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 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 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 Calendar 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 Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Tower of Hanoi 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 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 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 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 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 Calendar 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 Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Tower of Hanoi Turtle Tutorial # Golfer Points Bytes Time Submitted 675th voidgloom 524 152 10ms 22 Oct 2024 675th omero-san 524 152 9ms 22 Sep 2025 675th brochmann 🇸🇪 524 152 10ms 12 Oct 2025 679th Macweese 524 178 308ms 3 Aug 2025 680th galloj 🇨🇿 522 112 27ms 4 Oct 2024 681st xyangst 521 153 10ms 1 Oct 2024 681st denisfouchard 521 153 11ms 21 Aug 2025 683rd snoozingnewt 🇺🇸 519 213 119ms 25 days ago 684th bac0id 518 180 306ms 9 Jan 2025 685th osNiko 🇧🇷 517 154 22ms 21 Aug 2025 686th sidok 515 109 247ms 13 Nov 2024 687th FortuiteMan 🇫🇷 514 155 16ms 16 Oct 2024 687th robin-scragg 514 155 13ms 21 Aug 2025 687th celiendonze 🇨🇭 514 155 11ms 17 Oct 2025 690th dokutan 512 143 128ms 19 Oct 2024 691st travisdoesmath 511 156 10ms 7 Sep 2025 691st Shotokhan 511 156 9ms 21 Sep 2025 693rd nephila-nacrea 🇬🇧 510 77 4ms 2 Oct 2024 694th yoshykai 510 183 309ms 12 Apr 2025 695th KatieLG 🇬🇧 509 140 358ms 1 Oct 2024 696th KatieLG 🇬🇧 509 146 7ms 2 Oct 2024 697th dokutan 507 126 134ms 22 Jun 2025 698th Chinay-Domitrix 🇺🇸 507 131 2,930ms 30 Mar 2025 699th lhulinsky 507 157 10ms 21 Oct 2024 700th dokutan 506 116 726ms 30 Aug 2025 701st ThatAlo 504 158 10ms 9 Dec 2024 702nd TheZwierzLF 🇵🇱 502 132 448ms 3 days ago 702nd Andrey2001 502 132 1,530ms 16 hours ago 704th msbranicky 501 138 3ms 3 Oct 2024 705th snoozingnewt 🇺🇸 501 142 379ms 25 days ago 706th webmiche 501 159 10ms 24 days ago 707th jlangvand 499 141 1ms 15 Oct 2024 707th HumanoidCPU 499 141 2ms 7 Mar 2025 709th MeWhenI 🇻🇦 499 149 42ms 4 Oct 2024 710th janAkali 🇷🇺 499 167 335ms 8 Oct 2024 711th Mabeloid 🇳🇴 498 133 549ms 2 Oct 2024 712th CheeseCake628 🇳🇴 498 160 99ms 5 Nov 2024 713th pres-abhisheksinha 495 161 9ms 8 Oct 2024 714th StronkCheese2 493 161 2ms 9 days ago 715th ibixina 492 162 10ms 13 Oct 2024 715th TheAtrossian 492 162 10ms 5 Jan 2025 717th TheRealOhead 🇺🇸 491 131 9ms 1 Oct 2024 718th HumanoidCPU 491 145 388ms 5 Oct 2024 719th snoozingnewt 🇺🇸 488 150 135ms 25 days ago 720th JunkIce 487 136 560ms 3 Dec 2024 721st snoozingnewt 🇺🇸 486 117 940ms 25 days ago 722nd h-hh-hhh 🇺🇦 485 177 58ms 2 Nov 2024 723rd Vaekor 483 165 9ms 15 Dec 2024 724th snoozingnewt 🇺🇸 483 249 27ms 25 days ago 725th snoozingnewt 🇺🇸 482 173 353ms 25 days ago 726th alphafalfa 480 92 2ms 8 Nov 2024 727th h-hh-hhh 🇺🇦 478 147 2ms 2 Nov 2024 728th ravnskjaer 🇩🇰 478 195 306ms 20 Dec 2024 728th snoozingnewt 🇺🇸 478 195 370ms 25 days ago 730th mitzal 477 180 58ms 9 Feb 2025 731st MiffOttah 475 150 369ms 6 Oct 2024 732nd JesseNoEyes 🇺🇸 471 169 10ms 1 Oct 2024 733rd luca1339 471 198 302ms 4 Nov 2024 734th Maximizer02 471 201 10ms 1 Oct 2024 735th iczelia 🇩🇪 470 94 3ms 23 Sep 2025 736th ejini6969 468 102 35ms 14 Jun 2025 737th zyc-2024 🇨🇳 468 170 10ms 5 Oct 2024 738th ComputerKWasTaken 🇺🇸 466 171 9ms 14 Oct 2024 739th snoozingnewt 🇺🇸 466 200 230ms 25 days ago 740th snoozingnewt 🇺🇸 464 121 206ms 29 hours ago 741st Jacob385 462 202 298ms 2 Oct 2024 742nd snoozingnewt 🇺🇸 460 96 2ms 25 days ago 743rd navier-1 460 173 10ms 22 Sep 2025 744th madex 🇩🇪 459 104 36ms 2 Oct 2024 745th snoozingnewt 🇺🇸 454 149 5ms 25 days ago 746th IISResetMe 453 103 460ms 23 hours ago 747th clayboll99 453 176 11ms 10 Jul 2025 748th dokutan 451 63 3ms 26 Nov 2024 749th snoozingnewt 🇺🇸 451 176 2ms 25 days ago 750th Upload-and-View 🇺🇦 450 177 16ms 9 Aug 2025 First Prev 676–750 of 831 Next Last