Card Number Validation in all languages in chars. 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 Chars Time Submitted 641st gpikmddk 549 130 464ms 30 Oct 2025 642nd ethanlally 549 170 377ms 19 Nov 2025 642nd snoozingnewt 🇨🇦 549 170 485ms 5 Dec 2025 644th KatieLG 🇬🇧 548 105 439ms 11 Feb 2026 645th elgan65536 🇺🇸 548 118 12ms 2 Oct 2024 645th logvp 548 118 17ms 6 Oct 2024 645th ahmetdemirag 🇨🇾 548 118 10ms 6 Feb 2025 645th dirckvdende 548 118 17ms 10 Jul 2025 649th zakariamouhid 546 118 9ms 1 Oct 2024 650th xyangst 546 171 178ms 1 Oct 2024 650th kmathis22 546 171 350ms 19 Nov 2025 652nd najs91 545 131 420ms 15 Oct 2024 652nd bac0id 545 131 446ms 9 Jan 2025 652nd CaedenHarper 🇨🇦 545 131 407ms 17 Oct 2025 655th jtaxen 543 119 17ms 21 Oct 2024 655th psbpsbp 543 119 10ms 19 Dec 2024 655th klixel 🇨🇦 543 119 10ms 9 Apr 2025 655th vhoulbreque 🇫🇷 543 119 9ms 21 Nov 2025 659th eranws 542 119 10ms 23 Dec 2024 660th TaserTheFox 🇺🇸 539 120 17ms 8 Oct 2024 660th yokasuretsu 539 120 11ms 26 Jan 2025 660th Troon 539 120 11ms 17 Feb 2025 663rd Sciman101 539 147 2ms 26 Mar 2025 664th mousetail 🇳🇱 538 128 2ms 3 Oct 2024 665th BREMAUCY 🇫🇷 534 121 19ms 18 Jul 2025 666th msbranicky 534 175 162ms 13 Dec 2024 667th deancureton 533 121 11ms 30 Dec 2024 668th chartung17 530 122 10ms 24 Mar 2025 669th msbranicky 530 126 2,523ms 9 Jan 2025 670th Protothor 528 122 9ms 3 days ago 671st msbranicky 525 123 16ms 3 Oct 2024 671st bobbysq 525 123 11ms 5 Oct 2024 671st wuzekai518 525 123 10ms 8 Oct 2024 671st denkyuu1 525 123 17ms 2 days ago 675th dokutan 525 131 2ms 10 Feb 2026 676th Macweese 525 178 405ms 3 Aug 2025 677th galloj 🇨🇿 522 112 19ms 4 Oct 2024 678th NotEvenIndian 521 124 10ms 22 Oct 2024 678th ridingqwerty 🇺🇸 521 124 16ms 16 Jan 2025 678th CommandLeo 🇮🇹 521 124 10ms 5 Oct 2025 681st snoozingnewt 🇨🇦 520 213 138ms 2 Nov 2025 682nd bac0id 519 180 388ms 9 Jan 2025 683rd bnic24 517 125 16ms 3 Oct 2024 683rd adoxography 517 125 11ms 22 Oct 2024 683rd lelbal 517 125 10ms 14 Oct 2025 686th sidok 516 109 248ms 13 Nov 2024 687th dokutan 514 143 210ms 19 Oct 2024 688th denkyuu1 512 126 11ms 2 days ago 689th nephila-nacrea 🇬🇧 511 77 3ms 2 Oct 2024 690th emgordon154 511 156 9ms 13 Dec 2024 691st isaiah0311 🇺🇸 510 135 2ms 9 Feb 2026 692nd KatieLG 🇬🇧 510 140 436ms 1 Oct 2024 693rd yoshykai 510 183 374ms 12 Apr 2025 694th CatsAreFluffy 509 127 17ms 30 Oct 2024 694th WillowWispy 509 127 11ms 25 May 2025 696th Chinay-Domitrix 🇺🇸 509 131 2,347ms 30 Mar 2025 697th KatieLG 🇬🇧 509 146 9ms 2 Oct 2024 698th msbranicky 503 138 3ms 3 Oct 2024 699th snoozingnewt 🇨🇦 503 142 463ms 2 Nov 2025 700th madex 🇩🇪 501 129 16ms 2 Oct 2024 700th RedzGoose 🇦🇺 501 129 11ms 15 Oct 2024 700th calebaitken 501 129 10ms 11 Apr 2025 700th rollershutter 501 129 17ms 20 Nov 2025 704th blaztoma 🇱🇹 500 154 119ms 28 Nov 2025 705th MeWhenI 🇻🇦 499 149 56ms 4 Oct 2024 706th Europe2048 497 130 10ms 2 Oct 2024 706th nstearns96 🇬🇧 497 130 17ms 2 Oct 2024 706th Stockoh 🇫🇷 497 130 17ms 4 Jul 2025 709th denkyuu1 493 97 37ms 2 days ago 710th inverseLorentz 🇦🇺 493 131 11ms 7 Oct 2024 710th sciencejiho 493 131 17ms 11 Feb 2025 710th Jaydosu 493 131 11ms 11 Apr 2025 710th Emutis 🇱🇹 493 131 9ms 11 Nov 2025 714th CarterStroik 493 161 2ms 19 Nov 2025 715th TheRealOhead 🇺🇸 492 131 10ms 1 Oct 2024 716th HumanoidCPU 492 145 414ms 5 Oct 2024 717th h-hh-hhh 🇺🇦 491 177 66ms 2 Nov 2024 718th snoozingnewt 🇨🇦 491 249 26ms 2 Nov 2025 719th snoozingnewt 🇨🇦 490 150 228ms 2 Nov 2025 720th jlangvand 488 141 1ms 15 Oct 2024 First Prev 641–720 of 908 Next Last