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 721st edsrzf 🇳🇿 551 135 6ms 27 Feb 2025 722nd gpikmddk 550 130 403ms 30 Oct 2025 723rd JunkIce 550 145 10ms 3 Dec 2024 724th JDiLenarda 🇫🇷 549 165 1,394ms 1 Oct 2024 725th ethanlally 549 170 377ms 19 Nov 2025 725th snoozingnewt 🇨🇦 549 170 485ms 5 Dec 2025 727th Matter1024 🇮🇳 548 149 437ms 23 days ago 728th xyangst 548 171 171ms 1 Oct 2024 729th zakariamouhid 546 118 10ms 1 Oct 2024 730th croc54 546 146 11ms 15 Dec 2024 731st kmathis22 546 171 350ms 19 Nov 2025 732nd najs91 545 131 383ms 15 Oct 2024 732nd bac0id 545 131 422ms 9 Jan 2025 732nd CaedenHarper 🇨🇦 545 131 370ms 17 Oct 2025 735th PyryL 🇫🇮 543 147 11ms 1 Mar 2025 736th eranws 542 119 10ms 23 Dec 2024 736th ComradeSquirrel 542 119 21ms 15 days ago 738th dokutan 540 131 2ms 10 Feb 2026 739th dokutan 539 107 953ms 12 Mar 2026 740th Sciman101 539 147 2ms 26 Mar 2025 741st mbittner20 539 148 10ms 13 Oct 2024 741st YAJUE114514 539 148 10ms 12 Dec 2025 743rd msbranicky 536 175 156ms 13 Dec 2024 744th psaban 535 149 18ms 31 Jul 2025 744th TheZwierzLF 🇵🇱 535 149 11ms 24 Nov 2025 744th RodAlc24 🇪🇸 535 149 18ms 22 Feb 2026 747th JRaspass 🇬🇧 533 74 3ms 21 days ago 748th deancureton 533 121 10ms 30 Dec 2024 749th FlorianCassayre 🇫🇷 532 150 18ms 1 Oct 2024 749th jameswmccarty 532 150 11ms 5 Oct 2024 749th yousefalizadeh 532 150 11ms 23 Oct 2024 749th feherd 532 150 10ms 31 Oct 2024 749th kadamkaustubh 532 150 11ms 8 Nov 2025 754th msbranicky 530 126 2,349ms 9 Jan 2025 755th Protothor 529 122 11ms 10 Mar 2026 756th adamnielson42 🇺🇸 525 152 10ms 6 Oct 2024 756th voidgloom 525 152 11ms 22 Oct 2024 756th omero-san 525 152 10ms 22 Sep 2025 756th brochmann 🇸🇪 525 152 10ms 12 Oct 2025 760th Macweese 525 178 405ms 3 Aug 2025 761st isaiah0311 🇺🇸 524 135 2ms 9 Feb 2026 762nd TheZwierzLF 🇵🇱 523 127 505ms 12 Dec 2025 763rd galloj 🇨🇿 522 112 19ms 4 Oct 2024 764th xyangst 521 153 10ms 1 Oct 2024 764th denisfouchard 521 153 10ms 21 Aug 2025 766th snoozingnewt 🇨🇦 520 213 138ms 2 Nov 2025 767th bac0id 519 180 388ms 9 Jan 2025 768th osNiko 🇧🇷 518 154 11ms 21 Aug 2025 769th sidok 516 109 257ms 13 Nov 2024 770th Andrey2001 515 129 549ms 1 Feb 2026 771st robin-scragg 515 155 11ms 21 Aug 2025 771st celiendonze 🇨🇭 515 155 11ms 17 Oct 2025 773rd dokutan 514 143 210ms 19 Oct 2024 774th nephila-nacrea 🇬🇧 513 77 4ms 2 Oct 2024 775th travisdoesmath 511 156 11ms 7 Sep 2025 775th Shotokhan 511 156 10ms 21 Sep 2025 777th KatieLG 🇬🇧 510 140 361ms 1 Oct 2024 778th yoshykai 510 183 374ms 12 Apr 2025 779th Chinay-Domitrix 🇺🇸 509 131 2,397ms 30 Mar 2025 780th KatieLG 🇬🇧 509 146 10ms 2 Oct 2024 781st lhulinsky 508 157 11ms 21 Oct 2024 782nd dokutan 507 126 169ms 22 Jun 2025 783rd ellis-rix 505 158 11ms 9 Dec 2024 784th msbranicky 504 138 3ms 3 Oct 2024 785th osNiko 🇧🇷 503 72 57ms 11 Jan 2026 786th snoozingnewt 🇨🇦 503 142 412ms 2 Nov 2025 787th webmiche 502 159 11ms 3 Nov 2025 788th jlangvand 501 141 1ms 15 Oct 2024 788th HumanoidCPU 501 141 1ms 7 Mar 2025 790th blaztoma 🇱🇹 500 154 119ms 28 Nov 2025 791st Mabeloid 🇳🇴 499 133 572ms 2 Oct 2024 792nd MeWhenI 🇻🇦 499 149 54ms 4 Oct 2024 793rd CheeseCake628 🇳🇴 499 160 108ms 5 Nov 2024 794th pres-abhisheksinha 495 161 10ms 8 Oct 2024 795th HumanoidCPU 493 145 419ms 5 Oct 2024 796th CarterStroik 493 161 2ms 19 Nov 2025 797th owen-c-parker 🇺🇸 492 131 11ms 1 Oct 2024 798th ibixina 492 162 10ms 13 Oct 2024 798th TheAtrossian 492 162 13ms 5 Jan 2025 800th h-hh-hhh 🇺🇦 491 177 66ms 2 Nov 2024 First Prev 721–800 of 932 Next Last