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 MeWhenI 🇻🇦 704 115 453ms 5 Oct 2024 482nd Shanethegamer 🇺🇸 704 156 30ms 2 Oct 2024 483rd emgordon154 702 76 5ms 7 Jun 2025 484th mousetail 🇳🇱 702 133 169ms 3 Oct 2024 485th LukeBridges 🇬🇧 701 92 11ms 3 Oct 2024 486th Alex-x90 🇺🇸 701 124 435ms 1 Oct 2024 486th Herbert00709 🇵🇱 701 124 61ms 14 Jun 2025 488th albanian-laundromat 700 108 54ms 7 days ago 489th HumanoidCPU 699 114 64ms 7 Mar 2025 490th emgordon154 697 134 241ms 25 Feb 2025 491st tobeannouncd 697 159 146ms 13 Dec 2024 492nd MeWhenI 🇻🇦 697 174 41ms 13 Feb 2025 493rd Shanethegamer 🇺🇸 693 41 3ms 4 Oct 2024 494th Salutations45 693 93 10ms 17 Nov 2024 494th strattonwhisler 693 93 13ms 26 Mar 2025 494th JOrE20 693 93 10ms 12 Feb 2026 497th jipsong 🇩🇪 693 115 16ms 12 May 2025 497th luuumine 🇫🇷 693 115 17ms 2 Dec 2025 497th Bmrl7 693 115 10ms 25 Dec 2025 500th pardouin 🇫🇷 691 57 4ms 3 Oct 2024 501st NickTheEASDude 🇺🇸 690 115 3ms 17 Dec 2024 502nd rowechenzhong 687 116 10ms 17 Oct 2024 503rd MeWhenI 🇻🇦 686 68 285ms 2 Oct 2024 504th madex 🇩🇪 686 103 1ms 2 Oct 2024 505th aDwarfNamedUrist 684 162 138ms 1 Sep 2025 506th CatsAreFluffy 683 53 53ms 27 Dec 2024 507th MeWhenI 🇻🇦 681 108 206ms 2 Oct 2024 508th dtbao20 🇻🇳 681 117 18ms 1 Oct 2024 508th Pyroan 681 117 17ms 22 Feb 2025 508th vgamula 🇺🇦 681 117 16ms 5 Aug 2025 508th FortuiteMan 🇫🇷 681 117 17ms 1 Dec 2025 508th yujqiao 681 117 17ms 16 Dec 2025 513th the-zammers 680 163 149ms 1 Dec 2024 514th BlankSpruce 679 104 2ms 1 Oct 2024 515th tailorspy 679 128 456ms 4 Oct 2024 516th GrayJoKing 🇦🇺 678 79 1,204ms 1 Oct 2024 517th commandz0 🇺🇸 677 98 505ms 1 Sep 2025 518th elgan65536 🇺🇸 676 118 12ms 2 Oct 2024 518th logvp 676 118 17ms 6 Oct 2024 518th ahmetdemirag 🇨🇾 676 118 10ms 6 Feb 2025 518th dirckvdende 676 118 17ms 10 Jul 2025 522nd edsrzf 🇳🇿 674 99 2,281ms 5 Jul 2025 522nd jkelly467 674 99 2,384ms 22 Jan 2026 524th Yax42 🇫🇷 674 129 77ms 8 Jan 2026 524th emgordon154 674 129 61ms 8 Feb 2026 526th Herbert00709 🇵🇱 673 105 2ms 14 Jun 2025 527th jerrandolph 673 177 295ms 25 Sep 2025 527th CaedenHarper 🇨🇦 673 177 318ms 17 Nov 2025 529th error256 671 101 5ms 24 Oct 2024 530th CaedenHarper 🇨🇦 670 99 425ms 4 days ago 531st emgordon154 670 115 111ms 9 Dec 2025 532nd jtaxen 670 119 17ms 21 Oct 2024 532nd psbpsbp 670 119 10ms 19 Dec 2024 532nd klixel 🇨🇦 670 119 10ms 9 Apr 2025 532nd vhoulbreque 🇫🇷 670 119 9ms 21 Nov 2025 536th Shanethegamer 🇺🇸 668 65 1ms 1 Oct 2024 537th CaedenHarper 🇨🇦 667 140 571ms 3 Oct 2025 538th rniii 666 106 1ms 2 Oct 2024 538th gastropner 666 106 2ms 11 Feb 2025 538th solisolu 666 106 2ms 27 days ago 541st dbut2 🇦🇺 666 179 284ms 31 Oct 2024 542nd two-bad 🇬🇧 664 97 10ms 2 Oct 2024 542nd LordSir101 664 97 11ms 10 Aug 2025 544th TaserTheFox 🇺🇸 664 120 17ms 8 Oct 2024 544th yokasuretsu 664 120 11ms 26 Jan 2025 544th Troon 664 120 11ms 17 Feb 2025 544th keelimeguy 🇺🇸 664 120 18ms 14 Jun 2025 548th yeminghan2021 663 131 74ms 3 Feb 2026 549th snoozingnewt 🇨🇦 662 180 295ms 2 Nov 2025 550th 4hg 🇺🇸 661 59 34ms 5 Oct 2024 551st BREMAUCY 🇫🇷 659 121 19ms 18 Jul 2025 552nd xyangst 658 98 10ms 15 Oct 2024 552nd BambooleanLogic 🇸🇪 658 98 10ms 21 Oct 2024 554th error256 658 142 164ms 31 May 2025 555th AlephSquirrel 657 146 4ms 14 May 2025 556th jwhear 🇺🇸 655 197 1,696ms 1 Oct 2024 557th chartung17 654 122 10ms 24 Mar 2025 558th w911 651 183 281ms 7 Oct 2024 559th albanian-laundromat 651 293 14ms 8 Dec 2025 560th Babafaba 650 102 530ms 11 Nov 2025 First Prev 481–560 of 911 Next Last