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 ><> ALGOL 68 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 ArkScript 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 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 ArkScript 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 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 639th Florian-Mt 586 136 17ms 5 Dec 2025 642nd gigaprofisi 🇺🇸 585 110 11ms 11 Aug 2025 643rd amazingalek 🇳🇴 585 122 458ms 1 Jan 2026 644th Mabeloid 🇳🇴 584 121 1ms 21 Oct 2025 645th olleicua 🇺🇸 583 82 35ms 18 Oct 2024 646th kurkale6ka 582 137 22ms 16 Oct 2024 646th 4ndyJ 🇬🇧 582 137 11ms 14 Nov 2024 646th Mikey-Beep 🇬🇧 582 137 17ms 6 Aug 2025 646th wobblybits 582 137 19ms 17 Aug 2025 646th Andrey2001 582 137 9ms 20 days ago 651st michelebastione 🇮🇹 580 123 418ms 26 Aug 2025 652nd emgordon154 579 49 3ms 9 Dec 2025 653rd MeWhenI 🇻🇦 576 331 15ms 2 Oct 2024 654th 823126 575 112 10ms 13 Nov 2024 654th dokutan 575 112 11ms 22 Jun 2025 654th snoozingnewt 🇨🇦 575 112 14ms 2 Nov 2025 657th KatieLG 🇬🇧 574 99 1,368ms 1 Oct 2024 658th jgbaldwinbrown 574 123 2ms 14 Jan 2026 659th scpchicken 🇵🇼 573 139 17ms 6 Oct 2024 659th tomh1012 573 139 19ms 16 Jan 2026 661st NanduBC 569 140 9ms 1 Oct 2024 661st jmerle 🇳🇱 569 140 10ms 10 Jan 2025 661st RobertHoeh 569 140 11ms 3 Mar 2025 661st smilesformiles3 569 140 17ms 12 Jun 2025 661st artem-aramma 569 140 18ms 18 Jun 2025 666th MeWhenI 🇻🇦 569 164 195ms 6 Oct 2024 667th FranklinJiaChen 565 141 10ms 2 Oct 2024 668th albanian-laundromat 564 77 2ms 3 Nov 2025 669th KatieLG 🇬🇧 563 85 35ms 12 Jan 2025 670th aliakseikalosha 562 127 456ms 10 Oct 2024 671st brimstonetrader 561 142 11ms 17 Oct 2024 671st codewrite 🇬🇧 561 142 10ms 5 May 2025 671st RobGLambert 561 142 17ms 8 Jun 2025 671st GodlyProgrammer1 561 142 18ms 22 Nov 2025 671st jbjd 561 142 11ms 17 days ago 676th dokutan 561 155 396ms 11 days ago 677th ravnskjaer 🇩🇰 559 167 455ms 15 Dec 2025 678th FortuiteMan 🇫🇷 559 272 36ms 22 Nov 2025 679th GeneralFabian 557 143 10ms 9 Dec 2024 679th CutSandstone 557 143 10ms 30 Jan 2025 679th kistlerf 🇨🇭 557 143 17ms 19 May 2025 682nd madex 🇩🇪 555 116 10ms 1 Oct 2024 683rd hiichbindermax 554 144 17ms 2 Oct 2024 683rd mathisfun271 554 144 10ms 14 Oct 2024 683rd bob-th 554 144 10ms 22 Oct 2024 686th MeWhenI 🇻🇦 554 290 8ms 2 Oct 2024 687th CaedenHarper 🇨🇦 553 104 1,139ms 24 Nov 2025 688th JDiLenarda 🇫🇷 553 165 1,573ms 1 Oct 2024 689th mousetail 🇳🇱 552 128 2ms 3 Oct 2024 690th snoozingnewt 🇨🇦 552 148 121ms 20 Nov 2025 691st msbranicky 552 185 4ms 20 Jan 2025 692nd edsrzf 🇳🇿 551 135 6ms 27 Feb 2025 693rd JunkIce 550 145 10ms 3 Dec 2024 693rd denkyuu1 550 145 17ms 10 days ago 695th gpikmddk 549 130 464ms 30 Oct 2025 696th ethanlally 549 170 377ms 19 Nov 2025 696th snoozingnewt 🇨🇦 549 170 485ms 5 Dec 2025 698th zakariamouhid 546 118 14ms 1 Oct 2024 699th croc54 546 146 10ms 15 Dec 2024 700th kmathis22 546 171 350ms 19 Nov 2025 701st najs91 545 131 420ms 15 Oct 2024 701st bac0id 545 131 446ms 9 Jan 2025 701st CaedenHarper 🇨🇦 545 131 407ms 17 Oct 2025 704th xyangst 545 171 167ms 1 Oct 2024 705th dokutan 544 122 409ms 19 Oct 2024 706th PyryL 🇫🇮 542 147 10ms 1 Mar 2025 707th eranws 541 119 10ms 23 Dec 2024 708th dokutan 539 131 2ms 11 days ago 709th Sciman101 539 147 2ms 26 Mar 2025 710th mbittner20 539 148 10ms 13 Oct 2024 710th YAJUE114514 539 148 10ms 12 Dec 2025 712th psaban 535 149 15ms 31 Jul 2025 712th TheZwierzLF 🇵🇱 535 149 11ms 24 Nov 2025 714th msbranicky 533 175 165ms 13 Dec 2024 715th deancureton 532 121 10ms 30 Dec 2024 716th FlorianCassayre 🇫🇷 531 150 18ms 1 Oct 2024 716th jameswmccarty 531 150 10ms 5 Oct 2024 716th yousefalizadeh 531 150 10ms 23 Oct 2024 716th feherd 531 150 11ms 31 Oct 2024 716th kadamkaustubh 531 150 10ms 8 Nov 2025 First Prev 641–720 of 897 Next Last