The Set hole will go live in approximately 7 hours. Why not try and solve it ahead of time?
PalindromemordnilaP in all languages in bytes. Cheevos Holes Recent Holes Langs Medals Misc 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 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 Maze Medal Tally 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 Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Transpose Sentence United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Calendar Connect Four CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Hilbert Curve Mandelbrot Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion QR Encoder Quadratic Formula Scrambled Alphabetization Semiprime Numbers Set Snake Sphenic Numbers Star Wars GPT Trinomial Triangle Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir F# Factor Forth Fortran Gleam Go GolfScript 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 Erlang Fennel Groovy Harbour Hare Haxe Hush Hy iogii Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua 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 F# Factor Forth Fortran Gleam Go GolfScript 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 Erlang Fennel Groovy Harbour Hare Haxe Hush Hy iogii Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua 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 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 Maze Medal Tally 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 Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Transpose Sentence United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Apéry’s Constant Calendar Connect Four CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Hilbert Curve Mandelbrot Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion QR Encoder Quadratic Formula Scrambled Alphabetization Semiprime Numbers Set Snake Sphenic Numbers Star Wars GPT Trinomial Triangle Turtle Tutorial # Golfer Points Bytes Time 1st canissimia 🇦🇶 1,000 22 12 Sep 2024 1st primo-ppcg 🇹🇭 1,000 22 23 Jan 2025 3rd ovs-code 🇩🇪 976 26 1 Sep 2024 3rd zacjl 976 26 13 Sep 2024 5th JayXon 🇺🇸 952 80 3 Sep 2024 5th nwellnhof 🇩🇪 952 80 4 Sep 2024 5th error256 952 80 4 Sep 2024 5th canissimia 🇦🇶 952 80 12 Sep 2024 9th stackofbears 943 33 1 Sep 2024 9th ovs-code 🇩🇪 943 33 1 Sep 2024 11th 2bular 940 27 1 Sep 2024 12th btnlq 940 81 1 Sep 2024 12th bizy-coder 940 81 1 Sep 2024 12th MeWhenI 🇻🇦 940 81 1 Sep 2024 12th Natanaelel 🇸🇪 940 81 1 Sep 2024 12th pardouin 🇫🇷 940 81 1 Sep 2024 12th GrayJoKing 🇦🇺 940 81 2 Sep 2024 12th bricknellj 940 81 6 Sep 2024 12th sean-niemann 🇺🇸 940 81 21 Dec 2024 12th xnor-gate 940 81 27 days ago 12th retrohun 940 81 22 days ago 22nd JayXon 🇺🇸 938 45 2 Sep 2024 22nd nwellnhof 🇩🇪 938 45 3 Sep 2024 22nd error256 938 45 9 Sep 2024 22nd radarek 🇵🇱 938 45 10 Sep 2024 22nd canissimia 🇦🇶 938 45 12 Sep 2024 27th canissimia 🇦🇶 932 40 1 Sep 2024 27th nwellnhof 🇩🇪 932 40 1 Sep 2024 27th saito-ta 🇯🇵 932 40 3 Sep 2024 27th error256 932 40 3 Sep 2024 27th pardouin 🇫🇷 932 40 4 Sep 2024 27th sean-niemann 🇺🇸 932 40 7 Jan 2025 27th primo-ppcg 🇹🇭 932 40 23 Jan 2025 27th Natanaelel 🇸🇪 932 40 24 Jan 2025 35th nwellnhof 🇩🇪 926 76 5 Sep 2024 35th JayXon 🇺🇸 926 76 9 Sep 2024 37th emgordon154 917 24 10 Sep 2024 38th Natanaelel 🇸🇪 917 40 1 Sep 2024 38th GrayJoKing 🇦🇺 917 40 1 Sep 2024 38th nwellnhof 🇩🇪 917 40 1 Sep 2024 38th sean-niemann 🇺🇸 917 40 8 Jan 2025 42nd janlelis 917 46 11 Sep 2024 43rd helbling 🇨🇭 914 77 4 Sep 2024 44th error256 913 50 3 Sep 2024 45th pardouin 🇫🇷 913 69 1 Sep 2024 45th kg583 🇺🇸 913 69 1 Sep 2024 45th ovs-code 🇩🇪 913 69 1 Sep 2024 45th JayXon 🇺🇸 913 69 1 Sep 2024 45th bizy-coder 913 69 3 Sep 2024 50th ovs-code 🇩🇪 909 41 1 Sep 2024 50th Steffan153 🇫🇮 909 41 1 Sep 2024 50th sisyphus-ppcg 🇦🇺 909 41 2 Sep 2024 53rd canissimia 🇦🇶 908 44 1 Sep 2024 53rd saito-ta 🇯🇵 908 44 4 Sep 2024 55th zacjl 907 84 18 Sep 2024 56th Natanaelel 🇸🇪 906 28 1 Sep 2024 56th stackofbears 906 28 1 Sep 2024 56th bstrat 906 28 3 Sep 2024 56th SirBogman 🇺🇸 906 28 8 Sep 2024 60th pardouin 🇫🇷 902 78 2 Sep 2024 60th error256 902 78 4 Sep 2024 60th sean-niemann 🇺🇸 902 78 19 Dec 2024 60th rucin93 🇵🇱 902 78 31 Jan 2025 64th GrayJoKing 🇦🇺 901 54 1 Sep 2024 65th error256 899 58 3 Sep 2024 65th JayXon 🇺🇸 899 58 10 Sep 2024 67th MeWhenI 🇻🇦 898 47 1 Sep 2024 67th GrayJoKing 🇦🇺 898 47 2 Sep 2024 67th sean-niemann 🇺🇸 898 47 21 Dec 2024 67th Natanaelel 🇸🇪 898 47 24 Jan 2025 71st Seek64 🇩🇪 896 85 1 Sep 2024 71st duckyluuk 🇳🇱 896 85 25 Dec 2024 73rd pardouin 🇫🇷 895 41 7 Jan 2025 74th JayXon 🇺🇸 895 69 31 Oct 2024 75th nwellnhof 🇩🇪 894 52 1 Sep 2024 1–75 of 578 Next