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 560th iczelia 🇩🇪 644 100 13ms 11 Oct 2025 560th Yax42 🇫🇷 644 100 10ms 27 Nov 2025 563rd Apataras 644 145 390ms 25 Jun 2025 564th tomh1012 643 111 539ms 8 Sep 2025 565th NotEvenIndian 643 124 10ms 22 Oct 2024 565th ridingqwerty 🇺🇸 643 124 16ms 16 Jan 2025 565th CommandLeo 🇮🇹 643 124 10ms 5 Oct 2025 565th JOrE20 643 124 17ms 13 mins ago 569th Jonatan6 🇩🇰 642 110 2ms 24 Oct 2024 570th dokutan 640 146 379ms 23 Nov 2025 571st stefangimmillaro 639 73 306ms 1 Oct 2024 572nd elgan65536 🇺🇸 639 146 160ms 2 Oct 2024 572nd luuumine 🇫🇷 639 146 148ms 26 Nov 2025 574th MeWhenI 🇻🇦 638 73 8ms 3 Oct 2024 575th bnic24 638 125 16ms 3 Oct 2024 575th adoxography 638 125 11ms 22 Oct 2024 575th wh3n3v3r 🇨🇿 638 125 10ms 18 Nov 2024 575th lelbal 638 125 10ms 14 Oct 2025 579th Yax42 🇫🇷 636 111 2ms 9 Jan 2026 580th msbranicky 634 188 279ms 7 Jan 2025 581st MeWhenI 🇻🇦 632 91 994ms 29 Aug 2025 582nd KatieLG 🇬🇧 632 105 439ms 10 days ago 583rd Shanethegamer 🇺🇸 631 74 285ms 16 Oct 2024 584th XenThe 🇬🇧 631 102 10ms 7 Jul 2025 584th Florian-Mt 631 102 10ms 5 Dec 2025 586th albanian-laundromat 631 264 1,644ms 3 Nov 2025 587th CatsAreFluffy 628 127 17ms 30 Oct 2024 587th WillowWispy 628 127 11ms 25 May 2025 589th DialFrost 🇸🇬 627 304 153ms 13 Aug 2025 590th AlephSquirrel 625 40 43ms 1 Oct 2024 591st not-a-pokemon 625 113 1ms 23 Jul 2025 592nd dokutan 624 127 2ms 10 Dec 2024 593rd HumanoidCPU 620 107 502ms 17 Feb 2025 594th codereport 🇨🇦 619 63 33ms 2 Oct 2024 595th BalaM314 619 104 13ms 4 Feb 2025 595th acollett89 619 104 10ms 15 Jul 2025 597th jupj 🇫🇮 619 114 2ms 20 Jul 2025 598th madex 🇩🇪 618 129 16ms 2 Oct 2024 598th RedzGoose 🇦🇺 618 129 11ms 15 Oct 2024 598th calebaitken 618 129 10ms 11 Apr 2025 598th rollershutter 618 129 17ms 20 Nov 2025 602nd MarcMush 🇫🇷 617 91 813ms 8 Oct 2024 603rd Ripick 617 135 346ms 23 Mar 2025 604th bac0id 616 141 405ms 10 Jan 2025 605th Europe2048 613 130 10ms 2 Oct 2024 605th nstearns96 🇬🇧 613 130 17ms 2 Oct 2024 605th Stockoh 🇫🇷 613 130 17ms 4 Jul 2025 608th evnu 612 147 82ms 12 Oct 2025 609th Seanharrs 🇦🇺 610 117 471ms 15 Nov 2024 610th inverseLorentz 🇦🇺 609 131 11ms 7 Oct 2024 610th dokutan 609 131 11ms 19 Oct 2024 610th sciencejiho 609 131 17ms 11 Feb 2025 610th Jaydosu 609 131 11ms 11 Apr 2025 610th Emutis 🇱🇹 609 131 9ms 11 Nov 2025 615th kaascevich 609 134 121ms 9 Jul 2025 616th HumanoidCPU 607 106 11ms 7 Mar 2025 616th daveberlin 607 106 9ms 27 Jun 2025 618th MeWhenI 🇻🇦 607 111 88ms 2 Oct 2024 619th Shanethegamer 🇺🇸 606 154 147ms 3 Oct 2024 620th emgordon154 606 156 8ms 13 Dec 2024 621st alemelis 604 93 467ms 1 Oct 2024 622nd roguh 🇬🇹 604 117 1ms 13 Oct 2024 622nd iczelia 🇩🇪 604 117 2ms 25 Sep 2025 624th Mabeloid 🇳🇴 599 133 11ms 2 Oct 2024 625th dokutan 598 116 2ms 19 Nov 2025 626th MeWhenI 🇻🇦 597 98 7ms 1 Oct 2024 627th MeWhenI 🇻🇦 595 73 2ms 2 Oct 2024 628th arcpolaris 595 120 396ms 28 Jan 2025 629th dokutan 595 159 6ms 19 Oct 2024 630th SirBogman 🇺🇸 593 64 118ms 11 Jul 2025 631st bac0id 593 119 2ms 10 Jan 2025 632nd tatzyr 🇯🇵 590 81 37ms 23 Dec 2024 633rd RaBa21 🇭🇺 590 135 17ms 19 Jul 2025 634th DialFrost 🇸🇬 588 67 8ms 25 Jan 2025 635th Schmitt-Very-Cool 587 159 445ms 26 Sep 2025 636th dokutan 587 174 5ms 21 Feb 2025 637th sciencedjinn 586 136 10ms 8 Nov 2024 637th ihatethefrench 586 136 18ms 4 Jan 2025 637th Florian-Mt 586 136 17ms 5 Dec 2025 640th gigaprofisi 🇺🇸 585 110 11ms 11 Aug 2025 First Prev 561–640 of 895 Next Last