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 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 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 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 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 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 Turtle Tutorial # Golfer Points Bytes Time Submitted 673rd feherd 531 150 10ms 31 Oct 2024 673rd kadamkaustubh 531 150 10ms 25 days ago 678th msbranicky 527 126 2,869ms 9 Jan 2025 679th adamnielson42 🇺🇸 524 152 10ms 6 Oct 2024 679th voidgloom 524 152 10ms 22 Oct 2024 679th omero-san 524 152 10ms 22 Sep 2025 679th brochmann 🇸🇪 524 152 10ms 12 Oct 2025 683rd Macweese 524 178 308ms 3 Aug 2025 684th galloj 🇨🇿 522 112 27ms 4 Oct 2024 685th xyangst 521 153 9ms 1 Oct 2024 685th denisfouchard 521 153 10ms 21 Aug 2025 687th blaztoma 🇱🇹 519 154 107ms 4 days ago 688th snoozingnewt 🇺🇸 519 213 119ms 2 Nov 2025 689th bac0id 518 180 306ms 9 Jan 2025 690th osNiko 🇧🇷 517 154 10ms 21 Aug 2025 691st sidok 515 109 247ms 13 Nov 2024 692nd robin-scragg 514 155 9ms 21 Aug 2025 692nd celiendonze 🇨🇭 514 155 10ms 17 Oct 2025 694th dokutan 512 143 128ms 19 Oct 2024 695th travisdoesmath 511 156 9ms 7 Sep 2025 695th Shotokhan 511 156 9ms 21 Sep 2025 697th nephila-nacrea 🇬🇧 510 77 4ms 2 Oct 2024 698th yoshykai 510 183 309ms 12 Apr 2025 699th KatieLG 🇬🇧 509 140 358ms 1 Oct 2024 700th KatieLG 🇬🇧 509 146 7ms 2 Oct 2024 701st dokutan 507 126 134ms 22 Jun 2025 702nd Chinay-Domitrix 🇺🇸 507 131 2,930ms 30 Mar 2025 703rd lhulinsky 507 157 10ms 21 Oct 2024 704th dokutan 506 116 726ms 30 Aug 2025 705th ThatAlo 504 158 11ms 9 Dec 2024 706th TheZwierzLF 🇵🇱 502 132 547ms 8 days ago 706th Andrey2001 502 132 710ms 5 days ago 708th msbranicky 501 138 3ms 3 Oct 2024 709th snoozingnewt 🇺🇸 501 142 379ms 2 Nov 2025 710th webmiche 501 159 11ms 3 Nov 2025 711th jlangvand 499 141 1ms 15 Oct 2024 711th HumanoidCPU 499 141 2ms 7 Mar 2025 713th MeWhenI 🇻🇦 499 149 42ms 4 Oct 2024 714th janAkali 🇷🇺 499 167 335ms 8 Oct 2024 715th Mabeloid 🇳🇴 498 133 512ms 2 Oct 2024 716th CheeseCake628 🇳🇴 498 160 100ms 5 Nov 2024 717th pres-abhisheksinha 495 161 11ms 8 Oct 2024 718th StronkCheese2 493 161 2ms 14 days ago 719th ibixina 492 162 9ms 13 Oct 2024 719th TheAtrossian 492 162 10ms 5 Jan 2025 721st TheRealOhead 🇺🇸 491 131 9ms 1 Oct 2024 722nd HumanoidCPU 491 145 388ms 5 Oct 2024 723rd snoozingnewt 🇺🇸 488 150 135ms 2 Nov 2025 724th JunkIce 487 136 518ms 3 Dec 2024 725th snoozingnewt 🇺🇸 486 117 940ms 2 Nov 2025 726th h-hh-hhh 🇺🇦 485 177 58ms 2 Nov 2024 727th Vaekor 483 165 12ms 15 Dec 2024 728th snoozingnewt 🇺🇸 483 249 27ms 2 Nov 2025 729th snoozingnewt 🇺🇸 482 173 353ms 2 Nov 2025 730th alphafalfa 480 92 2ms 8 Nov 2024 731st h-hh-hhh 🇺🇦 478 147 2ms 2 Nov 2024 732nd ravnskjaer 🇩🇰 478 195 306ms 20 Dec 2024 732nd snoozingnewt 🇺🇸 478 195 370ms 2 Nov 2025 734th mitzal 477 180 58ms 9 Feb 2025 735th MiffOttah 475 150 369ms 6 Oct 2024 736th JesseNoEyes 🇺🇸 471 169 9ms 1 Oct 2024 737th luca1339 471 198 302ms 4 Nov 2024 738th Maximizer02 471 201 10ms 1 Oct 2024 739th iczelia 🇩🇪 470 94 3ms 23 Sep 2025 740th zyc-2024 🇨🇳 469 170 10ms 5 Oct 2024 741st ejini6969 468 102 35ms 14 Jun 2025 742nd ComputerKWasTaken 🇺🇸 466 171 9ms 14 Oct 2024 743rd snoozingnewt 🇺🇸 466 200 225ms 2 Nov 2025 744th snoozingnewt 🇺🇸 464 121 206ms 6 days ago 745th Jacob385 462 202 298ms 2 Oct 2024 746th snoozingnewt 🇺🇸 460 96 2ms 2 Nov 2025 747th navier-1 460 173 9ms 22 Sep 2025 748th madex 🇩🇪 459 104 36ms 2 Oct 2024 749th snoozingnewt 🇺🇸 454 149 5ms 2 Nov 2025 750th IISResetMe 453 103 460ms 6 days ago First Prev 676–750 of 835 Next Last