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 Gray Code Decoder Gray Code Encoder 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 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 Gray Code Decoder Gray Code Encoder 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 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 561st two-bad 🇬🇧 665 97 12ms 2 Oct 2024 561st LordSir101 665 97 11ms 10 Aug 2025 563rd TaserTheFox 🇺🇸 665 120 18ms 8 Oct 2024 563rd yokasuretsu 665 120 11ms 26 Jan 2025 563rd Troon 665 120 10ms 17 Feb 2025 563rd keelimeguy 🇺🇸 665 120 19ms 14 Jun 2025 567th yeminghan2021 664 131 65ms 3 Feb 2026 568th AlephSquirrel 664 146 4ms 14 May 2025 569th snoozingnewt 🇨🇦 663 180 338ms 2 Nov 2025 570th 4hg 🇺🇸 662 59 34ms 5 Oct 2024 571st error256 661 142 171ms 31 May 2025 572nd albanian-laundromat 🇺🇸 661 291 12ms 16 days ago 573rd BREMAUCY 🇫🇷 659 121 17ms 18 Jul 2025 573rd retrohun 659 121 10ms 21 Mar 2026 575th xyangst 658 98 10ms 15 Oct 2024 575th BambooleanLogic 🇸🇪 658 98 10ms 21 Oct 2024 577th Yax42 🇫🇷 655 108 2ms 26 days ago 578th chartung17 654 122 10ms 24 Mar 2025 579th w911 653 183 327ms 7 Oct 2024 580th Babafaba 652 102 515ms 11 Nov 2025 580th flekAI 652 102 462ms 7 days ago 580th jusaka 652 102 465ms 3 days ago 583rd frankgraziano 652 128 7ms 21 Feb 2026 584th rucin93 🇵🇱 652 144 153ms 28 Oct 2024 585th DialFrost 🇸🇬 651 67 2ms 22 Dec 2024 586th msbranicky 649 123 17ms 3 Oct 2024 586th bobbysq 649 123 12ms 5 Oct 2024 586th wuzekai518 649 123 10ms 8 Oct 2024 586th denkyuu1 649 123 18ms 10 Mar 2026 586th fuzzylojik-golf 🇺🇸 649 123 17ms 23 days ago 591st scpchicken 🇵🇼 648 61 4ms 15 days ago 592nd koipondx86 646 123 2ms 8 Nov 2024 593rd CaedenHarper 🇨🇦 645 100 13ms 22 Aug 2025 593rd iczelia 🇩🇪 645 100 10ms 11 Oct 2025 593rd Yax42 🇫🇷 645 100 12ms 27 Nov 2025 596th Apataras 645 145 390ms 25 Jun 2025 597th tomh1012 644 111 529ms 8 Sep 2025 598th Jonatan6 🇩🇰 643 110 2ms 24 Oct 2024 599th NotEvenIndian 643 124 14ms 22 Oct 2024 599th ridingqwerty 🇺🇸 643 124 20ms 16 Jan 2025 599th CommandLeo 🇮🇹 643 124 11ms 5 Oct 2025 599th JOrE20 643 124 18ms 21 Feb 2026 603rd elgan65536 🇺🇸 643 146 174ms 2 Oct 2024 603rd luuumine 🇫🇷 643 146 153ms 26 Nov 2025 605th stefangimmillaro 641 73 304ms 1 Oct 2024 606th emgordon154 641 111 4ms 12 Jan 2025 607th dokutan 640 146 379ms 23 Nov 2025 608th MeWhenI 🇻🇦 638 73 7ms 3 Oct 2024 609th bnic24 638 125 18ms 3 Oct 2024 609th adoxography 638 125 10ms 22 Oct 2024 609th wh3n3v3r 🇨🇿 638 125 11ms 18 Nov 2024 609th lelbal 638 125 10ms 14 Oct 2025 613th MeWhenI 🇻🇦 635 91 1,014ms 29 Aug 2025 614th msbranicky 635 188 328ms 7 Jan 2025 615th KatieLG 🇬🇧 633 105 635ms 11 Feb 2026 616th DialFrost 🇸🇬 633 304 153ms 13 Aug 2025 617th Shanethegamer 🇺🇸 632 74 319ms 16 Oct 2024 618th XenThe 🇬🇧 632 102 9ms 7 Jul 2025 618th Florian-Mt 632 102 10ms 5 Dec 2025 620th CatsAreFluffy 628 127 17ms 30 Oct 2024 620th WillowWispy 628 127 11ms 25 May 2025 622nd not-a-pokemon 626 113 1ms 23 Jul 2025 623rd dokutan 626 127 2ms 10 Dec 2024 624th AlephSquirrel 625 40 43ms 1 Oct 2024 625th HumanoidCPU 621 107 486ms 17 Feb 2025 626th jupj 🇫🇮 621 114 2ms 20 Jul 2025 627th codereport 🇨🇦 620 63 33ms 2 Oct 2024 628th MarcMush 🇫🇷 620 91 830ms 8 Oct 2024 629th BalaM314 620 104 11ms 4 Feb 2025 629th acollett89 620 104 11ms 15 Jul 2025 631st Ripick 620 135 366ms 23 Mar 2025 632nd madex 🇩🇪 618 129 21ms 2 Oct 2024 632nd RedzGoose 🇦🇺 618 129 11ms 15 Oct 2024 632nd calebaitken 618 129 10ms 11 Apr 2025 632nd rollershutter 618 129 19ms 20 Nov 2025 636th bac0id 617 141 461ms 10 Jan 2025 637th evnu 615 147 87ms 12 Oct 2025 638th Europe2048 614 130 11ms 2 Oct 2024 638th nstearns96 🇬🇧 614 130 17ms 2 Oct 2024 638th Stockoh 🇫🇷 614 130 17ms 4 Jul 2025 First Prev 561–640 of 1,007 Next Last