Card Number Validation in all languages in bytes. 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 Gray Code Decoder Gray Code Encoder 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) Taxicab Numbers 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 Dragon Curve Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers Huffman Encoder NFA Simulator Nim Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic 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 Gray Code Decoder Gray Code Encoder 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) Taxicab Numbers 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 Dragon Curve Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers Huffman Encoder NFA Simulator Nim Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 601st Jonatan6 🇩🇰 643 110 2ms 24 Oct 2024 602nd NotEvenIndian 643 124 14ms 22 Oct 2024 602nd ridingqwerty 🇺🇸 643 124 20ms 16 Jan 2025 602nd CommandLeo 🇮🇹 643 124 11ms 5 Oct 2025 602nd JOrE20 643 124 18ms 21 Feb 2026 606th elgan65536 🇺🇸 642 146 169ms 2 Oct 2024 606th luuumine 🇫🇷 642 146 153ms 26 Nov 2025 608th stefangimmillaro 641 73 324ms 1 Oct 2024 609th dokutan 640 146 453ms 23 Nov 2025 610th MeWhenI 🇻🇦 638 73 7ms 3 Oct 2024 611th bnic24 638 125 18ms 3 Oct 2024 611th adoxography 638 125 10ms 22 Oct 2024 611th wh3n3v3r 🇨🇿 638 125 11ms 18 Nov 2024 611th lelbal 638 125 10ms 14 Oct 2025 615th emgordon154 636 111 4ms 12 Jan 2025 616th MeWhenI 🇻🇦 634 91 750ms 29 Aug 2025 617th msbranicky 634 188 328ms 7 Jan 2025 618th Shanethegamer 🇺🇸 632 74 290ms 16 Oct 2024 619th XenThe 🇬🇧 632 102 10ms 7 Jul 2025 619th Florian-Mt 632 102 11ms 5 Dec 2025 621st KatieLG 🇬🇧 632 105 635ms 11 Feb 2026 622nd CatsAreFluffy 628 127 17ms 30 Oct 2024 622nd WillowWispy 628 127 11ms 25 May 2025 624th DialFrost 🇸🇬 627 304 153ms 13 Aug 2025 625th not-a-pokemon 626 113 1ms 23 Jul 2025 626th AlephSquirrel 625 40 47ms 1 Oct 2024 627th dokutan 624 127 2ms 10 Dec 2024 628th jupj 🇫🇮 621 114 2ms 20 Jul 2025 629th BalaM314 620 104 12ms 4 Feb 2025 629th acollett89 620 104 11ms 15 Jul 2025 631st HumanoidCPU 620 107 486ms 17 Feb 2025 632nd Ripick 620 135 390ms 23 Mar 2025 633rd madex 🇩🇪 619 129 21ms 2 Oct 2024 633rd RedzGoose 🇦🇺 619 129 11ms 15 Oct 2024 633rd calebaitken 619 129 10ms 11 Apr 2025 633rd rollershutter 619 129 19ms 20 Nov 2025 637th MarcMush 🇫🇷 618 91 830ms 8 Oct 2024 638th bac0id 616 141 426ms 10 Jan 2025 639th Europe2048 614 130 11ms 2 Oct 2024 639th nstearns96 🇬🇧 614 130 17ms 2 Oct 2024 639th Stockoh 🇫🇷 614 130 17ms 4 Jul 2025 642nd Seanharrs 🇦🇺 613 117 454ms 15 Nov 2024 643rd evnu 612 147 87ms 12 Oct 2025 644th vang1ong7ang 🇦🇶 610 41 45ms 6 days ago 645th inverseLorentz 🇦🇺 609 131 12ms 7 Oct 2024 645th sciencejiho 609 131 24ms 11 Feb 2025 645th Jaydosu 609 131 11ms 11 Apr 2025 645th Emutis 🇱🇹 609 131 10ms 11 Nov 2025 645th samnak2 609 131 11ms 21 hours ago 645th Mikey-Beep 🇬🇧 609 131 18ms 9 hours ago 651st kaascevich 609 134 126ms 9 Jul 2025 652nd Shanethegamer 🇺🇸 609 154 153ms 3 Oct 2024 653rd HumanoidCPU 608 106 12ms 7 Mar 2025 653rd daveberlin 608 106 10ms 27 Jun 2025 655th MeWhenI 🇻🇦 607 111 91ms 2 Oct 2024 656th emgordon154 606 156 9ms 13 Dec 2024 657th alemelis 605 93 468ms 1 Oct 2024 658th roguh 🇬🇹 605 117 1ms 13 Oct 2024 658th iczelia 🇩🇪 605 117 2ms 25 Sep 2025 660th albanian-laundromat 🇺🇸 604 72 1ms 25 Feb 2026 661st sultan 604 132 17ms 16 days ago 662nd dokutan 600 116 2ms 19 Nov 2025 663rd Mabeloid 🇳🇴 600 133 10ms 2 Oct 2024 664th MeWhenI 🇻🇦 597 98 8ms 1 Oct 2024 665th tomh1012 597 108 11ms 12 Mar 2026 666th arcpolaris 597 120 433ms 28 Jan 2025 667th MeWhenI 🇻🇦 596 73 2ms 2 Oct 2024 668th SirBogman 🇺🇸 595 64 153ms 11 Jul 2025 669th bac0id 595 119 2ms 10 Jan 2025 670th dokutan 595 159 6ms 19 Oct 2024 671st tatzyr 🇯🇵 591 81 35ms 23 Dec 2024 672nd RaBa21 🇭🇺 591 135 17ms 19 Jul 2025 673rd DialFrost 🇸🇬 590 67 8ms 25 Jan 2025 674th amazingalek 🇳🇴 588 122 501ms 1 Jan 2026 675th MeWhenI 🇻🇦 588 324 17ms 41 hours ago 676th sciencedjinn 587 136 10ms 8 Nov 2024 676th mchalunderscore 587 136 20ms 4 Jan 2025 676th Florian-Mt 587 136 17ms 5 Dec 2025 679th Schmitt-Very-Cool 587 159 506ms 26 Sep 2025 680th dokutan 587 174 5ms 21 Feb 2025 681st gigaprofisi 🇺🇸 586 110 12ms 11 Aug 2025 681st denkyuu1 586 110 11ms 26 days ago 681st RealBen9 🇬🇧 586 110 10ms 14 days ago 684th Mabeloid 🇳🇴 585 121 1ms 21 Oct 2025 685th olleicua 🇺🇸 584 82 37ms 18 Oct 2024 686th michelebastione 🇮🇹 583 123 483ms 26 Aug 2025 686th matanberstadt 583 123 442ms 18 days ago 688th kurkale6ka 582 137 29ms 16 Oct 2024 688th 4ndyJ 🇬🇧 582 137 12ms 14 Nov 2024 688th wobblybits 582 137 18ms 17 Aug 2025 688th Andrey2001 582 137 16ms 1 Feb 2026 688th tomh1012 582 137 18ms 4 Mar 2026 688th Aquateraneal 🇺🇸 582 137 18ms 8 Mar 2026 694th emgordon154 579 49 3ms 9 Dec 2025 695th 823126 576 112 11ms 13 Nov 2024 695th dokutan 576 112 11ms 22 Jun 2025 695th snoozingnewt 🇨🇦 576 112 11ms 2 Nov 2025 698th jgbaldwinbrown 575 123 2ms 14 Jan 2026 699th KatieLG 🇬🇧 574 99 1,394ms 1 Oct 2024 700th MeWhenI 🇻🇦 572 164 196ms 6 Oct 2024 First Prev 601–700 of 951 Next Last