Card Number Validation 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 Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions 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 Gray Code Decoder Gray Code Encoder 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 Multitap Input 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript 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 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> ALGOL 68 ArkScript 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 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily 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 Continued Fractions 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 Gray Code Decoder Gray Code Encoder 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 Multitap Input 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 641st dokutan 561 155 435ms 10 Feb 2026 642nd jgbaldwinbrown 560 123 2ms 14 Jan 2026 643rd ravnskjaer 🇩🇰 559 167 455ms 15 Dec 2025 644th rowechenzhong 557 116 17ms 17 Oct 2024 645th madex 🇩🇪 556 116 14ms 1 Oct 2024 646th CaedenHarper 🇨🇦 555 104 1,098ms 24 Nov 2025 647th Matter1024 🇮🇳 555 147 471ms 3 hours ago 648th FortuiteMan 🇫🇷 554 270 40ms 22 Nov 2025 649th MeWhenI 🇻🇦 554 290 8ms 2 Oct 2024 650th dtbao20 🇻🇳 553 117 19ms 1 Oct 2024 650th Pyroan 553 117 18ms 22 Feb 2025 650th vgamula 🇺🇦 553 117 17ms 5 Aug 2025 650th FortuiteMan 🇫🇷 553 117 18ms 1 Dec 2025 650th yujqiao 553 117 25ms 16 Dec 2025 655th snoozingnewt 🇨🇦 552 148 126ms 20 Nov 2025 656th msbranicky 552 185 4ms 20 Jan 2025 657th edsrzf 🇳🇿 551 135 6ms 27 Feb 2025 658th gpikmddk 549 130 403ms 30 Oct 2025 659th JDiLenarda 🇫🇷 549 165 1,394ms 1 Oct 2024 660th ethanlally 549 170 377ms 19 Nov 2025 660th snoozingnewt 🇨🇦 549 170 485ms 5 Dec 2025 662nd xyangst 549 171 171ms 1 Oct 2024 663rd KatieLG 🇬🇧 548 105 635ms 11 Feb 2026 664th elgan65536 🇺🇸 548 118 11ms 2 Oct 2024 664th logvp 548 118 18ms 6 Oct 2024 664th ahmetdemirag 🇨🇾 548 118 10ms 6 Feb 2025 664th dirckvdende 548 118 17ms 10 Jul 2025 664th scpchicken 🇵🇼 548 118 46ms 34 hours ago 669th zakariamouhid 546 118 10ms 1 Oct 2024 670th kmathis22 546 171 350ms 19 Nov 2025 671st najs91 545 131 383ms 15 Oct 2024 671st bac0id 545 131 422ms 9 Jan 2025 671st CaedenHarper 🇨🇦 545 131 370ms 17 Oct 2025 674th jtaxen 543 119 18ms 21 Oct 2024 674th psbpsbp 543 119 9ms 19 Dec 2024 674th klixel 🇨🇦 543 119 10ms 9 Apr 2025 674th vhoulbreque 🇫🇷 543 119 16ms 21 Nov 2025 678th eranws 542 119 10ms 23 Dec 2024 678th ComradeSquirrel 542 119 21ms 11 days ago 680th TaserTheFox 🇺🇸 539 120 18ms 8 Oct 2024 680th yokasuretsu 539 120 11ms 26 Jan 2025 680th Troon 539 120 10ms 17 Feb 2025 683rd Sciman101 539 147 2ms 26 Mar 2025 684th mousetail 🇳🇱 538 128 2ms 3 Oct 2024 685th msbranicky 536 175 156ms 13 Dec 2024 686th BREMAUCY 🇫🇷 534 121 17ms 18 Jul 2025 686th retrohun 534 121 10ms 19 days ago 688th JRaspass 🇬🇧 533 74 3ms 16 days ago 689th deancureton 533 121 10ms 30 Dec 2024 690th chartung17 530 122 10ms 24 Mar 2025 691st msbranicky 530 126 2,349ms 9 Jan 2025 692nd Protothor 528 122 11ms 10 Mar 2026 693rd msbranicky 526 123 17ms 3 Oct 2024 693rd bobbysq 526 123 12ms 5 Oct 2024 693rd wuzekai518 526 123 10ms 8 Oct 2024 693rd denkyuu1 526 123 18ms 10 Mar 2026 693rd fuzzylojik-golf 🇺🇸 526 123 17ms 13 days ago 698th dokutan 526 131 2ms 10 Feb 2026 699th Macweese 525 178 405ms 3 Aug 2025 700th galloj 🇨🇿 522 112 19ms 4 Oct 2024 701st denkyuu1 521 108 299ms 2 days ago 702nd NotEvenIndian 521 124 14ms 22 Oct 2024 702nd ridingqwerty 🇺🇸 521 124 20ms 16 Jan 2025 702nd CommandLeo 🇮🇹 521 124 11ms 5 Oct 2025 705th snoozingnewt 🇨🇦 520 213 138ms 2 Nov 2025 706th bac0id 519 180 388ms 9 Jan 2025 707th bnic24 517 125 18ms 3 Oct 2024 707th adoxography 517 125 10ms 22 Oct 2024 707th lelbal 517 125 10ms 14 Oct 2025 710th sidok 516 109 248ms 13 Nov 2024 711th dokutan 514 143 210ms 19 Oct 2024 712th nephila-nacrea 🇬🇧 513 77 4ms 2 Oct 2024 713th emgordon154 511 156 8ms 13 Dec 2024 714th isaiah0311 🇺🇸 510 135 2ms 9 Feb 2026 715th KatieLG 🇬🇧 510 140 361ms 1 Oct 2024 716th yoshykai 510 183 374ms 12 Apr 2025 717th CatsAreFluffy 509 127 17ms 30 Oct 2024 717th WillowWispy 509 127 11ms 25 May 2025 719th Chinay-Domitrix 🇺🇸 509 131 2,397ms 30 Mar 2025 720th KatieLG 🇬🇧 509 146 9ms 2 Oct 2024 First Prev 641–720 of 929 Next Last