Card Number Validation 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 636th Andrey2001 569 140 10ms 27 Nov 2025 642nd MeWhenI 🇻🇦 569 164 181ms 6 Oct 2024 643rd CaedenHarper 🇨🇦 567 104 730ms 24 Nov 2025 644th FranklinJiaChen 565 141 13ms 2 Oct 2024 645th KatieLG 🇬🇧 562 85 36ms 12 Jan 2025 646th aliakseikalosha 562 127 414ms 10 Oct 2024 647th brimstonetrader 561 142 10ms 17 Oct 2024 647th codewrite 🇬🇧 561 142 11ms 5 May 2025 647th RobGLambert 561 142 16ms 8 Jun 2025 647th GodlyProgrammer1 561 142 16ms 22 Nov 2025 651st FortuiteMan 🇫🇷 559 272 38ms 22 Nov 2025 652nd ravnskjaer 🇩🇰 558 167 332ms 26 days ago 653rd GeneralFabian 557 143 10ms 9 Dec 2024 653rd CutSandstone 557 143 9ms 30 Jan 2025 653rd kistlerf 🇨🇭 557 143 18ms 19 May 2025 656th madex 🇩🇪 555 116 10ms 1 Oct 2024 657th MeWhenI 🇻🇦 554 290 9ms 2 Oct 2024 658th hiichbindermax 553 144 15ms 2 Oct 2024 658th mathisfun271 553 144 9ms 14 Oct 2024 658th bob-th 553 144 10ms 22 Oct 2024 661st JDiLenarda 🇫🇷 553 165 1,344ms 1 Oct 2024 662nd KatieLG 🇬🇧 552 120 413ms 1 Oct 2024 663rd snoozingnewt 🇨🇦 552 148 122ms 20 Nov 2025 664th edsrzf 🇳🇿 551 135 9ms 27 Feb 2025 665th mousetail 🇳🇱 550 128 2ms 3 Oct 2024 666th JunkIce 550 145 10ms 3 Dec 2024 666th Flekay 🇩🇪 550 145 10ms 10 Jul 2025 668th msbranicky 550 185 4ms 20 Jan 2025 669th gpikmddk 549 130 391ms 30 Oct 2025 670th ethanlally 549 170 402ms 19 Nov 2025 670th snoozingnewt 🇨🇦 549 170 435ms 5 Dec 2025 672nd croc54 546 146 12ms 15 Dec 2024 673rd zakariamouhid 545 118 11ms 1 Oct 2024 673rd JOrE20 🇺🇸 545 118 9ms 1 Dec 2025 675th najs91 545 131 374ms 15 Oct 2024 675th bac0id 545 131 394ms 9 Jan 2025 675th CaedenHarper 🇨🇦 545 131 361ms 17 Oct 2025 678th xyangst 545 171 165ms 1 Oct 2024 678th kmathis22 545 171 430ms 19 Nov 2025 680th dokutan 543 122 441ms 19 Oct 2024 681st PyryL 🇫🇮 542 147 10ms 1 Mar 2025 682nd eranws 541 119 10ms 23 Dec 2024 683rd Sciman101 538 147 2ms 26 Mar 2025 684th mbittner20 538 148 11ms 13 Oct 2024 684th YAJUE114514 538 148 10ms 12 Dec 2025 686th psaban 535 149 16ms 31 Jul 2025 686th TheZwierzLF 🇵🇱 535 149 11ms 24 Nov 2025 688th msbranicky 533 175 156ms 13 Dec 2024 689th deancureton 532 121 9ms 30 Dec 2024 690th FlorianCassayre 🇫🇷 531 150 16ms 1 Oct 2024 690th jameswmccarty 531 150 10ms 5 Oct 2024 690th yousefalizadeh 531 150 10ms 23 Oct 2024 690th feherd 531 150 10ms 31 Oct 2024 690th kadamkaustubh 531 150 9ms 8 Nov 2025 695th msbranicky 528 126 3,237ms 9 Jan 2025 696th adamnielson42 🇺🇸 524 152 12ms 6 Oct 2024 696th voidgloom 524 152 10ms 22 Oct 2024 696th omero-san 524 152 9ms 22 Sep 2025 696th brochmann 🇸🇪 524 152 13ms 12 Oct 2025 700th Macweese 524 178 382ms 3 Aug 2025 701st galloj 🇨🇿 522 112 19ms 4 Oct 2024 702nd TheZwierzLF 🇵🇱 522 127 565ms 12 Dec 2025 703rd xyangst 521 153 9ms 1 Oct 2024 703rd denisfouchard 521 153 10ms 21 Aug 2025 705th snoozingnewt 🇨🇦 520 213 138ms 2 Nov 2025 706th bac0id 518 180 370ms 9 Jan 2025 707th osNiko 🇧🇷 517 154 11ms 21 Aug 2025 708th sidok 515 109 239ms 13 Nov 2024 709th dokutan 514 143 155ms 19 Oct 2024 710th robin-scragg 514 155 13ms 21 Aug 2025 710th celiendonze 🇨🇭 514 155 11ms 17 Oct 2025 712th nephila-nacrea 🇬🇧 511 77 3ms 2 Oct 2024 713th travisdoesmath 511 156 9ms 7 Sep 2025 713th Shotokhan 511 156 9ms 21 Sep 2025 715th KatieLG 🇬🇧 510 140 381ms 1 Oct 2024 716th yoshykai 510 183 364ms 12 Apr 2025 717th KatieLG 🇬🇧 509 146 11ms 2 Oct 2024 718th dokutan 508 116 746ms 30 Aug 2025 719th Chinay-Domitrix 🇺🇸 508 131 4,591ms 30 Mar 2025 720th lhulinsky 508 157 9ms 21 Oct 2024 First Prev 641–720 of 858 Next Last