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 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 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 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 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 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 FlorianCassayre 🇫🇷 532 150 18ms 1 Oct 2024 721st jameswmccarty 532 150 10ms 5 Oct 2024 721st yousefalizadeh 532 150 10ms 23 Oct 2024 721st feherd 532 150 11ms 31 Oct 2024 721st kadamkaustubh 532 150 10ms 8 Nov 2025 726th msbranicky 530 126 2,523ms 9 Jan 2025 727th adamnielson42 🇺🇸 525 152 10ms 6 Oct 2024 727th voidgloom 525 152 10ms 22 Oct 2024 727th omero-san 525 152 10ms 22 Sep 2025 727th brochmann 🇸🇪 525 152 10ms 12 Oct 2025 731st Macweese 525 178 405ms 3 Aug 2025 732nd isaiah0311 🇺🇸 523 135 2ms 25 days ago 733rd galloj 🇨🇿 522 112 19ms 4 Oct 2024 734th TheZwierzLF 🇵🇱 522 127 507ms 12 Dec 2025 735th xyangst 521 153 11ms 1 Oct 2024 735th denisfouchard 521 153 10ms 21 Aug 2025 737th snoozingnewt 🇨🇦 520 213 138ms 2 Nov 2025 738th bac0id 519 180 388ms 9 Jan 2025 739th osNiko 🇧🇷 518 154 9ms 21 Aug 2025 740th sidok 515 109 248ms 13 Nov 2024 741st Andrey2001 514 129 525ms 1 Feb 2026 742nd dokutan 514 143 154ms 19 Oct 2024 743rd robin-scragg 514 155 11ms 21 Aug 2025 743rd celiendonze 🇨🇭 514 155 10ms 17 Oct 2025 745th nephila-nacrea 🇬🇧 511 77 3ms 2 Oct 2024 746th travisdoesmath 511 156 10ms 7 Sep 2025 746th Shotokhan 511 156 10ms 21 Sep 2025 748th KatieLG 🇬🇧 510 140 436ms 1 Oct 2024 749th yoshykai 510 183 374ms 12 Apr 2025 750th Chinay-Domitrix 🇺🇸 509 131 2,347ms 30 Mar 2025 751st KatieLG 🇬🇧 509 146 8ms 2 Oct 2024 752nd lhulinsky 508 157 10ms 21 Oct 2024 753rd dokutan 507 126 145ms 22 Jun 2025 754th dokutan 506 114 804ms 13 days ago 755th ThatAlo 505 158 10ms 9 Dec 2024 756th osNiko 🇧🇷 503 72 51ms 11 Jan 2026 757th msbranicky 503 138 3ms 3 Oct 2024 758th snoozingnewt 🇨🇦 503 142 463ms 2 Nov 2025 759th jlangvand 501 141 1ms 15 Oct 2024 759th HumanoidCPU 501 141 1ms 7 Mar 2025 761st webmiche 501 159 11ms 3 Nov 2025 762nd blaztoma 🇱🇹 500 154 108ms 28 Nov 2025 763rd Mabeloid 🇳🇴 499 133 538ms 2 Oct 2024 764th MeWhenI 🇻🇦 499 149 53ms 4 Oct 2024 765th janAkali 🇷🇺 499 167 367ms 8 Oct 2024 766th CheeseCake628 🇳🇴 498 160 104ms 5 Nov 2024 767th pres-abhisheksinha 495 161 10ms 8 Oct 2024 768th CarterStroik 493 161 2ms 19 Nov 2025 769th TheRealOhead 🇺🇸 492 131 10ms 1 Oct 2024 770th HumanoidCPU 492 145 414ms 5 Oct 2024 771st ibixina 492 162 11ms 13 Oct 2024 771st TheAtrossian 492 162 11ms 5 Jan 2025 773rd h-hh-hhh 🇺🇦 491 177 56ms 2 Nov 2024 774th snoozingnewt 🇨🇦 490 150 154ms 2 Nov 2025 775th JunkIce 488 136 510ms 3 Dec 2024 776th snoozingnewt 🇨🇦 487 249 26ms 2 Nov 2025 777th snoozingnewt 🇨🇦 486 117 1,338ms 2 Nov 2025 778th Vaekor 483 165 11ms 15 Dec 2024 779th mitzal 483 180 59ms 9 Feb 2025 780th snoozingnewt 🇨🇦 482 173 377ms 2 Nov 2025 781st h-hh-hhh 🇺🇦 480 147 1ms 2 Nov 2024 782nd MiffOttah 476 150 446ms 6 Oct 2024 782nd mwarvik 🇳🇴 476 150 439ms 1 Jan 2026 784th alphafalfa 472 92 2ms 8 Nov 2024 785th JesseNoEyes 🇺🇸 472 169 11ms 1 Oct 2024 786th luca1339 472 198 425ms 4 Nov 2024 787th Maximizer02 471 201 11ms 1 Oct 2024 788th ejini6969 469 102 37ms 14 Jun 2025 789th zyc-2024 🇨🇳 469 170 10ms 5 Oct 2024 790th jbjd 468 151 2ms 4 Feb 2026 791st ComputerKWasTaken 🇺🇸 466 171 10ms 14 Oct 2024 792nd snoozingnewt 🇨🇦 466 200 260ms 2 Nov 2025 793rd snoozingnewt 🇨🇦 464 121 229ms 27 Nov 2025 794th iczelia 🇩🇪 462 94 2ms 23 Sep 2025 795th Jacob385 462 202 418ms 2 Oct 2024 796th navier-1 461 173 10ms 22 Sep 2025 797th madex 🇩🇪 460 104 37ms 2 Oct 2024 797th denkyuu1 460 104 35ms 11 days ago 799th TheZwierzLF 🇵🇱 456 105 38ms 8 Jan 2026 800th snoozingnewt 🇨🇦 455 149 4ms 2 Nov 2025 First Prev 721–800 of 904 Next Last