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 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 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 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 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 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 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 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 Chars Time Submitted 526th evnu 612 147 78ms 12 Oct 2025 527th bac0id 610 141 369ms 10 Jan 2025 528th davecame 609 106 15ms 1 Oct 2024 528th starfihs 609 106 10ms 2 Oct 2024 528th rschwa6308 🇺🇸 609 106 16ms 28 Oct 2024 528th snydej 609 106 15ms 21 Nov 2024 528th andrewjc2000 609 106 15ms 17 Jul 2025 528th travisdoesmath 609 106 16ms 7 Sep 2025 534th Seanharrs 609 117 411ms 15 Nov 2024 535th kaascevich 609 134 124ms 9 Jul 2025 536th daveberlin 607 106 9ms 27 Jun 2025 537th not-a-pokemon 607 113 2ms 23 Jul 2025 538th Shanethegamer 🇺🇸 606 154 216ms 3 Oct 2024 539th MeWhenI 🇻🇦 605 73 2ms 2 Oct 2024 540th alemelis 604 93 452ms 1 Oct 2024 541st commandblockguy 🇺🇸 604 107 15ms 7 Oct 2024 541st zbreit 🇺🇸 604 107 16ms 29 Oct 2024 541st StardustGogeta 604 107 16ms 30 Oct 2024 541st ZakkkkAttackkkk 🇵🇭 604 107 16ms 8 Feb 2025 541st InigoK 🇺🇸 604 107 16ms 22 Sep 2025 546th jupj 🇫🇮 601 114 2ms 20 Jul 2025 547th neihousaigaai 598 108 16ms 4 Oct 2024 547th StefanHabel 🇨🇦 598 108 16ms 23 Jan 2025 547th CaedenHarper 🇨🇦 598 108 16ms 22 Jul 2025 550th MeWhenI 🇻🇦 597 98 7ms 1 Oct 2024 551st dokutan 596 116 2ms 21 days ago 552nd arcpolaris 593 120 347ms 28 Jan 2025 553rd SirBogman 🇺🇸 591 64 184ms 11 Jul 2025 554th JunkIce 587 98 346ms 3 Dec 2024 554th commandblockguy 🇺🇸 587 98 471ms 1 Sep 2025 556th cros107 🇦🇺 587 110 16ms 1 Jan 2025 556th guilhem-roy 🇫🇷 587 110 17ms 29 May 2025 556th Lv0Sys 🇵🇱 587 110 18ms 13 hours ago 559th DialFrost 🇸🇬 586 67 8ms 25 Jan 2025 560th roguh 🇬🇹 586 117 1ms 13 Oct 2024 560th iczelia 🇩🇪 586 117 2ms 25 Sep 2025 562nd Schmitt-Very-Cool 586 159 440ms 26 Sep 2025 563rd gigaprofisi 🇺🇸 585 110 10ms 11 Aug 2025 564th dokutan 584 174 5ms 21 Feb 2025 565th Trip-kun 583 136 2ms 5 Oct 2024 566th mousetail 🇳🇱 582 111 16ms 6 Oct 2024 567th emgordon154 579 49 3ms 30 hours ago 568th michelebastione 🇮🇹 579 123 375ms 26 Aug 2025 569th dokutan 578 102 785ms 30 Aug 2025 570th MeWhenI 🇻🇦 578 111 88ms 2 Oct 2024 571st OllieBoyne 🇬🇧 577 112 16ms 17 Oct 2024 571st WillConker 577 112 10ms 22 Oct 2024 571st maxgodfrey2004 🇨🇦 577 112 10ms 4 Jan 2025 574th bac0id 576 119 2ms 10 Jan 2025 575th MeWhenI 🇻🇦 576 331 15ms 2 Oct 2024 576th CaedenHarper 🇨🇦 575 100 454ms 22 Jul 2025 577th 823126 575 112 8ms 13 Nov 2024 577th snoozingnewt 🇨🇦 575 112 9ms 2 Nov 2025 579th albanian-laundromat 574 77 2ms 3 Nov 2025 580th KatieLG 🇬🇧 574 99 1,081ms 1 Oct 2024 581st MeWhenI 🇻🇦 569 164 285ms 6 Oct 2024 582nd CaedenHarper 🇨🇦 567 104 730ms 16 days ago 583rd blaztoma 🇱🇹 567 114 16ms 25 Sep 2025 584th Mabeloid 🇳🇴 567 121 1ms 21 Oct 2025 585th jipsong 🇩🇪 562 115 17ms 12 May 2025 586th aliakseikalosha 561 127 401ms 10 Oct 2024 587th rowechenzhong 557 116 9ms 17 Oct 2024 588th madex 🇩🇪 555 116 9ms 1 Oct 2024 589th FortuiteMan 🇫🇷 554 270 37ms 18 days ago 590th MeWhenI 🇻🇦 554 290 9ms 2 Oct 2024 591st JDiLenarda 🇫🇷 553 165 1,278ms 1 Oct 2024 592nd dtbao20 🇻🇳 552 117 16ms 1 Oct 2024 592nd Pyroan 552 117 16ms 22 Feb 2025 592nd vgamula 🇺🇦 552 117 19ms 5 Aug 2025 592nd FortuiteMan 🇫🇷 552 117 20ms 9 days ago 596th snoozingnewt 🇨🇦 552 148 124ms 20 days ago 597th edsrzf 🇳🇿 551 135 6ms 27 Feb 2025 598th msbranicky 550 185 4ms 20 Jan 2025 599th ethanlally 549 170 402ms 22 days ago 599th snoozingnewt 🇨🇦 549 170 435ms 5 days ago First Prev 526–600 of 841 Next Last