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 675th YAJUE114514 538 148 10ms 5 hours ago 677th psaban 535 149 16ms 31 Jul 2025 677th TheZwierzLF 🇵🇱 535 149 11ms 17 days ago 679th msbranicky 533 175 156ms 13 Dec 2024 680th deancureton 532 121 9ms 30 Dec 2024 681st FlorianCassayre 🇫🇷 531 150 16ms 1 Oct 2024 681st jameswmccarty 531 150 10ms 5 Oct 2024 681st yousefalizadeh 531 150 10ms 23 Oct 2024 681st feherd 531 150 10ms 31 Oct 2024 681st kadamkaustubh 531 150 9ms 8 Nov 2025 686th msbranicky 528 126 2,981ms 9 Jan 2025 687th blaztoma 🇱🇹 526 154 127ms 13 days ago 688th adamnielson42 🇺🇸 524 152 12ms 6 Oct 2024 688th voidgloom 524 152 10ms 22 Oct 2024 688th omero-san 524 152 9ms 22 Sep 2025 688th brochmann 🇸🇪 524 152 13ms 12 Oct 2025 692nd Macweese 524 178 382ms 3 Aug 2025 693rd galloj 🇨🇿 522 112 19ms 4 Oct 2024 694th TheZwierzLF 🇵🇱 522 127 436ms 13 hours ago 695th xyangst 521 153 9ms 1 Oct 2024 695th denisfouchard 521 153 10ms 21 Aug 2025 697th snoozingnewt 🇨🇦 519 213 138ms 2 Nov 2025 698th bac0id 518 180 370ms 9 Jan 2025 699th osNiko 🇧🇷 517 154 11ms 21 Aug 2025 700th sidok 515 109 247ms 13 Nov 2024 701st dokutan 514 143 128ms 19 Oct 2024 702nd robin-scragg 514 155 13ms 21 Aug 2025 702nd celiendonze 🇨🇭 514 155 11ms 17 Oct 2025 704th travisdoesmath 511 156 9ms 7 Sep 2025 704th Shotokhan 511 156 9ms 21 Sep 2025 706th nephila-nacrea 🇬🇧 510 77 3ms 2 Oct 2024 707th yoshykai 510 183 364ms 12 Apr 2025 708th KatieLG 🇬🇧 509 140 392ms 1 Oct 2024 709th KatieLG 🇬🇧 509 146 9ms 2 Oct 2024 710th dokutan 508 116 746ms 30 Aug 2025 711th Chinay-Domitrix 🇺🇸 508 131 3,327ms 30 Mar 2025 712th dokutan 507 126 138ms 22 Jun 2025 713th lhulinsky 507 157 9ms 21 Oct 2024 714th ThatAlo 504 158 10ms 9 Dec 2024 715th Andrey2001 502 132 720ms 14 days ago 716th msbranicky 501 138 3ms 3 Oct 2024 717th snoozingnewt 🇨🇦 501 142 416ms 2 Nov 2025 718th webmiche 501 159 10ms 3 Nov 2025 719th jlangvand 499 141 2ms 15 Oct 2024 719th HumanoidCPU 499 141 1ms 7 Mar 2025 721st MeWhenI 🇻🇦 499 149 55ms 4 Oct 2024 722nd janAkali 🇷🇺 499 167 357ms 8 Oct 2024 723rd Mabeloid 🇳🇴 498 133 538ms 2 Oct 2024 724th CheeseCake628 🇳🇴 498 160 102ms 5 Nov 2024 725th pres-abhisheksinha 495 161 10ms 8 Oct 2024 726th CarterStroik 493 161 2ms 23 days ago 727th ibixina 492 162 9ms 13 Oct 2024 727th TheAtrossian 492 162 10ms 5 Jan 2025 729th TheRealOhead 🇺🇸 491 131 9ms 1 Oct 2024 730th HumanoidCPU 491 145 394ms 5 Oct 2024 731st snoozingnewt 🇨🇦 490 150 129ms 2 Nov 2025 732nd JunkIce 487 136 490ms 3 Dec 2024 733rd snoozingnewt 🇨🇦 487 249 26ms 2 Nov 2025 734th snoozingnewt 🇨🇦 486 117 904ms 2 Nov 2025 735th h-hh-hhh 🇺🇦 486 177 56ms 2 Nov 2024 736th Vaekor 483 165 10ms 15 Dec 2024 737th snoozingnewt 🇨🇦 482 173 332ms 2 Nov 2025 738th alphafalfa 480 92 2ms 8 Nov 2024 739th h-hh-hhh 🇺🇦 478 147 2ms 2 Nov 2024 740th mitzal 478 180 58ms 9 Feb 2025 741st ravnskjaer 🇩🇰 478 195 453ms 20 Dec 2024 742nd MiffOttah 475 150 431ms 6 Oct 2024 743rd JesseNoEyes 🇺🇸 471 169 10ms 1 Oct 2024 744th luca1339 471 198 371ms 4 Nov 2024 745th Maximizer02 471 201 10ms 1 Oct 2024 746th iczelia 🇩🇪 470 94 2ms 23 Sep 2025 747th zyc-2024 🇨🇳 469 170 9ms 5 Oct 2024 748th ejini6969 468 102 32ms 14 Jun 2025 749th ComputerKWasTaken 🇺🇸 466 171 10ms 14 Oct 2024 750th snoozingnewt 🇨🇦 466 200 228ms 2 Nov 2025 First Prev 676–750 of 846 Next Last