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 481st rowechenzhong 687 116 10ms 17 Oct 2024 482nd MeWhenI 🇻🇦 686 68 285ms 2 Oct 2024 483rd madex 🇩🇪 685 103 1ms 2 Oct 2024 484th aDwarfNamedUrist 684 162 138ms 1 Sep 2025 485th CatsAreFluffy 683 53 53ms 27 Dec 2024 486th MeWhenI 🇻🇦 681 108 141ms 2 Oct 2024 487th dtbao20 🇻🇳 681 117 18ms 1 Oct 2024 487th Pyroan 681 117 17ms 22 Feb 2025 487th vgamula 🇺🇦 681 117 16ms 5 Aug 2025 487th FortuiteMan 🇫🇷 681 117 17ms 1 Dec 2025 487th yujqiao 681 117 17ms 16 Dec 2025 492nd the-zammers 680 163 149ms 1 Dec 2024 493rd BlankSpruce 679 104 2ms 1 Oct 2024 494th GrayJoKing 🇦🇺 678 79 1,204ms 1 Oct 2024 495th tailorspy 678 128 403ms 4 Oct 2024 496th commandz0 🇺🇸 676 98 505ms 1 Sep 2025 497th elgan65536 675 118 13ms 2 Oct 2024 497th logvp 675 118 17ms 6 Oct 2024 497th ahmetdemirag 🇨🇾 675 118 10ms 6 Feb 2025 497th dirckvdende 675 118 17ms 10 Jul 2025 501st edsrzf 🇳🇿 674 99 2,281ms 5 Jul 2025 501st jkelly467 674 99 2,384ms 16 days ago 503rd Yax42 🇫🇷 673 129 70ms 8 Jan 2026 504th jerrandolph 673 177 347ms 25 Sep 2025 504th CaedenHarper 🇨🇦 673 177 271ms 17 Nov 2025 506th Herbert00709 🇵🇱 672 105 2ms 14 Jun 2025 507th emgordon154 670 115 138ms 9 Dec 2025 508th jtaxen 670 119 17ms 21 Oct 2024 508th psbpsbp 670 119 10ms 19 Dec 2024 508th klixel 🇨🇦 670 119 11ms 9 Apr 2025 508th vhoulbreque 🇫🇷 670 119 10ms 21 Nov 2025 512th error256 669 101 5ms 24 Oct 2024 513th Shanethegamer 🇺🇸 668 65 2ms 1 Oct 2024 514th emgordon154 667 130 61ms 96 mins ago 515th CaedenHarper 🇨🇦 667 140 594ms 3 Oct 2025 516th rniii 666 106 1ms 2 Oct 2024 516th gastropner 666 106 2ms 11 Feb 2025 518th dbut2 🇦🇺 666 179 285ms 31 Oct 2024 519th emgordon154 665 111 4ms 12 Jan 2025 520th two-bad 🇬🇧 664 97 10ms 2 Oct 2024 520th LordSir101 664 97 9ms 10 Aug 2025 522nd TaserTheFox 🇺🇸 664 120 17ms 8 Oct 2024 522nd yokasuretsu 664 120 11ms 26 Jan 2025 522nd Troon 664 120 11ms 17 Feb 2025 522nd keelimeguy 🇺🇸 664 120 18ms 14 Jun 2025 526th CaedenHarper 🇨🇦 663 100 517ms 22 Jul 2025 527th yeminghan2021 662 131 56ms 4 days ago 528th snoozingnewt 🇨🇦 662 180 296ms 2 Nov 2025 529th 4hg 🇺🇸 661 59 34ms 5 Oct 2024 530th BREMAUCY 🇫🇷 659 121 24ms 18 Jul 2025 531st xyangst 657 98 10ms 15 Oct 2024 531st BambooleanLogic 🇸🇪 657 98 10ms 21 Oct 2024 533rd error256 657 142 166ms 31 May 2025 534th AlephSquirrel 657 146 4ms 14 May 2025 535th jwhear 🇺🇸 655 197 1,696ms 1 Oct 2024 536th chartung17 653 122 10ms 24 Mar 2025 537th w911 651 183 329ms 7 Oct 2024 538th albanian-laundromat 651 293 14ms 8 Dec 2025 539th Babafaba 650 102 530ms 11 Nov 2025 540th DialFrost 🇸🇬 648 67 2ms 22 Dec 2024 541st MeWhenI 🇻🇦 648 91 994ms 29 Aug 2025 542nd msbranicky 648 123 18ms 3 Oct 2024 542nd bobbysq 648 123 11ms 5 Oct 2024 542nd wuzekai518 648 123 10ms 8 Oct 2024 545th rucin93 🇵🇱 648 144 148ms 28 Oct 2024 546th koipondx86 645 123 2ms 8 Nov 2024 547th CaedenHarper 🇨🇦 644 100 9ms 22 Aug 2025 547th iczelia 🇩🇪 644 100 9ms 11 Oct 2025 547th Yax42 🇫🇷 644 100 10ms 27 Nov 2025 550th Apataras 644 145 414ms 25 Jun 2025 551st tomh1012 643 111 539ms 8 Sep 2025 552nd NotEvenIndian 643 124 10ms 22 Oct 2024 552nd ridingqwerty 🇺🇸 643 124 16ms 16 Jan 2025 552nd CommandLeo 🇮🇹 643 124 11ms 5 Oct 2025 555th Jonatan6 🇩🇰 642 110 2ms 24 Oct 2024 555th solisolu 642 110 2ms 25 Nov 2025 557th dokutan 640 146 379ms 23 Nov 2025 558th stefangimmillaro 639 73 331ms 1 Oct 2024 559th elgan65536 639 146 153ms 2 Oct 2024 559th luuumine 🇫🇷 639 146 147ms 26 Nov 2025 First Prev 481–560 of 878 Next Last