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 Continued Fractions 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 Gray Code Decoder Gray Code Encoder 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript 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 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 ArkScript 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 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 Continued Fractions 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 Gray Code Decoder Gray Code Encoder 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 721st kmathis22 546 171 350ms 19 Nov 2025 722nd najs91 545 131 391ms 15 Oct 2024 722nd bac0id 545 131 422ms 9 Jan 2025 722nd CaedenHarper 🇨🇦 545 131 370ms 17 Oct 2025 725th denkyuu1 544 88 35ms 6 days ago 726th PyryL 🇫🇮 543 147 10ms 1 Mar 2025 727th eranws 542 119 9ms 23 Dec 2024 727th ComradeSquirrel 542 119 10ms 3 days ago 729th dokutan 539 107 956ms 20 days ago 730th dokutan 539 131 2ms 10 Feb 2026 731st Sciman101 539 147 2ms 26 Mar 2025 732nd mbittner20 539 148 10ms 13 Oct 2024 732nd YAJUE114514 539 148 10ms 12 Dec 2025 734th msbranicky 536 175 156ms 13 Dec 2024 735th psaban 535 149 15ms 31 Jul 2025 735th TheZwierzLF 🇵🇱 535 149 11ms 24 Nov 2025 735th RodAlc24 🇪🇸 535 149 17ms 22 Feb 2026 738th JRaspass 🇬🇧 533 74 3ms 8 days ago 739th deancureton 533 121 9ms 30 Dec 2024 740th FlorianCassayre 🇫🇷 532 150 18ms 1 Oct 2024 740th jameswmccarty 532 150 10ms 5 Oct 2024 740th yousefalizadeh 532 150 10ms 23 Oct 2024 740th feherd 532 150 11ms 31 Oct 2024 740th kadamkaustubh 532 150 10ms 8 Nov 2025 745th msbranicky 530 126 2,655ms 9 Jan 2025 746th Protothor 528 122 10ms 22 days ago 747th adamnielson42 🇺🇸 525 152 10ms 6 Oct 2024 747th voidgloom 525 152 10ms 22 Oct 2024 747th omero-san 525 152 10ms 22 Sep 2025 747th brochmann 🇸🇪 525 152 10ms 12 Oct 2025 751st Macweese 525 178 405ms 3 Aug 2025 752nd isaiah0311 🇺🇸 523 135 2ms 9 Feb 2026 753rd galloj 🇨🇿 522 112 19ms 4 Oct 2024 754th TheZwierzLF 🇵🇱 522 127 507ms 12 Dec 2025 755th xyangst 521 153 11ms 1 Oct 2024 755th denisfouchard 521 153 10ms 21 Aug 2025 757th snoozingnewt 🇨🇦 520 213 138ms 2 Nov 2025 758th bac0id 519 180 388ms 9 Jan 2025 759th osNiko 🇧🇷 518 154 9ms 21 Aug 2025 760th sidok 516 109 248ms 13 Nov 2024 761st robin-scragg 515 155 11ms 21 Aug 2025 761st celiendonze 🇨🇭 515 155 10ms 17 Oct 2025 763rd Andrey2001 514 129 525ms 1 Feb 2026 764th dokutan 514 143 210ms 19 Oct 2024 765th nephila-nacrea 🇬🇧 512 77 4ms 2 Oct 2024 766th travisdoesmath 511 156 10ms 7 Sep 2025 766th Shotokhan 511 156 10ms 21 Sep 2025 768th KatieLG 🇬🇧 510 140 361ms 1 Oct 2024 769th yoshykai 510 183 374ms 12 Apr 2025 770th Chinay-Domitrix 🇺🇸 509 131 2,759ms 30 Mar 2025 771st KatieLG 🇬🇧 509 146 9ms 2 Oct 2024 772nd lhulinsky 508 157 10ms 21 Oct 2024 773rd dokutan 507 126 156ms 22 Jun 2025 774th ellis-rix 505 158 10ms 9 Dec 2024 775th osNiko 🇧🇷 503 72 51ms 11 Jan 2026 776th msbranicky 503 138 3ms 3 Oct 2024 777th snoozingnewt 🇨🇦 503 142 436ms 2 Nov 2025 778th webmiche 502 159 11ms 3 Nov 2025 779th jlangvand 501 141 1ms 15 Oct 2024 779th HumanoidCPU 501 141 1ms 7 Mar 2025 781st blaztoma 🇱🇹 500 154 119ms 28 Nov 2025 782nd Mabeloid 🇳🇴 499 133 538ms 2 Oct 2024 783rd MeWhenI 🇻🇦 499 149 56ms 4 Oct 2024 784th CheeseCake628 🇳🇴 498 160 104ms 5 Nov 2024 785th pres-abhisheksinha 495 161 10ms 8 Oct 2024 786th CarterStroik 493 161 2ms 19 Nov 2025 787th owen-c-parker 🇺🇸 492 131 10ms 1 Oct 2024 788th HumanoidCPU 492 145 480ms 5 Oct 2024 789th ibixina 492 162 11ms 13 Oct 2024 789th TheAtrossian 492 162 11ms 5 Jan 2025 791st h-hh-hhh 🇺🇦 491 177 70ms 2 Nov 2024 792nd snoozingnewt 🇨🇦 490 150 219ms 2 Nov 2025 793rd snoozingnewt 🇨🇦 490 249 26ms 2 Nov 2025 794th denkyuu1 489 115 293ms 47 hours ago 795th JunkIce 488 136 510ms 3 Dec 2024 796th snoozingnewt 🇨🇦 486 117 1,338ms 2 Nov 2025 797th Vaekor 483 165 11ms 15 Dec 2024 798th mitzal 483 180 70ms 9 Feb 2025 799th snoozingnewt 🇨🇦 482 173 377ms 2 Nov 2025 800th h-hh-hhh 🇺🇦 481 147 1ms 2 Nov 2024 First Prev 721–800 of 925 Next Last