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 641st NanduBC 569 140 10ms 1 Oct 2024 641st jmerle 🇳🇱 569 140 10ms 10 Jan 2025 641st RobertHoeh 569 140 9ms 3 Mar 2025 641st smilesformiles3 569 140 15ms 12 Jun 2025 641st artem-aramma 569 140 18ms 18 Jun 2025 641st Andrey2001 569 140 10ms 27 Nov 2025 647th MeWhenI 🇻🇦 569 164 181ms 6 Oct 2024 648th CaedenHarper 🇨🇦 567 104 730ms 24 Nov 2025 649th FranklinJiaChen 565 141 13ms 2 Oct 2024 650th KatieLG 🇬🇧 562 85 36ms 12 Jan 2025 651st aliakseikalosha 562 127 487ms 10 Oct 2024 652nd brimstonetrader 561 142 10ms 17 Oct 2024 652nd codewrite 🇬🇧 561 142 11ms 5 May 2025 652nd RobGLambert 561 142 16ms 8 Jun 2025 652nd GodlyProgrammer1 561 142 16ms 22 Nov 2025 656th ravnskjaer 🇩🇰 559 167 332ms 15 Dec 2025 657th FortuiteMan 🇫🇷 559 272 36ms 22 Nov 2025 658th GeneralFabian 557 143 10ms 9 Dec 2024 658th CutSandstone 557 143 9ms 30 Jan 2025 658th kistlerf 🇨🇭 557 143 18ms 19 May 2025 661st madex 🇩🇪 555 116 10ms 1 Oct 2024 662nd MeWhenI 🇻🇦 554 290 9ms 2 Oct 2024 663rd hiichbindermax 553 144 15ms 2 Oct 2024 663rd mathisfun271 553 144 9ms 14 Oct 2024 663rd bob-th 553 144 10ms 22 Oct 2024 666th JDiLenarda 🇫🇷 553 165 1,573ms 1 Oct 2024 667th KatieLG 🇬🇧 552 120 413ms 1 Oct 2024 668th snoozingnewt 🇨🇦 552 148 121ms 20 Nov 2025 669th edsrzf 🇳🇿 551 135 6ms 27 Feb 2025 670th mousetail 🇳🇱 550 128 2ms 3 Oct 2024 671st JunkIce 550 145 10ms 3 Dec 2024 671st Flekay 🇩🇪 550 145 10ms 10 Jul 2025 673rd msbranicky 550 185 4ms 20 Jan 2025 674th gpikmddk 549 130 464ms 30 Oct 2025 675th ethanlally 549 170 402ms 19 Nov 2025 675th snoozingnewt 🇨🇦 549 170 435ms 5 Dec 2025 677th croc54 546 146 12ms 15 Dec 2024 678th kmathis22 546 171 430ms 19 Nov 2025 679th zakariamouhid 545 118 9ms 1 Oct 2024 679th JOrE20 🇺🇸 545 118 9ms 1 Dec 2025 681st najs91 545 131 444ms 15 Oct 2024 681st bac0id 545 131 486ms 9 Jan 2025 681st CaedenHarper 🇨🇦 545 131 407ms 17 Oct 2025 684th xyangst 545 171 165ms 1 Oct 2024 685th dokutan 543 122 441ms 19 Oct 2024 686th PyryL 🇫🇮 542 147 10ms 1 Mar 2025 687th eranws 541 119 10ms 23 Dec 2024 688th Sciman101 538 147 2ms 26 Mar 2025 689th mbittner20 538 148 11ms 13 Oct 2024 689th YAJUE114514 538 148 10ms 12 Dec 2025 691st psaban 535 149 16ms 31 Jul 2025 691st TheZwierzLF 🇵🇱 535 149 11ms 24 Nov 2025 693rd msbranicky 533 175 156ms 13 Dec 2024 694th deancureton 532 121 9ms 30 Dec 2024 695th FlorianCassayre 🇫🇷 531 150 16ms 1 Oct 2024 695th jameswmccarty 531 150 10ms 5 Oct 2024 695th yousefalizadeh 531 150 10ms 23 Oct 2024 695th feherd 531 150 10ms 31 Oct 2024 695th kadamkaustubh 531 150 9ms 8 Nov 2025 700th msbranicky 530 126 2,193ms 9 Jan 2025 701st Macweese 525 178 382ms 3 Aug 2025 702nd adamnielson42 🇺🇸 524 152 12ms 6 Oct 2024 702nd voidgloom 524 152 10ms 22 Oct 2024 702nd omero-san 524 152 9ms 22 Sep 2025 702nd brochmann 🇸🇪 524 152 13ms 12 Oct 2025 706th galloj 🇨🇿 522 112 19ms 4 Oct 2024 707th TheZwierzLF 🇵🇱 522 127 565ms 12 Dec 2025 708th xyangst 521 153 9ms 1 Oct 2024 708th denisfouchard 521 153 10ms 21 Aug 2025 710th snoozingnewt 🇨🇦 520 213 138ms 2 Nov 2025 711th bac0id 519 180 370ms 9 Jan 2025 712th osNiko 🇧🇷 517 154 10ms 21 Aug 2025 713th sidok 515 109 239ms 13 Nov 2024 714th dokutan 514 143 154ms 19 Oct 2024 715th robin-scragg 514 155 13ms 21 Aug 2025 715th celiendonze 🇨🇭 514 155 11ms 17 Oct 2025 717th nephila-nacrea 🇬🇧 511 77 3ms 2 Oct 2024 718th travisdoesmath 511 156 9ms 7 Sep 2025 718th Shotokhan 511 156 9ms 21 Sep 2025 720th KatieLG 🇬🇧 510 140 440ms 1 Oct 2024 First Prev 641–720 of 868 Next Last