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 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 Chars Time Submitted 639th klixel 🇨🇦 543 119 11ms 9 Apr 2025 639th vhoulbreque 🇫🇷 543 119 10ms 21 Nov 2025 643rd eranws 541 119 12ms 23 Dec 2024 644th TaserTheFox 🇺🇸 539 120 17ms 8 Oct 2024 644th yokasuretsu 539 120 11ms 26 Jan 2025 644th Troon 539 120 11ms 17 Feb 2025 647th Sciman101 539 147 2ms 26 Mar 2025 648th mousetail 🇳🇱 538 128 2ms 3 Oct 2024 649th BREMAUCY 🇫🇷 534 121 24ms 18 Jul 2025 650th msbranicky 533 175 165ms 13 Dec 2024 651st deancureton 532 121 10ms 30 Dec 2024 652nd chartung17 530 122 10ms 24 Mar 2025 653rd msbranicky 530 126 2,523ms 9 Jan 2025 654th msbranicky 525 123 18ms 3 Oct 2024 654th bobbysq 525 123 11ms 5 Oct 2024 654th wuzekai518 525 123 10ms 8 Oct 2024 657th dokutan 525 131 2ms 6 days ago 658th Macweese 525 178 406ms 3 Aug 2025 659th galloj 🇨🇿 522 112 19ms 4 Oct 2024 660th NotEvenIndian 521 124 10ms 22 Oct 2024 660th ridingqwerty 🇺🇸 521 124 16ms 16 Jan 2025 660th CommandLeo 🇮🇹 521 124 11ms 5 Oct 2025 663rd snoozingnewt 🇨🇦 520 213 138ms 2 Nov 2025 664th bac0id 519 180 388ms 9 Jan 2025 665th bnic24 517 125 16ms 3 Oct 2024 665th adoxography 517 125 11ms 22 Oct 2024 665th lelbal 517 125 10ms 14 Oct 2025 668th sidok 515 109 248ms 13 Nov 2024 669th dokutan 514 143 154ms 19 Oct 2024 670th nephila-nacrea 🇬🇧 511 77 3ms 2 Oct 2024 671st emgordon154 511 156 8ms 13 Dec 2024 672nd isaiah0311 🇺🇸 510 135 2ms 7 days ago 673rd KatieLG 🇬🇧 510 140 440ms 1 Oct 2024 674th yoshykai 510 183 403ms 12 Apr 2025 675th CatsAreFluffy 509 127 18ms 30 Oct 2024 675th WillowWispy 509 127 11ms 25 May 2025 677th Chinay-Domitrix 🇺🇸 509 131 2,347ms 30 Mar 2025 678th KatieLG 🇬🇧 509 146 8ms 2 Oct 2024 679th snoozingnewt 🇨🇦 503 142 463ms 2 Nov 2025 680th madex 🇩🇪 501 129 17ms 2 Oct 2024 680th RedzGoose 🇦🇺 501 129 11ms 15 Oct 2024 680th calebaitken 501 129 11ms 11 Apr 2025 680th rollershutter 501 129 17ms 20 Nov 2025 684th msbranicky 501 138 3ms 3 Oct 2024 685th blaztoma 🇱🇹 500 154 109ms 28 Nov 2025 686th MeWhenI 🇻🇦 499 149 56ms 4 Oct 2024 687th janAkali 🇷🇺 499 167 357ms 8 Oct 2024 688th Europe2048 497 130 10ms 2 Oct 2024 688th nstearns96 🇬🇧 497 130 17ms 2 Oct 2024 688th Stockoh 🇫🇷 497 130 17ms 4 Jul 2025 691st inverseLorentz 🇦🇺 493 131 11ms 7 Oct 2024 691st sciencejiho 493 131 17ms 11 Feb 2025 691st Jaydosu 493 131 15ms 11 Apr 2025 691st Emutis 🇱🇹 493 131 9ms 11 Nov 2025 695th CarterStroik 493 161 2ms 19 Nov 2025 696th HumanoidCPU 492 145 479ms 5 Oct 2024 697th TheRealOhead 🇺🇸 491 131 10ms 1 Oct 2024 698th h-hh-hhh 🇺🇦 491 177 59ms 2 Nov 2024 699th snoozingnewt 🇨🇦 490 150 154ms 2 Nov 2025 700th jlangvand 488 141 2ms 15 Oct 2024 700th HumanoidCPU 488 141 1ms 7 Mar 2025 702nd snoozingnewt 🇨🇦 487 249 26ms 2 Nov 2025 703rd snoozingnewt 🇨🇦 486 117 1,338ms 2 Nov 2025 704th Mabeloid 🇳🇴 486 133 11ms 2 Oct 2024 705th mitzal 483 180 61ms 9 Feb 2025 706th snoozingnewt 🇨🇦 482 173 332ms 2 Nov 2025 707th MiffOttah 476 150 457ms 6 Oct 2024 707th mwarvik 🇳🇴 476 150 450ms 1 Jan 2026 709th sciencedjinn 475 136 11ms 8 Nov 2024 709th ihatethefrench 475 136 18ms 4 Jan 2025 709th Florian-Mt 475 136 17ms 5 Dec 2025 712th alphafalfa 472 92 2ms 8 Nov 2024 713th kurkale6ka 472 137 22ms 16 Oct 2024 713th 4ndyJ 🇬🇧 472 137 12ms 14 Nov 2024 713th Mikey-Beep 🇬🇧 472 137 17ms 6 Aug 2025 713th wobblybits 472 137 19ms 17 Aug 2025 713th Andrey2001 472 137 10ms 15 days ago 718th luca1339 472 198 425ms 4 Nov 2024 719th ejini6969 469 102 37ms 14 Jun 2025 720th h-hh-hhh 🇺🇦 468 147 2ms 2 Nov 2024 First Prev 641–720 of 885 Next Last