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 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 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 Calendar 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 Multitap Input NFA Simulator 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 Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 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 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 Calendar 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 Multitap Input NFA Simulator 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 300th namelessiw 784 119 440ms 9 Oct 2025 302nd Shanethegamer 🇺🇸 784 152 264ms 3 Oct 2024 302nd targrik 784 152 264ms 7 Jul 2025 304th stefangimmillaro 783 61 33ms 1 Oct 2024 305th Shanethegamer 🇺🇸 782 91 358ms 3 Oct 2024 306th annaproxy 781 102 16ms 1 Oct 2024 306th snoozingnewt 🇨🇦 781 102 9ms 47 hours ago 308th SirBogman 🇺🇸 780 50 36ms 8 Jul 2025 309th MeWhenI 🇻🇦 780 122 39ms 5 Oct 2024 310th GrayJoKing 🇦🇺 779 82 127ms 1 Oct 2024 311th sean-niemann 🇺🇸 779 107 331ms 3 Oct 2024 312th adriweb 🇫🇷 777 102 2ms 5 Oct 2024 313th Shanethegamer 🇺🇸 777 120 454ms 24 Sep 2025 314th emgordon154 777 166 1,626ms 2 Oct 2024 315th DialFrost 🇸🇬 776 76 945ms 30 Aug 2025 316th m-tkach 🇺🇦 776 131 3ms 4 Oct 2024 317th uttumuttu 🇫🇮 775 83 10ms 1 Oct 2024 317th KatieLG 🇬🇧 775 83 9ms 1 Oct 2024 317th Larento 775 83 9ms 4 Nov 2024 317th Andrey-Plotnikov 775 83 9ms 13 Jan 2025 317th nathanadams 🇳🇿 775 83 9ms 6 Oct 2025 322nd duckyluuk 🇳🇱 775 97 9ms 13 days ago 323rd Natanaelel 🇸🇪 772 143 148ms 20 Apr 2025 324th sean-niemann 🇺🇸 771 105 440ms 1 Oct 2024 325th DialFrost 🇸🇬 771 121 349ms 24 Sep 2025 326th sisyphus-ppcg 🇦🇺 770 62 34ms 3 Oct 2024 327th emgordon154 770 83 131ms 18 Nov 2024 328th Waffle3z 770 103 1ms 2 Oct 2024 329th retrohun 769 63 20ms 2 Oct 2024 330th DialFrost 🇸🇬 769 90 2ms 19 days ago 331st targrik 768 88 8ms 7 Feb 2025 332nd lifthrasiir 🇰🇷 767 37 2ms 27 Nov 2024 333rd didion0 🇺🇸 766 84 9ms 10 Jan 2025 334th jatloe 766 104 9ms 1 Oct 2024 334th solisolu 766 104 9ms 23 days ago 336th DialFrost 🇸🇬 766 131 7ms 11 Dec 2024 337th luuumine 🇫🇷 765 92 1ms 2 days ago 337th bzd7 765 92 2ms 43 hours ago 339th MeWhenI 🇻🇦 765 109 331ms 2 Oct 2024 339th edsrzf 🇳🇿 765 109 377ms 23 Jul 2025 341st ovs-code 🇩🇪 764 122 152ms 25 Apr 2025 342nd albanian-laundromat 763 118 77ms 25 days ago 343rd Shanethegamer 🇺🇸 763 124 6ms 4 Oct 2024 344th GolfingSuccess 🇬🇷 762 70 6ms 6 Jun 2025 345th GrayJoKing 🇦🇺 761 79 1,080ms 1 Oct 2024 346th Shanethegamer 🇺🇸 761 132 7ms 2 Oct 2024 347th MeWhenI 🇻🇦 759 89 5ms 2 Oct 2024 348th fourth-bit 759 105 19ms 1 Oct 2024 348th jared-hughes 759 105 15ms 3 Oct 2024 348th mattyhempstead 759 105 27ms 7 Oct 2024 351st emgordon154 758 63 37ms 18 Nov 2024 351st SirBogman 🇺🇸 758 63 32ms 19 Jul 2025 353rd weliveinhell 🇭🇹 757 85 9ms 1 Oct 2024 353rd SteRoy 757 85 10ms 13 May 2025 355th sean-niemann 🇺🇸 757 93 3ms 24 Oct 2024 356th 0xjac 🇨🇭 754 158 256ms 17 Jun 2025 357th MeWhenI 🇻🇦 753 88 504ms 2 Oct 2024 357th albanian-laundromat 753 88 532ms 3 Nov 2025 359th GrayJoKing 🇦🇺 751 90 4ms 1 Oct 2024 360th davecame 751 106 15ms 1 Oct 2024 360th starfihs 751 106 10ms 2 Oct 2024 360th rschwa6308 🇺🇸 751 106 16ms 28 Oct 2024 360th snydej 751 106 15ms 21 Nov 2024 360th andrewjc2000 751 106 15ms 17 Jul 2025 360th qpwoeirut 751 106 9ms 19 Aug 2025 366th stackofbears 750 52 38ms 14 Mar 2025 367th stefangimmillaro 749 94 1ms 30 Oct 2024 368th MeWhenI 🇻🇦 749 162 26ms 2 Oct 2024 369th Maznek 748 86 10ms 4 Oct 2024 370th MeWhenI 🇻🇦 748 106 1ms 2 Oct 2024 371st rak1507 🇬🇧 747 38 2ms 30 Dec 2024 372nd Shanethegamer 🇺🇸 746 64 32ms 3 Oct 2024 372nd Andriamanitra 🇫🇮 746 64 32ms 5 Oct 2024 374th MeWhenI 🇻🇦 746 89 2,716ms 24 Oct 2024 375th commandblockguy 🇺🇸 744 107 15ms 7 Oct 2024 First Prev 301–375 of 842 Next Last