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 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 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 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 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 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 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 641st scpchicken 🇵🇼 573 139 17ms 6 Oct 2024 641st tomh1012 573 139 19ms 18 days ago 643rd NanduBC 569 140 13ms 1 Oct 2024 643rd jmerle 🇳🇱 569 140 14ms 10 Jan 2025 643rd RobertHoeh 569 140 12ms 3 Mar 2025 643rd smilesformiles3 569 140 17ms 12 Jun 2025 643rd artem-aramma 569 140 18ms 18 Jun 2025 648th MeWhenI 🇻🇦 569 164 194ms 6 Oct 2024 649th CaedenHarper 🇨🇦 567 104 1,209ms 24 Nov 2025 650th FranklinJiaChen 565 141 10ms 2 Oct 2024 651st albanian-laundromat 564 77 2ms 3 Nov 2025 652nd KatieLG 🇬🇧 562 85 36ms 12 Jan 2025 653rd aliakseikalosha 562 127 487ms 10 Oct 2024 654th brimstonetrader 561 142 11ms 17 Oct 2024 654th codewrite 🇬🇧 561 142 10ms 5 May 2025 654th RobGLambert 561 142 18ms 8 Jun 2025 654th GodlyProgrammer1 561 142 19ms 22 Nov 2025 654th jbjd 561 142 13ms 114 mins ago 659th ravnskjaer 🇩🇰 559 167 455ms 15 Dec 2025 660th FortuiteMan 🇫🇷 559 272 36ms 22 Nov 2025 661st GeneralFabian 557 143 11ms 9 Dec 2024 661st CutSandstone 557 143 10ms 30 Jan 2025 661st kistlerf 🇨🇭 557 143 19ms 19 May 2025 664th madex 🇩🇪 555 116 10ms 1 Oct 2024 665th MeWhenI 🇻🇦 554 290 9ms 2 Oct 2024 666th hiichbindermax 553 144 17ms 2 Oct 2024 666th mathisfun271 553 144 10ms 14 Oct 2024 666th bob-th 553 144 10ms 22 Oct 2024 669th JDiLenarda 🇫🇷 553 165 1,573ms 1 Oct 2024 670th KatieLG 🇬🇧 552 120 490ms 1 Oct 2024 671st snoozingnewt 🇨🇦 552 148 121ms 20 Nov 2025 672nd mousetail 🇳🇱 551 128 2ms 3 Oct 2024 673rd edsrzf 🇳🇿 551 135 6ms 27 Feb 2025 674th JunkIce 550 145 11ms 3 Dec 2024 674th Flekay 🇩🇪 550 145 10ms 10 Jul 2025 676th msbranicky 550 185 4ms 20 Jan 2025 677th gpikmddk 549 130 464ms 30 Oct 2025 678th ethanlally 549 170 377ms 19 Nov 2025 678th snoozingnewt 🇨🇦 549 170 485ms 5 Dec 2025 680th croc54 546 146 10ms 15 Dec 2024 681st kmathis22 546 171 350ms 19 Nov 2025 682nd zakariamouhid 545 118 9ms 1 Oct 2024 682nd JOrE20 545 118 9ms 1 Dec 2025 684th najs91 545 131 444ms 15 Oct 2024 684th bac0id 545 131 486ms 9 Jan 2025 684th CaedenHarper 🇨🇦 545 131 407ms 17 Oct 2025 687th xyangst 545 171 176ms 1 Oct 2024 688th dokutan 543 122 409ms 19 Oct 2024 689th PyryL 🇫🇮 542 147 10ms 1 Mar 2025 690th eranws 541 119 10ms 23 Dec 2024 691st Sciman101 538 147 2ms 26 Mar 2025 692nd mbittner20 538 148 11ms 13 Oct 2024 692nd YAJUE114514 538 148 11ms 12 Dec 2025 694th psaban 535 149 15ms 31 Jul 2025 694th TheZwierzLF 🇵🇱 535 149 11ms 24 Nov 2025 696th msbranicky 533 175 164ms 13 Dec 2024 697th deancureton 532 121 9ms 30 Dec 2024 698th FlorianCassayre 🇫🇷 531 150 18ms 1 Oct 2024 698th jameswmccarty 531 150 10ms 5 Oct 2024 698th yousefalizadeh 531 150 10ms 23 Oct 2024 698th feherd 531 150 14ms 31 Oct 2024 698th kadamkaustubh 531 150 10ms 8 Nov 2025 703rd msbranicky 530 126 3,008ms 9 Jan 2025 704th Macweese 525 178 406ms 3 Aug 2025 705th adamnielson42 🇺🇸 524 152 10ms 6 Oct 2024 705th voidgloom 524 152 11ms 22 Oct 2024 705th omero-san 524 152 12ms 22 Sep 2025 705th brochmann 🇸🇪 524 152 10ms 12 Oct 2025 709th galloj 🇨🇿 522 112 19ms 4 Oct 2024 710th TheZwierzLF 🇵🇱 522 127 507ms 12 Dec 2025 711th xyangst 521 153 11ms 1 Oct 2024 711th denisfouchard 521 153 10ms 21 Aug 2025 713th snoozingnewt 🇨🇦 520 213 138ms 2 Nov 2025 714th bac0id 519 180 388ms 9 Jan 2025 715th osNiko 🇧🇷 518 154 9ms 21 Aug 2025 716th sidok 515 109 239ms 13 Nov 2024 717th Andrey2001 514 129 525ms 2 days ago 718th dokutan 514 143 154ms 19 Oct 2024 719th robin-scragg 514 155 11ms 21 Aug 2025 719th celiendonze 🇨🇭 514 155 10ms 17 Oct 2025 First Prev 641–720 of 874 Next Last