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 NFA Simulator 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 NFA Simulator 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 524th rschwa6308 🇺🇸 609 106 16ms 28 Oct 2024 524th snydej 609 106 17ms 21 Nov 2024 524th andrewjc2000 609 106 15ms 17 Jul 2025 524th travisdoesmath 609 106 16ms 7 Sep 2025 530th Seanharrs 609 117 411ms 15 Nov 2024 531st kaascevich 609 134 114ms 9 Jul 2025 532nd bac0id 609 141 381ms 10 Jan 2025 533rd daveberlin 607 106 9ms 27 Jun 2025 534th Shanethegamer 🇺🇸 606 154 145ms 3 Oct 2024 535th MeWhenI 🇻🇦 605 73 2ms 2 Oct 2024 536th albanian-laundromat 605 315 13ms 9 days ago 537th alemelis 604 93 467ms 1 Oct 2024 538th commandblockguy 🇺🇸 604 107 16ms 7 Oct 2024 538th zbreit 🇺🇸 604 107 18ms 29 Oct 2024 538th StardustGogeta 604 107 16ms 30 Oct 2024 538th ZakkkkAttackkkk 🇵🇭 604 107 15ms 8 Feb 2025 538th InigoK 🇺🇸 604 107 16ms 22 Sep 2025 543rd roguh 🇬🇹 601 117 2ms 13 Oct 2024 543rd iczelia 🇩🇪 601 117 3ms 25 Sep 2025 545th neihousaigaai 598 108 16ms 4 Oct 2024 545th StefanHabel 🇨🇦 598 108 16ms 23 Jan 2025 545th CaedenHarper 🇨🇦 598 108 16ms 22 Jul 2025 548th MeWhenI 🇻🇦 597 98 8ms 1 Oct 2024 549th dokutan 596 116 2ms 14 days ago 550th arcpolaris 593 120 347ms 28 Jan 2025 551st SirBogman 🇺🇸 591 64 122ms 11 Jul 2025 552nd bac0id 591 119 2ms 10 Jan 2025 553rd JunkIce 587 98 413ms 3 Dec 2024 553rd commandblockguy 🇺🇸 587 98 476ms 1 Sep 2025 555th cros107 🇦🇺 587 110 17ms 1 Jan 2025 555th guilhem-roy 🇫🇷 587 110 16ms 29 May 2025 557th DialFrost 🇸🇬 586 67 9ms 25 Jan 2025 558th Schmitt-Very-Cool 586 159 339ms 26 Sep 2025 559th gigaprofisi 🇺🇸 585 110 10ms 11 Aug 2025 560th dokutan 584 174 5ms 21 Feb 2025 561st Trip-kun 583 136 2ms 5 Oct 2024 562nd mousetail 🇳🇱 582 111 16ms 6 Oct 2024 563rd Mabeloid 🇳🇴 581 121 2ms 21 Oct 2025 564th michelebastione 🇮🇹 579 123 375ms 26 Aug 2025 565th MeWhenI 🇻🇦 578 111 79ms 2 Oct 2024 566th OllieBoyne 🇬🇧 577 112 25ms 17 Oct 2024 566th WillConker 577 112 10ms 22 Oct 2024 566th maxgodfrey2004 🇨🇦 577 112 9ms 4 Jan 2025 569th dokutan 576 102 754ms 30 Aug 2025 570th MeWhenI 🇻🇦 576 331 15ms 2 Oct 2024 571st CaedenHarper 🇨🇦 575 100 477ms 22 Jul 2025 572nd 823126 575 112 8ms 13 Nov 2024 572nd snoozingnewt 🇨🇦 575 112 9ms 2 Nov 2025 574th albanian-laundromat 574 77 2ms 3 Nov 2025 575th KatieLG 🇬🇧 574 99 1,081ms 1 Oct 2024 576th MeWhenI 🇻🇦 569 164 209ms 6 Oct 2024 577th blaztoma 🇱🇹 566 114 17ms 25 Sep 2025 578th CaedenHarper 🇨🇦 565 104 731ms 10 days ago 579th jipsong 🇩🇪 562 115 16ms 12 May 2025 580th aliakseikalosha 561 127 401ms 10 Oct 2024 581st rowechenzhong 557 116 9ms 17 Oct 2024 582nd madex 🇩🇪 555 116 9ms 1 Oct 2024 583rd FortuiteMan 🇫🇷 554 270 37ms 12 days ago 584th MeWhenI 🇻🇦 554 290 9ms 2 Oct 2024 585th JDiLenarda 🇫🇷 553 165 1,278ms 1 Oct 2024 586th dtbao20 🇻🇳 552 117 16ms 1 Oct 2024 586th Pyroan 552 117 16ms 22 Feb 2025 586th vgamula 🇺🇦 552 117 16ms 5 Aug 2025 586th FortuiteMan 🇫🇷 552 117 21ms 3 days ago 590th snoozingnewt 🇨🇦 552 148 114ms 14 days ago 591st edsrzf 🇳🇿 551 135 6ms 27 Feb 2025 592nd msbranicky 550 185 4ms 20 Jan 2025 593rd mousetail 🇳🇱 549 128 2ms 3 Oct 2024 594th ethanlally 549 170 330ms 15 days ago 595th gpikmddk 548 130 367ms 30 Oct 2025 596th elgan65536 547 118 10ms 2 Oct 2024 596th logvp 547 118 16ms 6 Oct 2024 596th ahmetdemirag 🇨🇾 547 118 13ms 6 Feb 2025 596th dirckvdende 547 118 15ms 10 Jul 2025 600th emgordon154 546 52 2ms 3 Nov 2024 First Prev 526–600 of 833 Next Last