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 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 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 Apéry’s Constant Binary Lambda Calculus Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> 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 ALGOL 68 APL ArkScript 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 ><> 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 ALGOL 68 APL ArkScript 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 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 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 Apéry’s Constant Binary Lambda Calculus Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 320th snoozingnewt 🇨🇦 782 102 9ms 6 Dec 2025 320th solisolu 782 102 10ms 31 Dec 2025 320th Flekay 🇩🇪 782 102 18ms 43 hours ago 324th SirBogman 🇺🇸 780 50 32ms 8 Jul 2025 325th GrayJoKing 🇦🇺 779 82 134ms 1 Oct 2024 326th sean-niemann 🇺🇸 779 107 332ms 3 Oct 2024 327th m-tkach 🇺🇦 779 131 2ms 4 Oct 2024 328th Shanethegamer 🇺🇸 778 120 364ms 24 Sep 2025 329th albanian-laundromat 777 74 1,047ms 3 Nov 2025 330th adriweb 🇫🇷 777 102 1ms 5 Oct 2024 331st uttumuttu 🇫🇮 776 83 12ms 1 Oct 2024 331st KatieLG 🇬🇧 776 83 10ms 1 Oct 2024 331st Larento 776 83 15ms 4 Nov 2024 331st Andrey-Plotnikov 776 83 10ms 13 Jan 2025 331st nathanadams 🇳🇿 776 83 10ms 6 Oct 2025 336th xsot 🇸🇬 776 125 7ms 20 Oct 2024 337th duckyluuk 🇳🇱 775 97 10ms 25 Nov 2025 338th Natanaelel 🇸🇪 775 143 145ms 20 Apr 2025 339th DialFrost 🇸🇬 772 121 369ms 24 Sep 2025 340th sisyphus-ppcg 🇦🇺 771 62 40ms 3 Oct 2024 341st DialFrost 🇸🇬 771 90 2ms 18 Nov 2025 342nd sean-niemann 🇺🇸 771 105 461ms 1 Oct 2024 343rd emgordon154 770 83 134ms 18 Nov 2024 344th targrik 770 88 8ms 7 Feb 2025 345th Waffle3z 770 103 2ms 2 Oct 2024 346th retrohun 769 63 20ms 2 Oct 2024 347th luuumine 🇫🇷 768 92 1ms 5 Dec 2025 347th bzd7 768 92 2ms 7 Dec 2025 349th lifthrasiir 🇰🇷 767 37 2ms 27 Nov 2024 350th jatloe 767 104 10ms 1 Oct 2024 351st didion0 🇺🇸 766 84 14ms 10 Jan 2025 352nd MeWhenI 🇻🇦 765 109 334ms 2 Oct 2024 352nd edsrzf 🇳🇿 765 109 365ms 23 Jul 2025 354th ovs-code 🇩🇪 764 122 157ms 25 Apr 2025 355th albanian-laundromat 763 118 84ms 13 Nov 2025 356th Shanethegamer 🇺🇸 763 124 6ms 4 Oct 2024 357th GolfingSuccess 🇬🇷 762 70 6ms 6 Jun 2025 358th MeWhenI 🇻🇦 761 89 6ms 2 Oct 2024 359th emgordon154 759 63 35ms 18 Nov 2024 359th SirBogman 🇺🇸 759 63 33ms 19 Jul 2025 361st sean-niemann 🇺🇸 759 93 1ms 24 Oct 2024 362nd fourth-bit 759 105 17ms 1 Oct 2024 362nd jared-hughes 759 105 16ms 3 Oct 2024 362nd mattyhempstead 759 105 26ms 7 Oct 2024 365th CLOStrophobic 🇮🇹 758 160 40ms 27 Feb 2025 366th DialFrost 🇸🇬 757 76 1,013ms 30 Aug 2025 367th weliveinhell 🇭🇹 757 85 10ms 1 Oct 2024 367th SteRoy 757 85 10ms 13 May 2025 369th MeWhenI 🇻🇦 754 88 440ms 2 Oct 2024 369th albanian-laundromat 754 88 462ms 3 Nov 2025 371st 0xjac 🇨🇭 754 158 287ms 17 Jun 2025 372nd GrayJoKing 🇦🇺 753 90 5ms 1 Oct 2024 373rd davecame 752 106 17ms 1 Oct 2024 373rd starfihs 752 106 10ms 2 Oct 2024 373rd rschwa6308 🇺🇸 752 106 16ms 28 Oct 2024 373rd snydej 752 106 17ms 21 Nov 2024 373rd andrewjc2000 752 106 17ms 17 Jul 2025 373rd qpwoeirut 752 106 10ms 19 Aug 2025 373rd KatieLG 🇬🇧 752 106 17ms 10 days ago 380th stefangimmillaro 751 94 1ms 30 Oct 2024 380th emgordon154 751 94 2ms 13 days ago 382nd stackofbears 750 52 34ms 14 Mar 2025 383rd MeWhenI 🇻🇦 750 89 2,127ms 24 Oct 2024 384th Maznek 749 86 11ms 4 Oct 2024 385th sean-niemann 🇺🇸 749 116 409ms 24 Oct 2024 385th luuumine 🇫🇷 749 116 398ms 15 Dec 2025 387th MeWhenI 🇻🇦 749 162 26ms 2 Oct 2024 388th MeWhenI 🇻🇦 748 106 1ms 2 Oct 2024 389th rak1507 🇬🇧 747 38 2ms 30 Dec 2024 390th Shanethegamer 🇺🇸 747 64 35ms 3 Oct 2024 390th Andriamanitra 🇫🇮 747 64 36ms 5 Oct 2024 392nd sean-niemann 🇺🇸 747 93 111ms 24 Oct 2024 393rd commandz0 🇺🇸 745 107 17ms 7 Oct 2024 393rd zbreit 🇺🇸 745 107 16ms 29 Oct 2024 393rd StardustGogeta 745 107 17ms 30 Oct 2024 393rd ZakkkkAttackkkk 🇵🇭 745 107 16ms 8 Feb 2025 393rd InigoK 🇺🇸 745 107 17ms 22 Sep 2025 398th Shanethegamer 🇺🇸 744 121 98ms 3 Oct 2024 399th Natanaelel 🇸🇪 743 53 3ms 10 Jan 2026 400th SirBogman 🇺🇸 741 63 283ms 23 Jul 2025 First Prev 321–400 of 895 Next Last