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 Alex-x90 🇺🇸 701 124 412ms 1 Oct 2024 481st Herbert00709 🇵🇱 701 124 56ms 14 Jun 2025 483rd mousetail 🇳🇱 701 133 149ms 3 Oct 2024 484th LukeBridges 🇬🇧 700 92 8ms 3 Oct 2024 485th albanian-laundromat 700 108 54ms 80 mins ago 486th HumanoidCPU 699 114 64ms 7 Mar 2025 487th tobeannouncd 697 159 146ms 13 Dec 2024 488th MeWhenI 🇻🇦 697 174 41ms 13 Feb 2025 489th emgordon154 696 134 216ms 25 Feb 2025 490th Shanethegamer 🇺🇸 693 41 3ms 4 Oct 2024 491st jipsong 🇩🇪 693 115 16ms 12 May 2025 491st luuumine 🇫🇷 693 115 17ms 2 Dec 2025 491st Bmrl7 693 115 10ms 25 Dec 2025 494th Salutations45 692 93 10ms 17 Nov 2024 494th strattonwhisler 692 93 10ms 26 Mar 2025 494th JOrE20 692 93 9ms 21 days ago 497th pardouin 🇫🇷 691 57 4ms 3 Oct 2024 498th NickTheEASDude 🇺🇸 690 115 3ms 17 Dec 2024 499th rowechenzhong 687 116 10ms 17 Oct 2024 500th MeWhenI 🇻🇦 686 68 285ms 2 Oct 2024 501st madex 🇩🇪 686 103 1ms 2 Oct 2024 502nd aDwarfNamedUrist 684 162 138ms 1 Sep 2025 503rd CatsAreFluffy 683 53 53ms 27 Dec 2024 504th MeWhenI 🇻🇦 681 108 141ms 2 Oct 2024 505th dtbao20 🇻🇳 681 117 18ms 1 Oct 2024 505th Pyroan 681 117 17ms 22 Feb 2025 505th vgamula 🇺🇦 681 117 16ms 5 Aug 2025 505th FortuiteMan 🇫🇷 681 117 17ms 1 Dec 2025 505th yujqiao 681 117 17ms 16 Dec 2025 510th the-zammers 680 163 149ms 1 Dec 2024 511th BlankSpruce 679 104 2ms 1 Oct 2024 512th tailorspy 679 128 432ms 4 Oct 2024 513th GrayJoKing 🇦🇺 678 79 1,204ms 1 Oct 2024 514th commandz0 🇺🇸 677 98 505ms 1 Sep 2025 515th elgan65536 🇺🇸 676 118 12ms 2 Oct 2024 515th logvp 676 118 17ms 6 Oct 2024 515th ahmetdemirag 🇨🇾 676 118 10ms 6 Feb 2025 515th dirckvdende 676 118 17ms 10 Jul 2025 519th edsrzf 🇳🇿 674 99 2,281ms 5 Jul 2025 519th jkelly467 674 99 2,384ms 22 Jan 2026 521st Yax42 🇫🇷 674 129 73ms 8 Jan 2026 521st emgordon154 674 129 59ms 26 days ago 523rd Herbert00709 🇵🇱 673 105 2ms 14 Jun 2025 524th jerrandolph 673 177 303ms 25 Sep 2025 524th CaedenHarper 🇨🇦 673 177 292ms 17 Nov 2025 526th error256 671 101 5ms 24 Oct 2024 527th emgordon154 670 115 120ms 9 Dec 2025 528th jtaxen 670 119 17ms 21 Oct 2024 528th psbpsbp 670 119 10ms 19 Dec 2024 528th klixel 🇨🇦 670 119 10ms 9 Apr 2025 528th vhoulbreque 🇫🇷 670 119 9ms 21 Nov 2025 532nd Shanethegamer 🇺🇸 668 65 1ms 1 Oct 2024 533rd CaedenHarper 🇨🇦 667 140 571ms 3 Oct 2025 534th rniii 666 106 1ms 2 Oct 2024 534th gastropner 666 106 2ms 11 Feb 2025 534th solisolu 666 106 2ms 20 days ago 537th dbut2 🇦🇺 666 179 297ms 31 Oct 2024 538th two-bad 🇬🇧 664 97 9ms 2 Oct 2024 538th LordSir101 664 97 11ms 10 Aug 2025 540th TaserTheFox 🇺🇸 664 120 17ms 8 Oct 2024 540th yokasuretsu 664 120 11ms 26 Jan 2025 540th Troon 664 120 11ms 17 Feb 2025 540th keelimeguy 🇺🇸 664 120 18ms 14 Jun 2025 544th CaedenHarper 🇨🇦 663 100 459ms 22 Jul 2025 545th yeminghan2021 663 131 60ms 3 Feb 2026 546th snoozingnewt 🇨🇦 662 180 291ms 2 Nov 2025 547th 4hg 🇺🇸 661 59 34ms 5 Oct 2024 548th BREMAUCY 🇫🇷 659 121 19ms 18 Jul 2025 549th xyangst 657 98 12ms 15 Oct 2024 549th BambooleanLogic 🇸🇪 657 98 9ms 21 Oct 2024 551st error256 657 142 159ms 31 May 2025 552nd AlephSquirrel 657 146 4ms 14 May 2025 553rd jwhear 🇺🇸 655 197 1,696ms 1 Oct 2024 554th chartung17 654 122 10ms 24 Mar 2025 555th w911 651 183 293ms 7 Oct 2024 556th albanian-laundromat 651 293 14ms 8 Dec 2025 557th Babafaba 650 102 530ms 11 Nov 2025 558th emgordon154 650 111 4ms 12 Jan 2025 559th DialFrost 🇸🇬 648 67 2ms 22 Dec 2024 560th msbranicky 648 123 16ms 3 Oct 2024 First Prev 481–560 of 904 Next Last