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 xyangst 545 171 167ms 1 Oct 2024 642nd jtaxen 543 119 17ms 21 Oct 2024 642nd psbpsbp 543 119 10ms 19 Dec 2024 642nd klixel 🇨🇦 543 119 10ms 9 Apr 2025 642nd vhoulbreque 🇫🇷 543 119 9ms 21 Nov 2025 646th eranws 541 119 10ms 23 Dec 2024 647th TaserTheFox 🇺🇸 539 120 17ms 8 Oct 2024 647th yokasuretsu 539 120 11ms 26 Jan 2025 647th Troon 539 120 11ms 17 Feb 2025 650th Sciman101 539 147 2ms 26 Mar 2025 651st mousetail 🇳🇱 538 128 2ms 3 Oct 2024 652nd BREMAUCY 🇫🇷 534 121 19ms 18 Jul 2025 653rd msbranicky 533 175 165ms 13 Dec 2024 654th deancureton 532 121 10ms 30 Dec 2024 655th chartung17 530 122 10ms 24 Mar 2025 656th msbranicky 530 126 2,523ms 9 Jan 2025 657th msbranicky 525 123 16ms 3 Oct 2024 657th bobbysq 525 123 11ms 5 Oct 2024 657th wuzekai518 525 123 10ms 8 Oct 2024 660th dokutan 525 131 2ms 10 days ago 661st Macweese 525 178 405ms 3 Aug 2025 662nd galloj 🇨🇿 522 112 19ms 4 Oct 2024 663rd NotEvenIndian 521 124 10ms 22 Oct 2024 663rd ridingqwerty 🇺🇸 521 124 16ms 16 Jan 2025 663rd CommandLeo 🇮🇹 521 124 10ms 5 Oct 2025 666th snoozingnewt 🇨🇦 520 213 138ms 2 Nov 2025 667th bac0id 519 180 388ms 9 Jan 2025 668th bnic24 517 125 16ms 3 Oct 2024 668th adoxography 517 125 11ms 22 Oct 2024 668th lelbal 517 125 10ms 14 Oct 2025 671st sidok 515 109 248ms 13 Nov 2024 672nd dokutan 514 143 154ms 19 Oct 2024 673rd nephila-nacrea 🇬🇧 511 77 3ms 2 Oct 2024 674th emgordon154 511 156 8ms 13 Dec 2024 675th isaiah0311 🇺🇸 510 135 2ms 11 days ago 676th KatieLG 🇬🇧 510 140 436ms 1 Oct 2024 677th yoshykai 510 183 374ms 12 Apr 2025 678th CatsAreFluffy 509 127 17ms 30 Oct 2024 678th WillowWispy 509 127 11ms 25 May 2025 680th Chinay-Domitrix 🇺🇸 509 131 2,347ms 30 Mar 2025 681st KatieLG 🇬🇧 509 146 8ms 2 Oct 2024 682nd msbranicky 503 138 3ms 3 Oct 2024 683rd snoozingnewt 🇨🇦 503 142 463ms 2 Nov 2025 684th madex 🇩🇪 501 129 16ms 2 Oct 2024 684th RedzGoose 🇦🇺 501 129 11ms 15 Oct 2024 684th calebaitken 501 129 10ms 11 Apr 2025 684th rollershutter 501 129 17ms 20 Nov 2025 688th blaztoma 🇱🇹 500 154 109ms 28 Nov 2025 689th MeWhenI 🇻🇦 499 149 53ms 4 Oct 2024 690th janAkali 🇷🇺 499 167 357ms 8 Oct 2024 691st Europe2048 497 130 10ms 2 Oct 2024 691st nstearns96 🇬🇧 497 130 17ms 2 Oct 2024 691st Stockoh 🇫🇷 497 130 17ms 4 Jul 2025 694th inverseLorentz 🇦🇺 493 131 11ms 7 Oct 2024 694th sciencejiho 493 131 17ms 11 Feb 2025 694th Jaydosu 493 131 11ms 11 Apr 2025 694th Emutis 🇱🇹 493 131 9ms 11 Nov 2025 698th CarterStroik 493 161 2ms 19 Nov 2025 699th HumanoidCPU 492 145 414ms 5 Oct 2024 700th TheRealOhead 🇺🇸 491 131 11ms 1 Oct 2024 701st h-hh-hhh 🇺🇦 491 177 59ms 2 Nov 2024 702nd snoozingnewt 🇨🇦 490 150 154ms 2 Nov 2025 703rd jlangvand 488 141 1ms 15 Oct 2024 703rd HumanoidCPU 488 141 1ms 7 Mar 2025 705th snoozingnewt 🇨🇦 487 249 26ms 2 Nov 2025 706th snoozingnewt 🇨🇦 486 117 1,338ms 2 Nov 2025 707th Mabeloid 🇳🇴 486 133 11ms 2 Oct 2024 708th mitzal 483 180 61ms 9 Feb 2025 709th snoozingnewt 🇨🇦 482 173 332ms 2 Nov 2025 710th MiffOttah 476 150 446ms 6 Oct 2024 710th mwarvik 🇳🇴 476 150 439ms 1 Jan 2026 712th sciencedjinn 475 136 10ms 8 Nov 2024 712th ihatethefrench 475 136 18ms 4 Jan 2025 712th Florian-Mt 475 136 17ms 5 Dec 2025 715th alphafalfa 472 92 2ms 8 Nov 2024 716th kurkale6ka 472 137 22ms 16 Oct 2024 716th 4ndyJ 🇬🇧 472 137 11ms 14 Nov 2024 716th Mikey-Beep 🇬🇧 472 137 17ms 6 Aug 2025 716th wobblybits 472 137 19ms 17 Aug 2025 716th Andrey2001 472 137 9ms 19 days ago First Prev 641–720 of 889 Next Last