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 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 Multitap Input 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 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 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 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 Multitap Input 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 msbranicky 525 123 17ms 3 Oct 2024 641st bobbysq 525 123 10ms 5 Oct 2024 641st wuzekai518 525 123 10ms 8 Oct 2024 644th Macweese 525 178 382ms 3 Aug 2025 645th galloj 🇨🇿 522 112 19ms 4 Oct 2024 646th NotEvenIndian 521 124 10ms 22 Oct 2024 646th ridingqwerty 🇺🇸 521 124 16ms 16 Jan 2025 646th CommandLeo 🇮🇹 521 124 9ms 5 Oct 2025 649th snoozingnewt 🇨🇦 520 213 138ms 2 Nov 2025 650th bac0id 519 180 370ms 9 Jan 2025 651st bnic24 517 125 16ms 3 Oct 2024 651st adoxography 517 125 11ms 22 Oct 2024 651st lelbal 517 125 9ms 14 Oct 2025 654th sidok 515 109 239ms 13 Nov 2024 655th dokutan 514 143 154ms 19 Oct 2024 656th nephila-nacrea 🇬🇧 511 77 3ms 2 Oct 2024 657th emgordon154 511 156 8ms 13 Dec 2024 658th KatieLG 🇬🇧 510 140 440ms 1 Oct 2024 659th yoshykai 510 183 364ms 12 Apr 2025 660th CatsAreFluffy 509 127 15ms 30 Oct 2024 660th WillowWispy 509 127 10ms 25 May 2025 662nd Chinay-Domitrix 🇺🇸 509 131 4,591ms 30 Mar 2025 663rd KatieLG 🇬🇧 509 146 8ms 2 Oct 2024 664th snoozingnewt 🇨🇦 503 142 463ms 2 Nov 2025 665th madex 🇩🇪 501 129 16ms 2 Oct 2024 665th RedzGoose 🇦🇺 501 129 13ms 15 Oct 2024 665th calebaitken 501 129 9ms 11 Apr 2025 665th rollershutter 501 129 17ms 20 Nov 2025 669th msbranicky 501 138 3ms 3 Oct 2024 670th blaztoma 🇱🇹 500 154 109ms 28 Nov 2025 671st MeWhenI 🇻🇦 499 149 56ms 4 Oct 2024 672nd janAkali 🇷🇺 499 167 357ms 8 Oct 2024 673rd Europe2048 497 130 9ms 2 Oct 2024 673rd nstearns96 🇬🇧 497 130 16ms 2 Oct 2024 673rd Stockoh 🇫🇷 497 130 16ms 4 Jul 2025 676th inverseLorentz 🇦🇺 493 131 9ms 7 Oct 2024 676th sciencejiho 493 131 16ms 11 Feb 2025 676th Jaydosu 493 131 9ms 11 Apr 2025 676th Emutis 🇱🇹 493 131 9ms 11 Nov 2025 680th HumanoidCPU 492 145 479ms 5 Oct 2024 681st CarterStroik 492 161 2ms 19 Nov 2025 682nd TheRealOhead 🇺🇸 491 131 10ms 1 Oct 2024 683rd snoozingnewt 🇨🇦 490 150 154ms 2 Nov 2025 684th h-hh-hhh 🇺🇦 488 177 59ms 2 Nov 2024 685th jlangvand 487 141 2ms 15 Oct 2024 685th HumanoidCPU 487 141 1ms 7 Mar 2025 687th snoozingnewt 🇨🇦 487 249 26ms 2 Nov 2025 688th snoozingnewt 🇨🇦 486 117 1,313ms 2 Nov 2025 689th Mabeloid 🇳🇴 486 133 9ms 2 Oct 2024 690th snoozingnewt 🇨🇦 482 173 332ms 2 Nov 2025 691st alphafalfa 480 92 2ms 8 Nov 2024 692nd mitzal 480 180 61ms 9 Feb 2025 693rd KatieLG 🇬🇧 479 120 413ms 1 Oct 2024 694th MiffOttah 476 150 457ms 6 Oct 2024 694th mwarvik 🇳🇴 476 150 450ms 20 days ago 696th sciencedjinn 475 136 9ms 8 Nov 2024 696th ihatethefrench 475 136 16ms 4 Jan 2025 696th Florian-Mt 475 136 19ms 5 Dec 2025 699th kurkale6ka 472 137 21ms 16 Oct 2024 699th 4ndyJ 🇬🇧 472 137 10ms 14 Nov 2024 699th Mikey-Beep 🇬🇧 472 137 16ms 6 Aug 2025 699th wobblybits 472 137 15ms 17 Aug 2025 703rd luca1339 472 198 371ms 4 Nov 2024 704th iczelia 🇩🇪 470 94 2ms 23 Sep 2025 705th ejini6969 469 102 37ms 14 Jun 2025 706th h-hh-hhh 🇺🇦 467 147 2ms 2 Nov 2024 707th snoozingnewt 🇨🇦 466 200 228ms 2 Nov 2025 708th scpchicken 🇵🇼 465 139 16ms 6 Oct 2024 708th tomh1012 465 139 17ms 5 days ago 710th snoozingnewt 🇨🇦 464 121 197ms 27 Nov 2025 711th Jacob385 462 202 358ms 2 Oct 2024 712th NanduBC 461 140 10ms 1 Oct 2024 712th jmerle 🇳🇱 461 140 10ms 10 Jan 2025 712th RobertHoeh 461 140 9ms 3 Mar 2025 712th smilesformiles3 461 140 15ms 12 Jun 2025 712th artem-aramma 461 140 18ms 18 Jun 2025 712th Andrey2001 461 140 10ms 27 Nov 2025 718th snoozingnewt 🇨🇦 460 96 2ms 2 Nov 2025 719th madex 🇩🇪 460 104 38ms 2 Oct 2024 720th FranklinJiaChen 458 141 13ms 2 Oct 2024 First Prev 641–720 of 863 Next Last