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 720th snoozingnewt 🇨🇦 550 170 485ms 5 Dec 2025 720th jusaka 550 170 355ms 3 days ago 723rd gpikmddk 549 130 417ms 30 Oct 2025 724th JDiLenarda 🇫🇷 549 165 1,394ms 1 Oct 2024 725th xyangst 549 171 171ms 1 Oct 2024 726th Matter1024 🇮🇳 548 149 445ms 14 days ago 727th kmathis22 547 171 350ms 19 Nov 2025 728th zakariamouhid 546 118 9ms 1 Oct 2024 729th croc54 546 146 10ms 15 Dec 2024 730th najs91 545 131 391ms 15 Oct 2024 730th bac0id 545 131 422ms 9 Jan 2025 730th CaedenHarper 🇨🇦 545 131 370ms 17 Oct 2025 733rd PyryL 🇫🇮 543 147 10ms 1 Mar 2025 734th eranws 542 119 9ms 23 Dec 2024 734th ComradeSquirrel 542 119 10ms 6 days ago 736th dokutan 540 131 2ms 10 Feb 2026 737th dokutan 539 107 956ms 24 days ago 738th Sciman101 539 147 2ms 26 Mar 2025 739th mbittner20 539 148 10ms 13 Oct 2024 739th YAJUE114514 539 148 10ms 12 Dec 2025 741st msbranicky 536 175 156ms 13 Dec 2024 742nd psaban 535 149 15ms 31 Jul 2025 742nd TheZwierzLF 🇵🇱 535 149 11ms 24 Nov 2025 742nd RodAlc24 🇪🇸 535 149 17ms 22 Feb 2026 745th JRaspass 🇬🇧 533 74 3ms 12 days ago 746th deancureton 533 121 9ms 30 Dec 2024 747th FlorianCassayre 🇫🇷 532 150 18ms 1 Oct 2024 747th jameswmccarty 532 150 10ms 5 Oct 2024 747th yousefalizadeh 532 150 10ms 23 Oct 2024 747th feherd 532 150 11ms 31 Oct 2024 747th kadamkaustubh 532 150 10ms 8 Nov 2025 752nd msbranicky 530 126 2,655ms 9 Jan 2025 753rd Protothor 528 122 10ms 26 days ago 754th adamnielson42 🇺🇸 525 152 10ms 6 Oct 2024 754th voidgloom 525 152 10ms 22 Oct 2024 754th omero-san 525 152 10ms 22 Sep 2025 754th brochmann 🇸🇪 525 152 10ms 12 Oct 2025 758th Macweese 525 178 405ms 3 Aug 2025 759th isaiah0311 🇺🇸 524 135 2ms 9 Feb 2026 759th jusaka 524 135 2ms 3 days ago 761st TheZwierzLF 🇵🇱 523 127 507ms 12 Dec 2025 762nd galloj 🇨🇿 522 112 19ms 4 Oct 2024 763rd xyangst 521 153 11ms 1 Oct 2024 763rd denisfouchard 521 153 10ms 21 Aug 2025 765th snoozingnewt 🇨🇦 520 213 138ms 2 Nov 2025 766th bac0id 519 180 388ms 9 Jan 2025 767th osNiko 🇧🇷 518 154 9ms 21 Aug 2025 768th sidok 516 109 248ms 13 Nov 2024 769th Andrey2001 515 129 525ms 1 Feb 2026 770th robin-scragg 515 155 11ms 21 Aug 2025 770th celiendonze 🇨🇭 515 155 10ms 17 Oct 2025 772nd dokutan 514 143 210ms 19 Oct 2024 773rd nephila-nacrea 🇬🇧 513 77 4ms 2 Oct 2024 774th travisdoesmath 511 156 10ms 7 Sep 2025 774th Shotokhan 511 156 10ms 21 Sep 2025 776th yoshykai 511 183 374ms 12 Apr 2025 777th KatieLG 🇬🇧 510 140 361ms 1 Oct 2024 778th Chinay-Domitrix 🇺🇸 509 131 2,759ms 30 Mar 2025 779th KatieLG 🇬🇧 509 146 9ms 2 Oct 2024 780th lhulinsky 508 157 10ms 21 Oct 2024 781st dokutan 507 126 156ms 22 Jun 2025 782nd ellis-rix 505 158 10ms 9 Dec 2024 783rd osNiko 🇧🇷 503 72 49ms 11 Jan 2026 784th msbranicky 503 138 3ms 3 Oct 2024 785th snoozingnewt 🇨🇦 503 142 436ms 2 Nov 2025 786th jlangvand 502 141 1ms 15 Oct 2024 786th HumanoidCPU 502 141 1ms 7 Mar 2025 788th webmiche 502 159 11ms 3 Nov 2025 789th blaztoma 🇱🇹 500 154 119ms 28 Nov 2025 790th Mabeloid 🇳🇴 499 133 538ms 2 Oct 2024 791st MeWhenI 🇻🇦 499 149 56ms 4 Oct 2024 792nd CheeseCake628 🇳🇴 498 160 104ms 5 Nov 2024 793rd pres-abhisheksinha 495 161 10ms 8 Oct 2024 794th CarterStroik 493 161 2ms 19 Nov 2025 795th owen-c-parker 🇺🇸 492 131 10ms 1 Oct 2024 796th HumanoidCPU 492 145 480ms 5 Oct 2024 797th ibixina 492 162 11ms 13 Oct 2024 797th TheAtrossian 492 162 11ms 5 Jan 2025 799th h-hh-hhh 🇺🇦 491 177 70ms 2 Nov 2024 800th snoozingnewt 🇨🇦 490 150 219ms 2 Nov 2025 First Prev 721–800 of 933 Next Last