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 Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 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 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 ><> ALGOL 68 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 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 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 Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 481st emgordon154 702 76 5ms 7 Jun 2025 482nd Alex-x90 🇺🇸 701 124 412ms 1 Oct 2024 482nd Herbert00709 🇵🇱 701 124 56ms 14 Jun 2025 484th mousetail 🇳🇱 701 133 169ms 3 Oct 2024 485th LukeBridges 🇬🇧 700 92 10ms 3 Oct 2024 486th albanian-laundromat 700 108 54ms 4 days ago 487th HumanoidCPU 699 114 64ms 7 Mar 2025 488th tobeannouncd 697 159 146ms 13 Dec 2024 489th MeWhenI 🇻🇦 697 174 41ms 13 Feb 2025 490th emgordon154 696 134 241ms 25 Feb 2025 491st Shanethegamer 🇺🇸 693 41 3ms 4 Oct 2024 492nd jipsong 🇩🇪 693 115 16ms 12 May 2025 492nd luuumine 🇫🇷 693 115 17ms 2 Dec 2025 492nd Bmrl7 693 115 10ms 25 Dec 2025 495th Salutations45 692 93 11ms 17 Nov 2024 495th strattonwhisler 692 93 11ms 26 Mar 2025 495th JOrE20 692 93 11ms 25 days ago 498th pardouin 🇫🇷 691 57 4ms 3 Oct 2024 499th NickTheEASDude 🇺🇸 690 115 3ms 17 Dec 2024 500th rowechenzhong 687 116 10ms 17 Oct 2024 501st MeWhenI 🇻🇦 686 68 285ms 2 Oct 2024 502nd madex 🇩🇪 686 103 1ms 2 Oct 2024 503rd aDwarfNamedUrist 684 162 138ms 1 Sep 2025 504th CatsAreFluffy 683 53 53ms 27 Dec 2024 505th MeWhenI 🇻🇦 681 108 206ms 2 Oct 2024 506th dtbao20 🇻🇳 681 117 18ms 1 Oct 2024 506th Pyroan 681 117 17ms 22 Feb 2025 506th vgamula 🇺🇦 681 117 16ms 5 Aug 2025 506th FortuiteMan 🇫🇷 681 117 17ms 1 Dec 2025 506th yujqiao 681 117 17ms 16 Dec 2025 511th the-zammers 680 163 149ms 1 Dec 2024 512th BlankSpruce 679 104 2ms 1 Oct 2024 513th tailorspy 679 128 432ms 4 Oct 2024 514th GrayJoKing 🇦🇺 678 79 1,204ms 1 Oct 2024 515th commandz0 🇺🇸 677 98 505ms 1 Sep 2025 516th elgan65536 🇺🇸 676 118 12ms 2 Oct 2024 516th logvp 676 118 17ms 6 Oct 2024 516th ahmetdemirag 🇨🇾 676 118 10ms 6 Feb 2025 516th dirckvdende 676 118 17ms 10 Jul 2025 520th edsrzf 🇳🇿 674 99 2,281ms 5 Jul 2025 520th jkelly467 674 99 2,384ms 22 Jan 2026 522nd Yax42 🇫🇷 674 129 73ms 8 Jan 2026 522nd emgordon154 674 129 59ms 8 Feb 2026 524th Herbert00709 🇵🇱 673 105 2ms 14 Jun 2025 525th jerrandolph 673 177 295ms 25 Sep 2025 525th CaedenHarper 🇨🇦 673 177 318ms 17 Nov 2025 527th error256 671 101 5ms 24 Oct 2024 528th CaedenHarper 🇨🇦 670 99 425ms 31 hours ago 529th emgordon154 670 115 111ms 9 Dec 2025 530th jtaxen 670 119 17ms 21 Oct 2024 530th psbpsbp 670 119 10ms 19 Dec 2024 530th klixel 🇨🇦 670 119 10ms 9 Apr 2025 530th vhoulbreque 🇫🇷 670 119 9ms 21 Nov 2025 534th Shanethegamer 🇺🇸 668 65 1ms 1 Oct 2024 535th CaedenHarper 🇨🇦 667 140 571ms 3 Oct 2025 536th rniii 666 106 1ms 2 Oct 2024 536th gastropner 666 106 2ms 11 Feb 2025 536th solisolu 666 106 2ms 24 days ago 539th dbut2 🇦🇺 666 179 284ms 31 Oct 2024 540th two-bad 🇬🇧 664 97 10ms 2 Oct 2024 540th LordSir101 664 97 10ms 10 Aug 2025 542nd TaserTheFox 🇺🇸 664 120 17ms 8 Oct 2024 542nd yokasuretsu 664 120 11ms 26 Jan 2025 542nd Troon 664 120 11ms 17 Feb 2025 542nd keelimeguy 🇺🇸 664 120 18ms 14 Jun 2025 546th yeminghan2021 663 131 60ms 3 Feb 2026 547th snoozingnewt 🇨🇦 662 180 295ms 2 Nov 2025 548th 4hg 🇺🇸 661 59 34ms 5 Oct 2024 549th BREMAUCY 🇫🇷 659 121 19ms 18 Jul 2025 550th xyangst 657 98 11ms 15 Oct 2024 550th BambooleanLogic 🇸🇪 657 98 11ms 21 Oct 2024 552nd error256 657 142 164ms 31 May 2025 553rd AlephSquirrel 657 146 4ms 14 May 2025 554th jwhear 🇺🇸 655 197 1,696ms 1 Oct 2024 555th chartung17 654 122 10ms 24 Mar 2025 556th w911 651 183 281ms 7 Oct 2024 557th albanian-laundromat 651 293 14ms 8 Dec 2025 558th Babafaba 650 102 530ms 11 Nov 2025 559th emgordon154 650 111 4ms 12 Jan 2025 560th DialFrost 🇸🇬 648 67 2ms 22 Dec 2024 First Prev 481–560 of 906 Next Last