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 559th wuzekai518 648 123 10ms 8 Oct 2024 562nd rucin93 🇵🇱 648 144 143ms 28 Oct 2024 563rd koipondx86 645 123 2ms 8 Nov 2024 564th CaedenHarper 🇨🇦 644 100 10ms 22 Aug 2025 564th iczelia 🇩🇪 644 100 13ms 11 Oct 2025 564th Yax42 🇫🇷 644 100 10ms 27 Nov 2025 567th Apataras 644 145 390ms 25 Jun 2025 568th tomh1012 643 111 539ms 8 Sep 2025 569th NotEvenIndian 643 124 10ms 22 Oct 2024 569th ridingqwerty 🇺🇸 643 124 16ms 16 Jan 2025 569th CommandLeo 🇮🇹 643 124 10ms 5 Oct 2025 569th JOrE20 643 124 17ms 24 hours ago 573rd Jonatan6 🇩🇰 642 110 2ms 24 Oct 2024 574th dokutan 640 146 379ms 23 Nov 2025 575th stefangimmillaro 639 73 306ms 1 Oct 2024 576th elgan65536 🇺🇸 639 146 160ms 2 Oct 2024 576th luuumine 🇫🇷 639 146 148ms 26 Nov 2025 578th MeWhenI 🇻🇦 638 73 8ms 3 Oct 2024 579th bnic24 638 125 16ms 3 Oct 2024 579th adoxography 638 125 11ms 22 Oct 2024 579th wh3n3v3r 🇨🇿 638 125 10ms 18 Nov 2024 579th lelbal 638 125 10ms 14 Oct 2025 583rd Yax42 🇫🇷 636 111 2ms 9 Jan 2026 584th MeWhenI 🇻🇦 634 91 994ms 29 Aug 2025 585th msbranicky 634 188 279ms 7 Jan 2025 586th KatieLG 🇬🇧 632 105 439ms 11 days ago 587th Shanethegamer 🇺🇸 631 74 285ms 16 Oct 2024 588th XenThe 🇬🇧 631 102 10ms 7 Jul 2025 588th Florian-Mt 631 102 10ms 5 Dec 2025 590th albanian-laundromat 631 264 1,644ms 3 Nov 2025 591st CatsAreFluffy 628 127 17ms 30 Oct 2024 591st WillowWispy 628 127 11ms 25 May 2025 593rd DialFrost 🇸🇬 627 304 153ms 13 Aug 2025 594th AlephSquirrel 625 40 43ms 1 Oct 2024 595th not-a-pokemon 625 113 1ms 23 Jul 2025 596th dokutan 624 127 2ms 10 Dec 2024 597th HumanoidCPU 620 107 502ms 17 Feb 2025 598th codereport 🇨🇦 619 63 33ms 2 Oct 2024 599th BalaM314 619 104 13ms 4 Feb 2025 599th acollett89 619 104 10ms 15 Jul 2025 601st jupj 🇫🇮 619 114 2ms 20 Jul 2025 602nd madex 🇩🇪 618 129 16ms 2 Oct 2024 602nd RedzGoose 🇦🇺 618 129 11ms 15 Oct 2024 602nd calebaitken 618 129 10ms 11 Apr 2025 602nd rollershutter 618 129 17ms 20 Nov 2025 606th MarcMush 🇫🇷 617 91 813ms 8 Oct 2024 607th Ripick 617 135 346ms 23 Mar 2025 608th bac0id 616 141 405ms 10 Jan 2025 609th Europe2048 613 130 10ms 2 Oct 2024 609th nstearns96 🇬🇧 613 130 17ms 2 Oct 2024 609th Stockoh 🇫🇷 613 130 17ms 4 Jul 2025 612th evnu 612 147 82ms 12 Oct 2025 613th Seanharrs 🇦🇺 610 117 471ms 15 Nov 2024 614th inverseLorentz 🇦🇺 609 131 11ms 7 Oct 2024 614th dokutan 609 131 11ms 19 Oct 2024 614th sciencejiho 609 131 17ms 11 Feb 2025 614th Jaydosu 609 131 11ms 11 Apr 2025 614th Emutis 🇱🇹 609 131 9ms 11 Nov 2025 619th kaascevich 609 134 121ms 9 Jul 2025 620th HumanoidCPU 608 106 11ms 7 Mar 2025 620th daveberlin 608 106 9ms 27 Jun 2025 622nd MeWhenI 🇻🇦 607 111 88ms 2 Oct 2024 623rd Shanethegamer 🇺🇸 606 154 147ms 3 Oct 2024 624th emgordon154 606 156 8ms 13 Dec 2024 625th alemelis 604 93 467ms 1 Oct 2024 626th roguh 🇬🇹 604 117 1ms 13 Oct 2024 626th iczelia 🇩🇪 604 117 2ms 25 Sep 2025 628th Mabeloid 🇳🇴 599 133 11ms 2 Oct 2024 629th dokutan 598 116 2ms 19 Nov 2025 630th MeWhenI 🇻🇦 597 98 7ms 1 Oct 2024 631st MeWhenI 🇻🇦 595 73 2ms 2 Oct 2024 632nd arcpolaris 595 120 396ms 28 Jan 2025 633rd dokutan 595 159 6ms 19 Oct 2024 634th SirBogman 🇺🇸 593 64 118ms 11 Jul 2025 635th bac0id 593 119 2ms 10 Jan 2025 636th RaBa21 🇭🇺 591 135 17ms 19 Jul 2025 637th tatzyr 🇯🇵 590 81 37ms 23 Dec 2024 638th DialFrost 🇸🇬 588 67 8ms 25 Jan 2025 639th Schmitt-Very-Cool 587 159 445ms 26 Sep 2025 640th dokutan 587 174 5ms 21 Feb 2025 First Prev 561–640 of 900 Next Last