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 ><> 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 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 ><> 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 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 560th ridingqwerty 🇺🇸 643 124 16ms 16 Jan 2025 560th CommandLeo 🇮🇹 643 124 11ms 5 Oct 2025 563rd Jonatan6 🇩🇰 642 110 2ms 24 Oct 2024 564th dokutan 640 146 379ms 23 Nov 2025 565th stefangimmillaro 639 73 331ms 1 Oct 2024 566th elgan65536 🇺🇸 639 146 164ms 2 Oct 2024 566th luuumine 🇫🇷 639 146 148ms 26 Nov 2025 568th MeWhenI 🇻🇦 638 73 8ms 3 Oct 2024 569th bnic24 638 125 16ms 3 Oct 2024 569th adoxography 638 125 11ms 22 Oct 2024 569th wh3n3v3r 🇨🇿 638 125 13ms 18 Nov 2024 569th lelbal 638 125 10ms 14 Oct 2025 573rd Yax42 🇫🇷 636 111 2ms 9 Jan 2026 574th msbranicky 634 188 279ms 7 Jan 2025 575th MeWhenI 🇻🇦 632 91 994ms 29 Aug 2025 576th Shanethegamer 🇺🇸 631 74 287ms 16 Oct 2024 577th XenThe 🇬🇧 631 102 10ms 7 Jul 2025 577th Florian-Mt 631 102 10ms 5 Dec 2025 579th KatieLG 🇬🇧 631 105 439ms 6 days ago 580th albanian-laundromat 631 264 1,644ms 3 Nov 2025 581st CatsAreFluffy 628 127 18ms 30 Oct 2024 581st WillowWispy 628 127 11ms 25 May 2025 583rd DialFrost 🇸🇬 627 304 153ms 13 Aug 2025 584th AlephSquirrel 625 40 43ms 1 Oct 2024 585th not-a-pokemon 625 113 2ms 23 Jul 2025 586th dokutan 624 127 2ms 10 Dec 2024 587th codereport 🇨🇦 619 63 33ms 2 Oct 2024 588th BalaM314 619 104 10ms 4 Feb 2025 588th acollett89 619 104 11ms 15 Jul 2025 590th HumanoidCPU 619 107 502ms 17 Feb 2025 591st jupj 🇫🇮 619 114 2ms 20 Jul 2025 592nd madex 🇩🇪 618 129 17ms 2 Oct 2024 592nd RedzGoose 🇦🇺 618 129 11ms 15 Oct 2024 592nd calebaitken 618 129 11ms 11 Apr 2025 592nd rollershutter 618 129 17ms 20 Nov 2025 592nd JOrE20 618 129 18ms 1 Dec 2025 597th MarcMush 🇫🇷 617 91 813ms 8 Oct 2024 598th Ripick 617 135 346ms 23 Mar 2025 599th bac0id 616 141 405ms 10 Jan 2025 600th Europe2048 613 130 10ms 2 Oct 2024 600th nstearns96 🇬🇧 613 130 17ms 2 Oct 2024 600th Stockoh 🇫🇷 613 130 17ms 4 Jul 2025 603rd evnu 612 147 86ms 12 Oct 2025 604th Seanharrs 610 117 471ms 15 Nov 2024 605th inverseLorentz 🇦🇺 609 131 11ms 7 Oct 2024 605th dokutan 609 131 13ms 19 Oct 2024 605th sciencejiho 609 131 17ms 11 Feb 2025 605th Jaydosu 609 131 15ms 11 Apr 2025 605th Emutis 🇱🇹 609 131 9ms 11 Nov 2025 610th kaascevich 609 134 121ms 9 Jul 2025 611th HumanoidCPU 607 106 10ms 7 Mar 2025 611th daveberlin 607 106 10ms 27 Jun 2025 613th MeWhenI 🇻🇦 607 111 88ms 2 Oct 2024 614th Shanethegamer 🇺🇸 606 154 147ms 3 Oct 2024 615th emgordon154 606 156 8ms 13 Dec 2024 616th alemelis 604 93 467ms 1 Oct 2024 617th roguh 🇬🇹 604 117 1ms 13 Oct 2024 617th iczelia 🇩🇪 604 117 2ms 25 Sep 2025 619th Mabeloid 🇳🇴 599 133 11ms 2 Oct 2024 620th MeWhenI 🇻🇦 597 98 7ms 1 Oct 2024 621st dokutan 596 116 2ms 19 Nov 2025 622nd MeWhenI 🇻🇦 595 73 2ms 2 Oct 2024 623rd arcpolaris 595 120 396ms 28 Jan 2025 624th dokutan 595 159 7ms 19 Oct 2024 625th SirBogman 🇺🇸 593 64 118ms 11 Jul 2025 626th bac0id 593 119 2ms 10 Jan 2025 627th tatzyr 🇯🇵 590 81 37ms 23 Dec 2024 628th RaBa21 🇭🇺 590 135 17ms 19 Jul 2025 629th DialFrost 🇸🇬 588 67 8ms 25 Jan 2025 630th Schmitt-Very-Cool 587 159 445ms 26 Sep 2025 631st sciencedjinn 586 136 11ms 8 Nov 2024 631st ihatethefrench 586 136 18ms 4 Jan 2025 631st Florian-Mt 586 136 17ms 5 Dec 2025 634th gigaprofisi 🇺🇸 585 110 10ms 11 Aug 2025 635th amazingalek 🇳🇴 585 122 458ms 1 Jan 2026 636th Mabeloid 🇳🇴 584 121 1ms 21 Oct 2025 637th dokutan 584 174 5ms 21 Feb 2025 638th olleicua 🇺🇸 583 82 36ms 18 Oct 2024 639th kurkale6ka 582 137 22ms 16 Oct 2024 639th 4ndyJ 🇬🇧 582 137 12ms 14 Nov 2024 First Prev 561–640 of 890 Next Last