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 641st mousetail 🇳🇱 538 128 2ms 3 Oct 2024 642nd BREMAUCY 🇫🇷 534 121 24ms 18 Jul 2025 643rd msbranicky 533 175 164ms 13 Dec 2024 644th deancureton 532 121 12ms 30 Dec 2024 645th chartung17 530 122 10ms 24 Mar 2025 646th msbranicky 530 126 2,523ms 9 Jan 2025 647th msbranicky 525 123 18ms 3 Oct 2024 647th bobbysq 525 123 11ms 5 Oct 2024 647th wuzekai518 525 123 10ms 8 Oct 2024 650th dokutan 525 131 2ms 2 hours ago 651st Macweese 525 178 406ms 3 Aug 2025 652nd galloj 🇨🇿 522 112 19ms 4 Oct 2024 653rd NotEvenIndian 521 124 10ms 22 Oct 2024 653rd ridingqwerty 🇺🇸 521 124 16ms 16 Jan 2025 653rd CommandLeo 🇮🇹 521 124 11ms 5 Oct 2025 656th snoozingnewt 🇨🇦 520 213 138ms 2 Nov 2025 657th bac0id 519 180 388ms 9 Jan 2025 658th bnic24 517 125 16ms 3 Oct 2024 658th adoxography 517 125 11ms 22 Oct 2024 658th lelbal 517 125 10ms 14 Oct 2025 661st sidok 515 109 239ms 13 Nov 2024 662nd dokutan 514 143 154ms 19 Oct 2024 663rd nephila-nacrea 🇬🇧 511 77 3ms 2 Oct 2024 664th emgordon154 511 156 8ms 13 Dec 2024 665th isaiah0311 🇺🇸 510 135 2ms 40 hours ago 666th KatieLG 🇬🇧 510 140 440ms 1 Oct 2024 667th yoshykai 510 183 403ms 12 Apr 2025 668th CatsAreFluffy 509 127 18ms 30 Oct 2024 668th WillowWispy 509 127 11ms 25 May 2025 670th Chinay-Domitrix 🇺🇸 509 131 2,347ms 30 Mar 2025 671st KatieLG 🇬🇧 509 146 8ms 2 Oct 2024 672nd snoozingnewt 🇨🇦 503 142 463ms 2 Nov 2025 673rd madex 🇩🇪 501 129 17ms 2 Oct 2024 673rd RedzGoose 🇦🇺 501 129 11ms 15 Oct 2024 673rd calebaitken 501 129 11ms 11 Apr 2025 673rd rollershutter 501 129 17ms 20 Nov 2025 677th msbranicky 501 138 3ms 3 Oct 2024 678th blaztoma 🇱🇹 500 154 109ms 28 Nov 2025 679th MeWhenI 🇻🇦 499 149 56ms 4 Oct 2024 680th janAkali 🇷🇺 499 167 357ms 8 Oct 2024 681st Europe2048 497 130 10ms 2 Oct 2024 681st nstearns96 🇬🇧 497 130 17ms 2 Oct 2024 681st Stockoh 🇫🇷 497 130 17ms 4 Jul 2025 684th inverseLorentz 🇦🇺 493 131 11ms 7 Oct 2024 684th sciencejiho 493 131 17ms 11 Feb 2025 684th Jaydosu 493 131 15ms 11 Apr 2025 684th Emutis 🇱🇹 493 131 9ms 11 Nov 2025 688th CarterStroik 493 161 2ms 19 Nov 2025 689th HumanoidCPU 492 145 479ms 5 Oct 2024 690th TheRealOhead 🇺🇸 491 131 14ms 1 Oct 2024 691st h-hh-hhh 🇺🇦 491 177 59ms 2 Nov 2024 692nd snoozingnewt 🇨🇦 490 150 154ms 2 Nov 2025 693rd jlangvand 488 141 2ms 15 Oct 2024 693rd HumanoidCPU 488 141 1ms 7 Mar 2025 695th snoozingnewt 🇨🇦 487 249 26ms 2 Nov 2025 696th snoozingnewt 🇨🇦 486 117 1,338ms 2 Nov 2025 697th Mabeloid 🇳🇴 486 133 11ms 2 Oct 2024 698th mitzal 483 180 61ms 9 Feb 2025 699th snoozingnewt 🇨🇦 482 173 332ms 2 Nov 2025 700th KatieLG 🇬🇧 479 120 490ms 1 Oct 2024 701st MiffOttah 476 150 457ms 6 Oct 2024 701st mwarvik 🇳🇴 476 150 450ms 1 Jan 2026 703rd sciencedjinn 475 136 11ms 8 Nov 2024 703rd ihatethefrench 475 136 18ms 4 Jan 2025 703rd Florian-Mt 475 136 17ms 5 Dec 2025 706th alphafalfa 472 92 2ms 8 Nov 2024 707th kurkale6ka 472 137 22ms 16 Oct 2024 707th 4ndyJ 🇬🇧 472 137 12ms 14 Nov 2024 707th Mikey-Beep 🇬🇧 472 137 17ms 6 Aug 2025 707th wobblybits 472 137 19ms 17 Aug 2025 707th Andrey2001 472 137 10ms 9 days ago 712th luca1339 472 198 425ms 4 Nov 2024 713th ejini6969 469 102 37ms 14 Jun 2025 714th h-hh-hhh 🇺🇦 468 147 2ms 2 Nov 2024 715th snoozingnewt 🇨🇦 466 200 216ms 2 Nov 2025 716th scpchicken 🇵🇼 465 139 17ms 6 Oct 2024 716th tomh1012 465 139 19ms 25 days ago 718th snoozingnewt 🇨🇦 464 121 197ms 27 Nov 2025 719th iczelia 🇩🇪 462 94 2ms 23 Sep 2025 720th NanduBC 462 140 13ms 1 Oct 2024 First Prev 641–720 of 880 Next Last