 251 225ms 5 Sep 2024 661st snoozingnewt 🇨🇦 476 189 5ms 9 Oct 2025 662nd junkondo-jp 475 149 9ms 15 Dec 2024 663rd KatieLG 🇬🇧 475 292 7ms 1 Sep 2024 664th janAkali 🇷🇺 470 171 385ms 17 May 2025 665th DialFrost 🇸🇬 469 207 603ms 24 Sep 2025 666th R4z0rX 466 152 9ms 1 Sep 2024 667th Apzyte-Gamer 464 165 10ms 28 Oct 2024 668th iczelia 🇩🇪 463 194 2ms 11 Oct 2025 669th two-bad 🇬🇧 454 156 11ms 4 Oct 2024 670th CyberTapir 453 169 10ms 1 Sep 2024 671st snoozingnewt 🇨🇦 449 186 8ms 1 Sep 2024 672nd JOrE20 🇺🇸 448 271 26ms 25 Dec 2025 673rd msbranicky 446 269 224ms 1 Sep 2024 674th IISResetMe 439 106 391ms 27 days ago 675th Shanethegamer 🇺🇸 438 115 2ms 1 Sep 2024 676th rollershutter 435 176 10ms 18 Nov 2024 677th Yax42 🇫🇷 433 224 471ms 5 Oct 2025 678th ehulinsky 🇺🇸 432 122 3ms 3 Apr 2025 679th Yewzir 🇧🇪 428 179 10ms 1 Dec 2025 680th aksyristos 418 101 36ms 17 Nov 2024 681st amazingalek 🇳🇴 411 216 446ms 4 days ago 682nd MeWhenI 🇻🇦 411 260 72ms 13 Jun 2025 683rd Jacob385 404 240 393ms 4 Sep 2024 684th bac0id 402 266 2,538ms 10 Jan 2025 685th zakariamouhid 398 178 11ms 14 Sep 2024 686th galloj 🇨🇿 396 101 10ms 4 Sep 2024 687th varhammer 🇷🇺 382 235 8ms 20 Oct 2025 688th Yewzir 🇧🇪 370 171 602ms 1 Dec 2025 689th nemoyatpeace 368 208 11ms 14 days ago 690th Giantnoodlemonster 365 246 2ms 27 Sep 2024 691st MeWhenI 🇻🇦 363 135 7ms 26 Sep 2024 692nd Mikey-Beep 🇬🇧 354 193 14ms 13 Aug 2025 693rd AidanWalter 346 221 11ms 3 Jan 2025 694th Imsmelkov 325 298 488ms 8 days ago 695th timhaj 🇸🇮 320 239 10ms 19 Sep 2024 696th snoozingnewt 🇨🇦 307 209 136ms 1 Sep 2024 697th nephila-nacrea 🇬🇧 283 132 3ms 4 Sep 2024 698th bidger 263 369 410ms 20 Sep 2024 699th KatieLG 🇬🇧 262 459 1,383ms 15 Sep 2024 700th KatieLG 🇬🇧 261 460 205ms 15 Sep 2024 701st snoozingnewt 🇨🇦 241 444 1,110ms 6 Oct 2025 702nd KatieLG 🇬🇧 200 401 174ms 15 Sep 2024 703rd KatieLG 🇬🇧 191 398 8ms 15 Sep 2024 704th KatieLG 🇬🇧 171 768 249ms 15 Sep 2024 705th KatieLG 🇬🇧 113 466 3ms 15 Sep 2024 706th Msleizak 🇫🇷 110 424 283ms 7 Feb 2025 707th KatieLG 🇬🇧 104 937 457ms 15 Sep 2024 708th KatieLG 🇬🇧 86 1,032 463ms 15 Sep 2024 709th dokutan 64 1,663 72ms 23 Apr 2025 710th dokutan 54 1,663 2ms 23 Apr 2025 711th darrenks 0 10 71ms 19 Apr 2025 711th lyphyser 0 10 68ms 25 May 2025 713th 2bular 0 11 69ms 23 Mar 2025 713th Natanaelel 🇸🇪 0 11 81ms 25 Mar 2025 713th plcc0 0 11 72ms 5 May 2025 716th kg583 🇺🇸 0 14 204ms 12 Apr 2025 717th lyxal 🇦🇺 0 19 541ms 17 May 2025 718th plcc0 0 20 493ms 20 Mar 2025 719th namelessiw 0 21 158ms 5 Nov 2025 720th GolfingSuccess 🇬🇷 0 28 108ms 13 Aug 2025 First Prev 641–720 of 733 Next Last