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 Dragon Curve 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 Dragon Curve 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 GolfingSuccess 🇬🇷 668 174 38ms 25 Mar 2026 562nd dbut2 🇦🇺 667 179 327ms 31 Oct 2024 563rd two-bad 🇬🇧 665 97 15ms 2 Oct 2024 563rd LordSir101 665 97 10ms 10 Aug 2025 565th TaserTheFox 🇺🇸 665 120 18ms 8 Oct 2024 565th yokasuretsu 665 120 11ms 26 Jan 2025 565th Troon 665 120 10ms 17 Feb 2025 565th keelimeguy 🇺🇸 665 120 19ms 14 Jun 2025 569th yeminghan2021 664 131 65ms 3 Feb 2026 570th AlephSquirrel 664 146 4ms 14 May 2025 571st snoozingnewt 🇨🇦 663 180 338ms 2 Nov 2025 572nd 4hg 🇺🇸 662 59 34ms 5 Oct 2024 573rd error256 661 142 171ms 31 May 2025 574th albanian-laundromat 🇺🇸 661 291 12ms 21 days ago 575th BREMAUCY 🇫🇷 659 121 17ms 18 Jul 2025 575th retrohun 659 121 10ms 21 Mar 2026 577th xyangst 658 98 13ms 15 Oct 2024 577th BambooleanLogic 🇸🇪 658 98 12ms 21 Oct 2024 579th denkyuu1 657 73 39ms 4 days ago 580th prestosilver 🇺🇸 656 128 415ms 47 hours ago 581st Yax42 🇫🇷 655 108 2ms 24 Mar 2026 582nd chartung17 654 122 10ms 24 Mar 2025 583rd w911 653 183 327ms 7 Oct 2024 584th frankgraziano 652 128 7ms 21 Feb 2026 585th rucin93 🇵🇱 652 144 153ms 28 Oct 2024 586th DialFrost 🇸🇬 651 67 2ms 22 Dec 2024 587th Babafaba 651 102 515ms 11 Nov 2025 587th jusaka 651 102 465ms 9 days ago 589th msbranicky 649 123 17ms 3 Oct 2024 589th bobbysq 649 123 12ms 5 Oct 2024 589th wuzekai518 649 123 10ms 8 Oct 2024 589th denkyuu1 649 123 16ms 10 Mar 2026 589th fuzzylojik-golf 🇺🇸 649 123 17ms 27 Mar 2026 594th scpchicken 🇵🇼 648 61 4ms 20 days ago 595th koipondx86 646 123 2ms 8 Nov 2024 596th CaedenHarper 🇨🇦 645 100 10ms 22 Aug 2025 596th iczelia 🇩🇪 645 100 13ms 11 Oct 2025 596th Yax42 🇫🇷 645 100 11ms 27 Nov 2025 599th Apataras 645 145 463ms 25 Jun 2025 600th Jonatan6 🇩🇰 644 110 2ms 24 Oct 2024 601st tomh1012 644 111 474ms 8 Sep 2025 602nd NotEvenIndian 643 124 14ms 22 Oct 2024 602nd ridingqwerty 🇺🇸 643 124 20ms 16 Jan 2025 602nd CommandLeo 🇮🇹 643 124 11ms 5 Oct 2025 602nd JOrE20 643 124 18ms 21 Feb 2026 606th elgan65536 🇺🇸 643 146 169ms 2 Oct 2024 606th luuumine 🇫🇷 643 146 153ms 26 Nov 2025 608th stefangimmillaro 641 73 324ms 1 Oct 2024 609th emgordon154 641 111 4ms 12 Jan 2025 610th dokutan 640 146 455ms 23 Nov 2025 611th MeWhenI 🇻🇦 638 73 7ms 3 Oct 2024 612th bnic24 638 125 18ms 3 Oct 2024 612th adoxography 638 125 10ms 22 Oct 2024 612th wh3n3v3r 🇨🇿 638 125 11ms 18 Nov 2024 612th lelbal 638 125 10ms 14 Oct 2025 616th MeWhenI 🇻🇦 635 91 1,102ms 29 Aug 2025 617th msbranicky 635 188 328ms 7 Jan 2025 618th DialFrost 🇸🇬 633 304 153ms 13 Aug 2025 619th Shanethegamer 🇺🇸 632 74 290ms 16 Oct 2024 620th XenThe 🇬🇧 632 102 11ms 7 Jul 2025 620th Florian-Mt 632 102 11ms 5 Dec 2025 622nd KatieLG 🇬🇧 632 105 635ms 11 Feb 2026 623rd CatsAreFluffy 628 127 17ms 30 Oct 2024 623rd WillowWispy 628 127 11ms 25 May 2025 625th not-a-pokemon 626 113 1ms 23 Jul 2025 626th dokutan 626 127 2ms 10 Dec 2024 627th AlephSquirrel 625 40 47ms 1 Oct 2024 628th Ripick 622 135 390ms 23 Mar 2025 629th HumanoidCPU 621 107 486ms 17 Feb 2025 630th jupj 🇫🇮 621 114 2ms 20 Jul 2025 631st codereport 🇨🇦 620 63 33ms 2 Oct 2024 632nd MarcMush 🇫🇷 620 91 830ms 8 Oct 2024 633rd BalaM314 620 104 11ms 4 Feb 2025 633rd acollett89 620 104 11ms 15 Jul 2025 635th madex 🇩🇪 618 129 21ms 2 Oct 2024 635th RedzGoose 🇦🇺 618 129 11ms 15 Oct 2024 635th calebaitken 618 129 10ms 11 Apr 2025 635th rollershutter 618 129 19ms 20 Nov 2025 639th bac0id 617 141 426ms 10 Jan 2025 640th evnu 615 147 87ms 12 Oct 2025 First Prev 561–640 of 1,012 Next Last