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 721st CaedenHarper 🇨🇦 556 104 1,059ms 24 Nov 2025 722nd madex 🇩🇪 556 116 16ms 1 Oct 2024 723rd edsrzf 🇳🇿 554 135 6ms 27 Feb 2025 724th hiichbindermax 554 144 19ms 2 Oct 2024 724th mathisfun271 554 144 12ms 14 Oct 2024 724th bob-th 554 144 11ms 22 Oct 2024 724th cuvam 🇺🇸 554 144 17ms 3 days ago 728th snoozingnewt 🇨🇦 554 148 132ms 20 Nov 2025 729th msbranicky 554 185 4ms 20 Jan 2025 730th MeWhenI 🇻🇦 554 290 8ms 2 Oct 2024 731st denkyuu1 553 102 350ms 14 days ago 732nd mousetail 🇳🇱 553 128 2ms 3 Oct 2024 733rd Matter1024 🇮🇳 551 149 437ms 22 Mar 2026 734th gpikmddk 550 130 599ms 30 Oct 2025 735th JunkIce 550 145 10ms 3 Dec 2024 736th ethanlally 550 170 439ms 19 Nov 2025 736th snoozingnewt 🇨🇦 550 170 488ms 5 Dec 2025 738th JDiLenarda 🇫🇷 549 165 1,630ms 1 Oct 2024 739th xyangst 549 171 179ms 1 Oct 2024 740th zakariamouhid 547 118 12ms 1 Oct 2024 741st kmathis22 547 171 509ms 19 Nov 2025 742nd najs91 546 131 401ms 15 Oct 2024 742nd bac0id 546 131 444ms 9 Jan 2025 742nd CaedenHarper 🇨🇦 546 131 409ms 17 Oct 2025 745th croc54 546 146 11ms 15 Dec 2024 746th PyryL 🇫🇮 543 147 11ms 1 Mar 2025 747th eranws 542 119 11ms 23 Dec 2024 748th dokutan 540 107 1,123ms 12 Mar 2026 749th dokutan 540 131 2ms 10 Feb 2026 750th Sciman101 540 147 2ms 26 Mar 2025 751st mbittner20 539 148 10ms 13 Oct 2024 751st YAJUE114514 539 148 10ms 12 Dec 2025 753rd msbranicky 536 175 161ms 13 Dec 2024 754th psaban 535 149 18ms 31 Jul 2025 754th TheZwierzLF 🇵🇱 535 149 11ms 24 Nov 2025 754th RodAlc24 🇪🇸 535 149 18ms 22 Feb 2026 757th JRaspass 🇬🇧 534 74 3ms 24 Mar 2026 758th deancureton 533 121 11ms 30 Dec 2024 759th FlorianCassayre 🇫🇷 532 150 18ms 1 Oct 2024 759th jameswmccarty 532 150 11ms 5 Oct 2024 759th yousefalizadeh 532 150 11ms 23 Oct 2024 759th feherd 532 150 10ms 31 Oct 2024 759th kadamkaustubh 532 150 11ms 8 Nov 2025 764th msbranicky 531 126 2,384ms 9 Jan 2025 765th jusaka 531 176 544ms 9 days ago 766th Protothor 529 122 10ms 10 Mar 2026 767th adamnielson42 🇺🇸 525 152 10ms 6 Oct 2024 767th voidgloom 525 152 11ms 22 Oct 2024 767th omero-san 525 152 10ms 22 Sep 2025 767th brochmann 🇸🇪 525 152 10ms 12 Oct 2025 771st Macweese 525 178 448ms 3 Aug 2025 772nd isaiah0311 🇺🇸 524 135 2ms 9 Feb 2026 773rd TheZwierzLF 🇵🇱 523 127 505ms 12 Dec 2025 774th galloj 🇨🇿 522 112 22ms 4 Oct 2024 775th snoozingnewt 🇨🇦 522 213 138ms 2 Nov 2025 776th xyangst 521 153 10ms 1 Oct 2024 776th denisfouchard 521 153 10ms 21 Aug 2025 778th bac0id 519 180 392ms 9 Jan 2025 779th osNiko 🇧🇷 518 154 11ms 21 Aug 2025 780th sidok 517 109 235ms 13 Nov 2024 781st dokutan 517 143 210ms 19 Oct 2024 782nd Andrey2001 515 129 549ms 1 Feb 2026 783rd robin-scragg 515 155 11ms 21 Aug 2025 783rd celiendonze 🇨🇭 515 155 11ms 17 Oct 2025 785th nephila-nacrea 🇬🇧 513 77 4ms 2 Oct 2024 786th KatieLG 🇬🇧 512 146 9ms 2 Oct 2024 787th KatieLG 🇬🇧 511 140 431ms 1 Oct 2024 788th travisdoesmath 511 156 11ms 7 Sep 2025 788th Shotokhan 511 156 10ms 21 Sep 2025 790th yoshykai 511 183 406ms 12 Apr 2025 791st Chinay-Domitrix 🇺🇸 510 131 2,441ms 30 Mar 2025 792nd dokutan 509 126 141ms 22 Jun 2025 793rd lhulinsky 508 157 11ms 21 Oct 2024 794th msbranicky 506 138 3ms 3 Oct 2024 795th osNiko 🇧🇷 505 72 57ms 11 Jan 2026 796th ellis-rix 505 158 11ms 9 Dec 2024 797th snoozingnewt 🇨🇦 504 142 471ms 2 Nov 2025 798th blaztoma 🇱🇹 504 154 119ms 28 Nov 2025 799th jlangvand 502 141 1ms 15 Oct 2024 799th HumanoidCPU 502 141 1ms 7 Mar 2025 First Prev 721–800 of 1,012 Next Last