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 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 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 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 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 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 Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 321st emgordon154 787 164 1,815ms 22 Dec 2025 322nd KingSkyrock 🇺🇸 786 82 11ms 14 Oct 2024 323rd stefangimmillaro 785 61 35ms 1 Oct 2024 324th edsrzf 🇳🇿 785 119 155ms 23 Jul 2025 324th namelessiw 785 119 565ms 9 Oct 2025 326th SirBogman 🇺🇸 785 138 39ms 11 Jul 2025 327th Shanethegamer 🇺🇸 784 91 442ms 3 Oct 2024 328th Shanethegamer 🇺🇸 784 152 278ms 3 Oct 2024 328th targrik 784 152 304ms 7 Jul 2025 330th annaproxy 782 102 17ms 1 Oct 2024 330th snoozingnewt 🇨🇦 782 102 9ms 6 Dec 2025 330th Flekay 🇩🇪 782 102 18ms 19 Feb 2026 330th dokutan 782 102 16ms 9 days ago 334th SirBogman 🇺🇸 780 50 32ms 8 Jul 2025 335th duckyluuk 🇳🇱 780 97 10ms 25 Nov 2025 336th albanian-laundromat 779 74 1,047ms 3 Nov 2025 337th GrayJoKing 🇦🇺 779 82 133ms 1 Oct 2024 338th sean-niemann 🇺🇸 779 107 375ms 3 Oct 2024 339th m-tkach 🇺🇦 779 131 2ms 4 Oct 2024 340th Shanethegamer 🇺🇸 778 120 364ms 24 Sep 2025 341st adriweb 🇫🇷 777 102 1ms 5 Oct 2024 342nd uttumuttu 🇫🇮 776 83 8ms 1 Oct 2024 342nd KatieLG 🇬🇧 776 83 11ms 1 Oct 2024 342nd Larento 776 83 9ms 4 Nov 2024 342nd Andrey-Plotnikov 776 83 9ms 13 Jan 2025 342nd nathanadams 🇳🇿 776 83 11ms 6 Oct 2025 347th AlephSquirrel 776 124 7ms 21 Oct 2024 348th Natanaelel 🇸🇪 775 143 145ms 20 Apr 2025 349th kg583 🇺🇸 775 156 48ms 6 days ago 350th sisyphus-ppcg 🇦🇺 772 62 38ms 3 Oct 2024 351st DialFrost 🇸🇬 772 121 369ms 24 Sep 2025 352nd DialFrost 🇸🇬 771 90 2ms 18 Nov 2025 353rd sean-niemann 🇺🇸 771 105 461ms 1 Oct 2024 354th emgordon154 770 83 138ms 18 Nov 2024 355th targrik 770 88 9ms 7 Feb 2025 356th Waffle3z 770 103 2ms 2 Oct 2024 357th xsot 🇸🇬 770 125 7ms 20 Oct 2024 358th retrohun 769 63 20ms 2 Oct 2024 359th luuumine 🇫🇷 768 92 1ms 5 Dec 2025 359th bzd7 768 92 2ms 7 Dec 2025 361st lifthrasiir 🇰🇷 767 37 2ms 27 Nov 2024 362nd didion0 🇺🇸 767 84 11ms 10 Jan 2025 363rd jatloe 767 104 10ms 1 Oct 2024 364th ovs-code 🇩🇪 766 122 156ms 25 Apr 2025 365th MeWhenI 🇻🇦 765 109 372ms 2 Oct 2024 366th albanian-laundromat 763 118 90ms 13 Nov 2025 367th Shanethegamer 🇺🇸 763 124 7ms 4 Oct 2024 368th GolfingSuccess 🇬🇷 762 70 6ms 6 Jun 2025 369th MeWhenI 🇻🇦 761 89 5ms 2 Oct 2024 370th emgordon154 760 63 35ms 18 Nov 2024 370th SirBogman 🇺🇸 760 63 35ms 19 Jul 2025 372nd DialFrost 🇸🇬 759 76 1,013ms 30 Aug 2025 373rd sean-niemann 🇺🇸 759 93 1ms 24 Oct 2024 374th fourth-bit 759 105 17ms 1 Oct 2024 374th jared-hughes 759 105 16ms 3 Oct 2024 374th mattyhempstead 759 105 26ms 7 Oct 2024 377th albanian-laundromat 759 161 27ms 11 days ago 378th weliveinhell 🇭🇹 758 85 10ms 1 Oct 2024 378th SteRoy 758 85 11ms 13 May 2025 380th CLOStrophobic 🇮🇹 758 160 40ms 27 Feb 2025 381st MeWhenI 🇻🇦 754 88 440ms 2 Oct 2024 381st albanian-laundromat 754 88 462ms 3 Nov 2025 383rd 0xjac 🇨🇭 754 158 266ms 17 Jun 2025 384th MeWhenI 🇻🇦 754 162 26ms 2 Oct 2024 385th GrayJoKing 🇦🇺 753 90 5ms 1 Oct 2024 386th davecame 752 106 17ms 1 Oct 2024 386th starfihs 752 106 10ms 2 Oct 2024 386th rschwa6308 🇺🇸 752 106 16ms 28 Oct 2024 386th snydej 752 106 17ms 21 Nov 2024 386th andrewjc2000 752 106 17ms 17 Jul 2025 386th qpwoeirut 752 106 10ms 19 Aug 2025 386th KatieLG 🇬🇧 752 106 17ms 11 Feb 2026 393rd stefangimmillaro 751 94 1ms 30 Oct 2024 393rd emgordon154 751 94 2ms 7 Feb 2026 395th stackofbears 750 52 34ms 14 Mar 2025 396th MeWhenI 🇻🇦 750 89 2,621ms 24 Oct 2024 397th Maznek 749 86 10ms 4 Oct 2024 398th sean-niemann 🇺🇸 749 116 453ms 24 Oct 2024 398th luuumine 🇫🇷 749 116 461ms 15 Dec 2025 400th Shanethegamer 🇺🇸 748 64 36ms 3 Oct 2024 First Prev 321–400 of 913 Next Last