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 Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript 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 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 ArkScript 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 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 Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 641st msbranicky 552 185 4ms 20 Jan 2025 642nd edsrzf 🇳🇿 551 135 6ms 27 Feb 2025 643rd gpikmddk 549 130 417ms 30 Oct 2025 644th ethanlally 549 170 377ms 19 Nov 2025 644th snoozingnewt 🇨🇦 549 170 485ms 5 Dec 2025 646th KatieLG 🇬🇧 548 105 439ms 11 Feb 2026 647th elgan65536 🇺🇸 548 118 12ms 2 Oct 2024 647th logvp 548 118 17ms 6 Oct 2024 647th ahmetdemirag 🇨🇾 548 118 10ms 6 Feb 2025 647th dirckvdende 548 118 17ms 10 Jul 2025 651st zakariamouhid 546 118 10ms 1 Oct 2024 652nd xyangst 546 171 178ms 1 Oct 2024 652nd kmathis22 546 171 350ms 19 Nov 2025 654th najs91 545 131 391ms 15 Oct 2024 654th bac0id 545 131 422ms 9 Jan 2025 654th CaedenHarper 🇨🇦 545 131 370ms 17 Oct 2025 657th jtaxen 543 119 17ms 21 Oct 2024 657th psbpsbp 543 119 10ms 19 Dec 2024 657th klixel 🇨🇦 543 119 10ms 9 Apr 2025 657th vhoulbreque 🇫🇷 543 119 9ms 21 Nov 2025 661st eranws 542 119 9ms 23 Dec 2024 662nd TaserTheFox 🇺🇸 539 120 17ms 8 Oct 2024 662nd yokasuretsu 539 120 11ms 26 Jan 2025 662nd Troon 539 120 11ms 17 Feb 2025 665th Sciman101 539 147 2ms 26 Mar 2025 666th mousetail 🇳🇱 538 128 2ms 3 Oct 2024 667th BREMAUCY 🇫🇷 534 121 19ms 18 Jul 2025 668th msbranicky 534 175 162ms 13 Dec 2024 669th deancureton 533 121 10ms 30 Dec 2024 670th chartung17 530 122 10ms 24 Mar 2025 671st msbranicky 530 126 2,655ms 9 Jan 2025 672nd Protothor 528 122 17ms 10 days ago 673rd msbranicky 525 123 16ms 3 Oct 2024 673rd bobbysq 525 123 11ms 5 Oct 2024 673rd wuzekai518 525 123 10ms 8 Oct 2024 673rd denkyuu1 525 123 17ms 10 days ago 677th dokutan 525 131 2ms 10 Feb 2026 678th Macweese 525 178 405ms 3 Aug 2025 679th galloj 🇨🇿 522 112 19ms 4 Oct 2024 680th NotEvenIndian 521 124 10ms 22 Oct 2024 680th ridingqwerty 🇺🇸 521 124 16ms 16 Jan 2025 680th CommandLeo 🇮🇹 521 124 10ms 5 Oct 2025 683rd snoozingnewt 🇨🇦 520 213 138ms 2 Nov 2025 684th bac0id 519 180 388ms 9 Jan 2025 685th bnic24 517 125 16ms 3 Oct 2024 685th adoxography 517 125 11ms 22 Oct 2024 685th lelbal 517 125 10ms 14 Oct 2025 688th sidok 516 109 248ms 13 Nov 2024 689th dokutan 514 143 210ms 19 Oct 2024 690th nephila-nacrea 🇬🇧 511 77 3ms 2 Oct 2024 691st emgordon154 511 156 8ms 13 Dec 2024 692nd isaiah0311 🇺🇸 510 135 2ms 9 Feb 2026 693rd KatieLG 🇬🇧 510 140 361ms 1 Oct 2024 694th yoshykai 510 183 374ms 12 Apr 2025 695th CatsAreFluffy 509 127 17ms 30 Oct 2024 695th WillowWispy 509 127 11ms 25 May 2025 697th Chinay-Domitrix 🇺🇸 509 131 2,759ms 30 Mar 2025 698th KatieLG 🇬🇧 509 146 9ms 2 Oct 2024 699th msbranicky 503 138 3ms 3 Oct 2024 700th snoozingnewt 🇨🇦 503 142 436ms 2 Nov 2025 701st madex 🇩🇪 501 129 16ms 2 Oct 2024 701st RedzGoose 🇦🇺 501 129 11ms 15 Oct 2024 701st calebaitken 501 129 10ms 11 Apr 2025 701st rollershutter 501 129 17ms 20 Nov 2025 705th blaztoma 🇱🇹 500 154 119ms 28 Nov 2025 706th MeWhenI 🇻🇦 499 149 56ms 4 Oct 2024 707th Europe2048 497 130 10ms 2 Oct 2024 707th nstearns96 🇬🇧 497 130 17ms 2 Oct 2024 707th Stockoh 🇫🇷 497 130 17ms 4 Jul 2025 710th denkyuu1 493 97 37ms 10 days ago 711th inverseLorentz 🇦🇺 493 131 11ms 7 Oct 2024 711th sciencejiho 493 131 17ms 11 Feb 2025 711th Jaydosu 493 131 11ms 11 Apr 2025 711th Emutis 🇱🇹 493 131 9ms 11 Nov 2025 715th CarterStroik 493 161 2ms 19 Nov 2025 716th TheRealOhead 🇺🇸 492 131 16ms 1 Oct 2024 717th HumanoidCPU 492 145 480ms 5 Oct 2024 718th h-hh-hhh 🇺🇦 491 177 64ms 2 Nov 2024 719th snoozingnewt 🇨🇦 491 249 26ms 2 Nov 2025 720th snoozingnewt 🇨🇦 490 150 219ms 2 Nov 2025 First Prev 641–720 of 908 Next Last