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 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 Calendar 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 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 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 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 Calendar 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 676th psaban 535 149 16ms 31 Jul 2025 676th TheZwierzLF 🇵🇱 535 149 11ms 16 days ago 678th msbranicky 533 175 422ms 13 Dec 2024 679th deancureton 532 121 9ms 30 Dec 2024 680th FlorianCassayre 🇫🇷 531 150 16ms 1 Oct 2024 680th jameswmccarty 531 150 10ms 5 Oct 2024 680th yousefalizadeh 531 150 10ms 23 Oct 2024 680th feherd 531 150 10ms 31 Oct 2024 680th kadamkaustubh 531 150 9ms 8 Nov 2025 685th msbranicky 528 126 2,981ms 9 Jan 2025 686th blaztoma 🇱🇹 526 154 103ms 12 days ago 687th adamnielson42 🇺🇸 524 152 12ms 6 Oct 2024 687th voidgloom 524 152 10ms 22 Oct 2024 687th omero-san 524 152 9ms 22 Sep 2025 687th brochmann 🇸🇪 524 152 13ms 12 Oct 2025 691st Macweese 524 178 382ms 3 Aug 2025 692nd galloj 🇨🇿 522 112 19ms 4 Oct 2024 693rd xyangst 521 153 9ms 1 Oct 2024 693rd denisfouchard 521 153 10ms 21 Aug 2025 695th snoozingnewt 🇨🇦 519 213 138ms 2 Nov 2025 696th bac0id 518 180 370ms 9 Jan 2025 697th osNiko 🇧🇷 517 154 11ms 21 Aug 2025 698th sidok 515 109 247ms 13 Nov 2024 699th dokutan 514 143 128ms 19 Oct 2024 700th robin-scragg 514 155 13ms 21 Aug 2025 700th celiendonze 🇨🇭 514 155 11ms 17 Oct 2025 702nd travisdoesmath 511 156 9ms 7 Sep 2025 702nd Shotokhan 511 156 9ms 21 Sep 2025 704th nephila-nacrea 🇬🇧 510 77 3ms 2 Oct 2024 705th yoshykai 510 183 364ms 12 Apr 2025 706th KatieLG 🇬🇧 509 140 344ms 1 Oct 2024 707th KatieLG 🇬🇧 509 146 9ms 2 Oct 2024 708th dokutan 508 116 746ms 30 Aug 2025 709th Chinay-Domitrix 🇺🇸 508 131 3,327ms 30 Mar 2025 710th dokutan 507 126 138ms 22 Jun 2025 711th lhulinsky 507 157 9ms 21 Oct 2024 712th ThatAlo 504 158 10ms 9 Dec 2024 713th TheZwierzLF 🇵🇱 502 132 522ms 16 days ago 713th Andrey2001 502 132 720ms 13 days ago 715th msbranicky 501 138 3ms 3 Oct 2024 716th snoozingnewt 🇨🇦 501 142 364ms 2 Nov 2025 717th webmiche 501 159 10ms 3 Nov 2025 718th jlangvand 499 141 2ms 15 Oct 2024 718th HumanoidCPU 499 141 1ms 7 Mar 2025 720th MeWhenI 🇻🇦 499 149 55ms 4 Oct 2024 721st janAkali 🇷🇺 499 167 357ms 8 Oct 2024 722nd Mabeloid 🇳🇴 498 133 538ms 2 Oct 2024 723rd CheeseCake628 🇳🇴 498 160 102ms 5 Nov 2024 724th pres-abhisheksinha 495 161 10ms 8 Oct 2024 725th CarterStroik 493 161 2ms 22 days ago 726th ibixina 492 162 9ms 13 Oct 2024 726th TheAtrossian 492 162 10ms 5 Jan 2025 728th TheRealOhead 🇺🇸 491 131 9ms 1 Oct 2024 729th HumanoidCPU 491 145 388ms 5 Oct 2024 730th snoozingnewt 🇨🇦 490 150 129ms 2 Nov 2025 731st JunkIce 487 136 490ms 3 Dec 2024 732nd snoozingnewt 🇨🇦 487 249 26ms 2 Nov 2025 733rd snoozingnewt 🇨🇦 486 117 904ms 2 Nov 2025 734th h-hh-hhh 🇺🇦 486 177 56ms 2 Nov 2024 735th Vaekor 483 165 10ms 15 Dec 2024 736th snoozingnewt 🇨🇦 482 173 332ms 2 Nov 2025 737th alphafalfa 480 92 2ms 8 Nov 2024 738th h-hh-hhh 🇺🇦 478 147 2ms 2 Nov 2024 739th mitzal 478 180 58ms 9 Feb 2025 740th ravnskjaer 🇩🇰 478 195 453ms 20 Dec 2024 741st MiffOttah 475 150 369ms 6 Oct 2024 742nd JesseNoEyes 🇺🇸 471 169 10ms 1 Oct 2024 743rd luca1339 471 198 371ms 4 Nov 2024 744th Maximizer02 471 201 10ms 1 Oct 2024 745th iczelia 🇩🇪 470 94 2ms 23 Sep 2025 746th zyc-2024 🇨🇳 469 170 9ms 5 Oct 2024 747th ejini6969 468 102 32ms 14 Jun 2025 748th ComputerKWasTaken 🇺🇸 466 171 10ms 14 Oct 2024 749th snoozingnewt 🇨🇦 466 200 310ms 2 Nov 2025 750th snoozingnewt 🇨🇦 464 121 200ms 14 days ago First Prev 676–750 of 845 Next Last