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 ethanlally 550 170 377ms 19 Nov 2025 721st snoozingnewt 🇨🇦 550 170 485ms 5 Dec 2025 721st jusaka 550 170 355ms 5 days ago 724th gpikmddk 549 130 417ms 30 Oct 2025 725th JDiLenarda 🇫🇷 549 165 1,394ms 1 Oct 2024 726th xyangst 549 171 171ms 1 Oct 2024 727th Matter1024 🇮🇳 548 149 445ms 16 days ago 728th kmathis22 547 171 350ms 19 Nov 2025 729th zakariamouhid 546 118 10ms 1 Oct 2024 730th croc54 546 146 10ms 15 Dec 2024 731st najs91 545 131 391ms 15 Oct 2024 731st bac0id 545 131 422ms 9 Jan 2025 731st CaedenHarper 🇨🇦 545 131 370ms 17 Oct 2025 734th PyryL 🇫🇮 543 147 10ms 1 Mar 2025 735th eranws 542 119 10ms 23 Dec 2024 735th ComradeSquirrel 542 119 10ms 8 days ago 737th dokutan 540 131 2ms 10 Feb 2026 738th dokutan 539 107 956ms 25 days ago 739th Sciman101 539 147 2ms 26 Mar 2025 740th mbittner20 539 148 10ms 13 Oct 2024 740th YAJUE114514 539 148 10ms 12 Dec 2025 742nd msbranicky 536 175 156ms 13 Dec 2024 743rd psaban 535 149 15ms 31 Jul 2025 743rd TheZwierzLF 🇵🇱 535 149 11ms 24 Nov 2025 743rd RodAlc24 🇪🇸 535 149 17ms 22 Feb 2026 746th JRaspass 🇬🇧 533 74 3ms 13 days ago 747th deancureton 533 121 11ms 30 Dec 2024 748th FlorianCassayre 🇫🇷 532 150 18ms 1 Oct 2024 748th jameswmccarty 532 150 10ms 5 Oct 2024 748th yousefalizadeh 532 150 10ms 23 Oct 2024 748th feherd 532 150 11ms 31 Oct 2024 748th kadamkaustubh 532 150 10ms 8 Nov 2025 753rd msbranicky 530 126 2,349ms 9 Jan 2025 754th Protothor 528 122 10ms 10 Mar 2026 755th adamnielson42 🇺🇸 525 152 10ms 6 Oct 2024 755th voidgloom 525 152 10ms 22 Oct 2024 755th omero-san 525 152 10ms 22 Sep 2025 755th brochmann 🇸🇪 525 152 10ms 12 Oct 2025 759th Macweese 525 178 405ms 3 Aug 2025 760th isaiah0311 🇺🇸 524 135 2ms 9 Feb 2026 760th jusaka 524 135 2ms 5 days ago 762nd TheZwierzLF 🇵🇱 523 127 507ms 12 Dec 2025 763rd galloj 🇨🇿 522 112 19ms 4 Oct 2024 764th denkyuu1 521 108 299ms 4 hours ago 765th xyangst 521 153 10ms 1 Oct 2024 765th denisfouchard 521 153 10ms 21 Aug 2025 767th snoozingnewt 🇨🇦 520 213 138ms 2 Nov 2025 768th bac0id 519 180 388ms 9 Jan 2025 769th osNiko 🇧🇷 518 154 9ms 21 Aug 2025 770th sidok 516 109 248ms 13 Nov 2024 771st Andrey2001 515 129 525ms 1 Feb 2026 772nd robin-scragg 515 155 11ms 21 Aug 2025 772nd celiendonze 🇨🇭 515 155 10ms 17 Oct 2025 774th dokutan 514 143 210ms 19 Oct 2024 775th nephila-nacrea 🇬🇧 513 77 4ms 2 Oct 2024 776th travisdoesmath 511 156 10ms 7 Sep 2025 776th Shotokhan 511 156 10ms 21 Sep 2025 778th yoshykai 511 183 374ms 12 Apr 2025 779th KatieLG 🇬🇧 510 140 361ms 1 Oct 2024 780th Chinay-Domitrix 🇺🇸 509 131 2,504ms 30 Mar 2025 781st KatieLG 🇬🇧 509 146 9ms 2 Oct 2024 782nd lhulinsky 508 157 10ms 21 Oct 2024 783rd dokutan 507 126 145ms 22 Jun 2025 784th ellis-rix 505 158 10ms 9 Dec 2024 785th osNiko 🇧🇷 503 72 57ms 11 Jan 2026 786th msbranicky 503 138 3ms 3 Oct 2024 787th snoozingnewt 🇨🇦 503 142 436ms 2 Nov 2025 788th jlangvand 502 141 1ms 15 Oct 2024 788th HumanoidCPU 502 141 1ms 7 Mar 2025 790th webmiche 502 159 10ms 3 Nov 2025 791st blaztoma 🇱🇹 500 154 119ms 28 Nov 2025 792nd Mabeloid 🇳🇴 499 133 518ms 2 Oct 2024 793rd MeWhenI 🇻🇦 499 149 56ms 4 Oct 2024 794th CheeseCake628 🇳🇴 498 160 104ms 5 Nov 2024 795th pres-abhisheksinha 495 161 10ms 8 Oct 2024 796th CarterStroik 493 161 2ms 19 Nov 2025 797th owen-c-parker 🇺🇸 492 131 14ms 1 Oct 2024 798th HumanoidCPU 492 145 480ms 5 Oct 2024 799th ibixina 492 162 11ms 13 Oct 2024 799th TheAtrossian 492 162 11ms 5 Jan 2025 First Prev 721–800 of 934 Next Last