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 721st adamnielson42 🇺🇸 524 152 10ms 6 Oct 2024 721st voidgloom 524 152 10ms 22 Oct 2024 721st omero-san 524 152 10ms 22 Sep 2025 721st brochmann 🇸🇪 524 152 10ms 12 Oct 2025 725th isaiah0311 🇺🇸 523 135 2ms 12 days ago 726th galloj 🇨🇿 522 112 19ms 4 Oct 2024 727th TheZwierzLF 🇵🇱 522 127 507ms 12 Dec 2025 728th xyangst 521 153 11ms 1 Oct 2024 728th denisfouchard 521 153 10ms 21 Aug 2025 730th snoozingnewt 🇨🇦 520 213 138ms 2 Nov 2025 731st bac0id 519 180 388ms 9 Jan 2025 732nd osNiko 🇧🇷 518 154 9ms 21 Aug 2025 733rd sidok 515 109 248ms 13 Nov 2024 734th Andrey2001 514 129 525ms 20 days ago 735th dokutan 514 143 154ms 19 Oct 2024 736th robin-scragg 514 155 11ms 21 Aug 2025 736th celiendonze 🇨🇭 514 155 10ms 17 Oct 2025 738th nephila-nacrea 🇬🇧 511 77 3ms 2 Oct 2024 739th travisdoesmath 511 156 10ms 7 Sep 2025 739th Shotokhan 511 156 10ms 21 Sep 2025 741st KatieLG 🇬🇧 510 140 436ms 1 Oct 2024 742nd yoshykai 510 183 374ms 12 Apr 2025 743rd Chinay-Domitrix 🇺🇸 509 131 2,347ms 30 Mar 2025 744th KatieLG 🇬🇧 509 146 8ms 2 Oct 2024 745th lhulinsky 508 157 10ms 21 Oct 2024 746th dokutan 507 126 143ms 22 Jun 2025 747th ThatAlo 505 158 10ms 9 Dec 2024 748th dokutan 504 114 804ms 17 hours ago 749th osNiko 🇧🇷 503 72 51ms 11 Jan 2026 750th msbranicky 503 138 3ms 3 Oct 2024 751st snoozingnewt 🇨🇦 503 142 463ms 2 Nov 2025 752nd jlangvand 501 141 1ms 15 Oct 2024 752nd HumanoidCPU 501 141 1ms 7 Mar 2025 754th webmiche 501 159 11ms 3 Nov 2025 755th blaztoma 🇱🇹 500 154 109ms 28 Nov 2025 756th Mabeloid 🇳🇴 499 133 538ms 2 Oct 2024 757th MeWhenI 🇻🇦 499 149 53ms 4 Oct 2024 758th janAkali 🇷🇺 499 167 357ms 8 Oct 2024 759th CheeseCake628 🇳🇴 498 160 104ms 5 Nov 2024 760th pres-abhisheksinha 495 161 10ms 8 Oct 2024 761st CarterStroik 493 161 2ms 19 Nov 2025 762nd HumanoidCPU 492 145 414ms 5 Oct 2024 763rd ibixina 492 162 11ms 13 Oct 2024 763rd TheAtrossian 492 162 11ms 5 Jan 2025 765th TheRealOhead 🇺🇸 491 131 11ms 1 Oct 2024 766th h-hh-hhh 🇺🇦 491 177 59ms 2 Nov 2024 767th snoozingnewt 🇨🇦 490 150 154ms 2 Nov 2025 768th JunkIce 488 136 510ms 3 Dec 2024 769th snoozingnewt 🇨🇦 487 249 26ms 2 Nov 2025 770th snoozingnewt 🇨🇦 486 117 1,338ms 2 Nov 2025 771st Vaekor 483 165 11ms 15 Dec 2024 772nd mitzal 483 180 61ms 9 Feb 2025 773rd snoozingnewt 🇨🇦 482 173 332ms 2 Nov 2025 774th h-hh-hhh 🇺🇦 480 147 1ms 2 Nov 2024 775th MiffOttah 476 150 446ms 6 Oct 2024 775th mwarvik 🇳🇴 476 150 439ms 1 Jan 2026 777th alphafalfa 472 92 2ms 8 Nov 2024 778th JesseNoEyes 🇺🇸 472 169 11ms 1 Oct 2024 779th luca1339 472 198 425ms 4 Nov 2024 780th Maximizer02 471 201 11ms 1 Oct 2024 781st ejini6969 469 102 37ms 14 Jun 2025 782nd zyc-2024 🇨🇳 469 170 10ms 5 Oct 2024 783rd jbjd 468 151 2ms 17 days ago 784th ComputerKWasTaken 🇺🇸 466 171 10ms 14 Oct 2024 785th snoozingnewt 🇨🇦 466 200 217ms 2 Nov 2025 786th snoozingnewt 🇨🇦 464 121 229ms 27 Nov 2025 787th iczelia 🇩🇪 462 94 2ms 23 Sep 2025 788th Jacob385 462 202 418ms 2 Oct 2024 789th navier-1 461 173 10ms 22 Sep 2025 790th madex 🇩🇪 460 104 37ms 2 Oct 2024 791st TheZwierzLF 🇵🇱 456 105 38ms 8 Jan 2026 792nd snoozingnewt 🇨🇦 455 149 4ms 2 Nov 2025 793rd IISResetMe 453 103 486ms 27 Nov 2025 794th clayboll99 453 176 10ms 10 Jul 2025 795th snoozingnewt 🇨🇦 452 96 2ms 2 Nov 2025 796th dokutan 451 63 3ms 26 Nov 2024 797th snoozingnewt 🇨🇦 451 176 2ms 2 Nov 2025 798th muser-logiccpu 🇺🇦 450 177 18ms 9 Aug 2025 799th OSYCh314 🇦🇺 448 178 10ms 2 Nov 2024 800th dokutan 445 109 10ms 19 Oct 2024 First Prev 721–800 of 895 Next Last