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 559th Troon 665 120 10ms 17 Feb 2025 559th keelimeguy 🇺🇸 665 120 19ms 14 Jun 2025 563rd yeminghan2021 663 131 65ms 3 Feb 2026 564th snoozingnewt 🇨🇦 662 180 338ms 2 Nov 2025 565th 4hg 🇺🇸 661 59 34ms 5 Oct 2024 566th error256 661 142 156ms 31 May 2025 567th BREMAUCY 🇫🇷 659 121 17ms 18 Jul 2025 567th retrohun 659 121 10ms 18 days ago 569th xyangst 658 98 11ms 15 Oct 2024 569th BambooleanLogic 🇸🇪 658 98 12ms 21 Oct 2024 571st AlephSquirrel 657 146 4ms 14 May 2025 572nd Yax42 🇫🇷 655 108 2ms 15 days ago 573rd jwhear 🇺🇸 655 197 1,696ms 1 Oct 2024 574th albanian-laundromat 🇺🇸 655 291 12ms 5 days ago 575th chartung17 654 122 10ms 24 Mar 2025 576th rucin93 🇵🇱 652 144 156ms 28 Oct 2024 577th Babafaba 651 102 515ms 11 Nov 2025 578th w911 651 183 327ms 7 Oct 2024 579th DialFrost 🇸🇬 648 67 2ms 22 Dec 2024 580th msbranicky 648 123 17ms 3 Oct 2024 580th bobbysq 648 123 12ms 5 Oct 2024 580th wuzekai518 648 123 10ms 8 Oct 2024 580th denkyuu1 648 123 18ms 10 Mar 2026 580th fuzzylojik-golf 🇺🇸 648 123 17ms 12 days ago 585th scpchicken 🇵🇼 647 61 4ms 4 days ago 586th CaedenHarper 🇨🇦 645 100 10ms 22 Aug 2025 586th iczelia 🇩🇪 645 100 10ms 11 Oct 2025 586th Yax42 🇫🇷 645 100 10ms 27 Nov 2025 589th koipondx86 645 123 2ms 8 Nov 2024 590th frankgraziano 645 128 7ms 21 Feb 2026 591st Apataras 645 145 390ms 25 Jun 2025 592nd Jonatan6 🇩🇰 643 110 2ms 24 Oct 2024 593rd tomh1012 643 111 442ms 8 Sep 2025 594th NotEvenIndian 643 124 14ms 22 Oct 2024 594th ridingqwerty 🇺🇸 643 124 20ms 16 Jan 2025 594th CommandLeo 🇮🇹 643 124 11ms 5 Oct 2025 594th JOrE20 643 124 18ms 21 Feb 2026 598th elgan65536 🇺🇸 643 146 159ms 2 Oct 2024 598th luuumine 🇫🇷 643 146 151ms 26 Nov 2025 600th dokutan 640 146 379ms 23 Nov 2025 601st stefangimmillaro 639 73 253ms 1 Oct 2024 602nd MeWhenI 🇻🇦 638 73 7ms 3 Oct 2024 603rd bnic24 638 125 18ms 3 Oct 2024 603rd adoxography 638 125 10ms 22 Oct 2024 603rd wh3n3v3r 🇨🇿 638 125 11ms 18 Nov 2024 603rd lelbal 638 125 10ms 14 Oct 2025 607th emgordon154 636 111 4ms 12 Jan 2025 608th MeWhenI 🇻🇦 634 91 1,014ms 29 Aug 2025 609th msbranicky 634 188 328ms 7 Jan 2025 610th XenThe 🇬🇧 632 102 10ms 7 Jul 2025 610th Florian-Mt 632 102 10ms 5 Dec 2025 612th KatieLG 🇬🇧 632 105 635ms 11 Feb 2026 613th Shanethegamer 🇺🇸 631 74 231ms 16 Oct 2024 614th albanian-laundromat 🇺🇸 631 264 1,435ms 3 Nov 2025 615th CatsAreFluffy 628 127 17ms 30 Oct 2024 615th WillowWispy 628 127 11ms 25 May 2025 617th DialFrost 🇸🇬 627 304 153ms 13 Aug 2025 618th not-a-pokemon 626 113 1ms 23 Jul 2025 619th AlephSquirrel 625 40 43ms 1 Oct 2024 620th dokutan 624 127 2ms 10 Dec 2024 621st HumanoidCPU 621 107 486ms 17 Feb 2025 622nd jupj 🇫🇮 621 114 2ms 20 Jul 2025 623rd BalaM314 620 104 12ms 4 Feb 2025 623rd acollett89 620 104 11ms 15 Jul 2025 625th codereport 🇨🇦 619 63 33ms 2 Oct 2024 626th MarcMush 🇫🇷 618 91 813ms 8 Oct 2024 627th madex 🇩🇪 618 129 21ms 2 Oct 2024 627th RedzGoose 🇦🇺 618 129 11ms 15 Oct 2024 627th calebaitken 618 129 10ms 11 Apr 2025 627th rollershutter 618 129 19ms 20 Nov 2025 631st Ripick 617 135 366ms 23 Mar 2025 632nd bac0id 616 141 461ms 10 Jan 2025 633rd Europe2048 614 130 11ms 2 Oct 2024 633rd nstearns96 🇬🇧 614 130 17ms 2 Oct 2024 633rd Stockoh 🇫🇷 614 130 17ms 4 Jul 2025 636th evnu 612 147 87ms 12 Oct 2025 637th Seanharrs 🇦🇺 610 117 434ms 15 Nov 2024 638th Shanethegamer 🇺🇸 610 154 148ms 3 Oct 2024 639th inverseLorentz 🇦🇺 609 131 12ms 7 Oct 2024 639th sciencejiho 609 131 24ms 11 Feb 2025 First Prev 561–640 of 935 Next Last