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 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 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 Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 721st mbittner20 539 148 10ms 13 Oct 2024 721st YAJUE114514 539 148 10ms 12 Dec 2025 723rd psaban 535 149 15ms 31 Jul 2025 723rd TheZwierzLF 🇵🇱 535 149 11ms 24 Nov 2025 723rd RodAlc24 🇪🇸 535 149 17ms 26 days ago 726th msbranicky 534 175 162ms 13 Dec 2024 727th deancureton 533 121 10ms 30 Dec 2024 728th FlorianCassayre 🇫🇷 532 150 18ms 1 Oct 2024 728th jameswmccarty 532 150 10ms 5 Oct 2024 728th yousefalizadeh 532 150 10ms 23 Oct 2024 728th feherd 532 150 11ms 31 Oct 2024 728th kadamkaustubh 532 150 10ms 8 Nov 2025 733rd msbranicky 530 126 2,655ms 9 Jan 2025 734th Protothor 528 122 17ms 10 days ago 735th adamnielson42 🇺🇸 525 152 10ms 6 Oct 2024 735th voidgloom 525 152 10ms 22 Oct 2024 735th omero-san 525 152 10ms 22 Sep 2025 735th brochmann 🇸🇪 525 152 10ms 12 Oct 2025 739th Macweese 525 178 405ms 3 Aug 2025 740th isaiah0311 🇺🇸 523 135 2ms 9 Feb 2026 741st galloj 🇨🇿 522 112 19ms 4 Oct 2024 742nd TheZwierzLF 🇵🇱 522 127 507ms 12 Dec 2025 743rd xyangst 521 153 11ms 1 Oct 2024 743rd denisfouchard 521 153 10ms 21 Aug 2025 745th snoozingnewt 🇨🇦 520 213 138ms 2 Nov 2025 746th bac0id 519 180 388ms 9 Jan 2025 747th osNiko 🇧🇷 518 154 9ms 21 Aug 2025 748th sidok 516 109 248ms 13 Nov 2024 749th Andrey2001 514 129 525ms 1 Feb 2026 750th dokutan 514 143 210ms 19 Oct 2024 751st robin-scragg 514 155 11ms 21 Aug 2025 751st celiendonze 🇨🇭 514 155 10ms 17 Oct 2025 751st aksyristos 514 155 10ms 10 days ago 754th nephila-nacrea 🇬🇧 511 77 3ms 2 Oct 2024 755th travisdoesmath 511 156 10ms 7 Sep 2025 755th Shotokhan 511 156 10ms 21 Sep 2025 757th KatieLG 🇬🇧 510 140 361ms 1 Oct 2024 758th yoshykai 510 183 374ms 12 Apr 2025 759th Chinay-Domitrix 🇺🇸 509 131 2,759ms 30 Mar 2025 760th KatieLG 🇬🇧 509 146 9ms 2 Oct 2024 761st lhulinsky 508 157 10ms 21 Oct 2024 762nd dokutan 507 126 156ms 22 Jun 2025 763rd ellis-rix 505 158 10ms 9 Dec 2024 764th osNiko 🇧🇷 503 72 51ms 11 Jan 2026 765th msbranicky 503 138 3ms 3 Oct 2024 766th snoozingnewt 🇨🇦 503 142 436ms 2 Nov 2025 767th jlangvand 501 141 1ms 15 Oct 2024 767th HumanoidCPU 501 141 1ms 7 Mar 2025 769th webmiche 501 159 11ms 3 Nov 2025 770th blaztoma 🇱🇹 500 154 119ms 28 Nov 2025 771st Mabeloid 🇳🇴 499 133 538ms 2 Oct 2024 772nd MeWhenI 🇻🇦 499 149 56ms 4 Oct 2024 773rd CheeseCake628 🇳🇴 498 160 104ms 5 Nov 2024 774th pres-abhisheksinha 495 161 10ms 8 Oct 2024 775th denkyuu1 493 97 37ms 10 days ago 776th CarterStroik 493 161 2ms 19 Nov 2025 777th TheRealOhead 🇺🇸 492 131 16ms 1 Oct 2024 778th HumanoidCPU 492 145 480ms 5 Oct 2024 779th ibixina 492 162 11ms 13 Oct 2024 779th TheAtrossian 492 162 11ms 5 Jan 2025 781st h-hh-hhh 🇺🇦 491 177 64ms 2 Nov 2024 782nd snoozingnewt 🇨🇦 491 249 26ms 2 Nov 2025 783rd snoozingnewt 🇨🇦 490 150 219ms 2 Nov 2025 784th JunkIce 488 136 510ms 3 Dec 2024 785th snoozingnewt 🇨🇦 486 117 1,338ms 2 Nov 2025 786th Vaekor 483 165 11ms 15 Dec 2024 787th mitzal 483 180 59ms 9 Feb 2025 788th snoozingnewt 🇨🇦 482 173 377ms 2 Nov 2025 789th h-hh-hhh 🇺🇦 480 147 1ms 2 Nov 2024 790th MiffOttah 476 150 478ms 6 Oct 2024 790th mwarvik 🇳🇴 476 150 431ms 1 Jan 2026 792nd alphafalfa 472 92 2ms 8 Nov 2024 793rd JesseNoEyes 🇺🇸 472 169 11ms 1 Oct 2024 794th luca1339 472 198 425ms 4 Nov 2024 795th Maximizer02 471 201 12ms 1 Oct 2024 796th ejini6969 469 102 39ms 14 Jun 2025 797th zyc-2024 🇨🇳 469 170 10ms 5 Oct 2024 798th jbjd 468 151 2ms 4 Feb 2026 799th snoozingnewt 🇨🇦 467 200 240ms 2 Nov 2025 800th ComputerKWasTaken 🇺🇸 466 171 10ms 14 Oct 2024 First Prev 721–800 of 911 Next Last