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 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 Bytes Time Submitted 721st ThatAlo 504 158 10ms 9 Dec 2024 722nd snoozingnewt 🇨🇦 503 142 407ms 2 Nov 2025 723rd Andrey2001 502 132 629ms 27 Nov 2025 724th msbranicky 501 138 3ms 3 Oct 2024 725th webmiche 501 159 10ms 3 Nov 2025 726th blaztoma 🇱🇹 500 154 125ms 28 Nov 2025 727th jlangvand 499 141 2ms 15 Oct 2024 727th HumanoidCPU 499 141 1ms 7 Mar 2025 729th MeWhenI 🇻🇦 499 149 55ms 4 Oct 2024 730th janAkali 🇷🇺 499 167 357ms 8 Oct 2024 731st Mabeloid 🇳🇴 498 133 566ms 2 Oct 2024 732nd CheeseCake628 🇳🇴 498 160 102ms 5 Nov 2024 733rd osNiko 🇧🇷 496 73 50ms 11 days ago 734th pres-abhisheksinha 495 161 10ms 8 Oct 2024 735th HumanoidCPU 492 145 394ms 5 Oct 2024 736th CarterStroik 492 161 2ms 19 Nov 2025 737th ibixina 492 162 9ms 13 Oct 2024 737th TheAtrossian 492 162 10ms 5 Jan 2025 739th TheRealOhead 🇺🇸 491 131 14ms 1 Oct 2024 740th snoozingnewt 🇨🇦 490 150 154ms 2 Nov 2025 741st h-hh-hhh 🇺🇦 488 177 65ms 2 Nov 2024 742nd JunkIce 487 136 563ms 3 Dec 2024 743rd snoozingnewt 🇨🇦 487 249 26ms 2 Nov 2025 744th snoozingnewt 🇨🇦 486 117 904ms 2 Nov 2025 745th Vaekor 483 165 10ms 15 Dec 2024 746th snoozingnewt 🇨🇦 482 173 332ms 2 Nov 2025 747th alphafalfa 480 92 2ms 8 Nov 2024 748th mitzal 480 180 66ms 9 Feb 2025 749th h-hh-hhh 🇺🇦 479 147 2ms 2 Nov 2024 750th MiffOttah 476 150 423ms 6 Oct 2024 750th mwarvik 🇳🇴 476 150 421ms 7 days ago 752nd JesseNoEyes 🇺🇸 472 169 10ms 1 Oct 2024 753rd luca1339 471 198 371ms 4 Nov 2024 754th Maximizer02 471 201 10ms 1 Oct 2024 755th iczelia 🇩🇪 470 94 2ms 23 Sep 2025 756th ejini6969 469 102 37ms 14 Jun 2025 757th zyc-2024 🇨🇳 469 170 9ms 5 Oct 2024 758th ComputerKWasTaken 🇺🇸 466 171 10ms 14 Oct 2024 759th snoozingnewt 🇨🇦 466 200 228ms 2 Nov 2025 760th snoozingnewt 🇨🇦 464 121 222ms 27 Nov 2025 761st Jacob385 462 202 358ms 2 Oct 2024 762nd navier-1 461 173 11ms 22 Sep 2025 763rd snoozingnewt 🇨🇦 460 96 2ms 2 Nov 2025 764th madex 🇩🇪 460 104 39ms 2 Oct 2024 765th TheZwierzLF 🇵🇱 455 105 37ms 2 hours ago 766th snoozingnewt 🇨🇦 454 149 6ms 2 Nov 2025 767th IISResetMe 453 103 490ms 27 Nov 2025 768th clayboll99 453 176 10ms 10 Jul 2025 769th dokutan 451 63 3ms 26 Nov 2024 770th snoozingnewt 🇨🇦 450 176 2ms 2 Nov 2025 771st Upload-and-View 🇺🇦 450 177 17ms 9 Aug 2025 772nd varhammer 🇷🇺 450 223 11ms 23 Feb 2025 773rd OSYCh314 🇦🇺 448 178 10ms 2 Nov 2024 774th dokutan 445 109 10ms 19 Oct 2024 775th grey0ut 444 105 425ms 11 Jan 2025 776th calum12345 443 180 10ms 26 Mar 2025 777th MyXoToD 🇩🇪 441 146 9ms 26 May 2025 778th Yewzir 🇧🇪 440 171 12ms 26 Dec 2024 779th CheeseCake628 🇳🇴 439 151 497ms 18 Oct 2025 780th zt14427 438 182 10ms 27 Dec 2024 781st IoLimmer 435 183 9ms 10 Oct 2024 782nd JOrE20 🇺🇸 434 136 754ms 7 Dec 2025 783rd KatieLG 🇬🇧 433 183 2ms 2 Oct 2025 784th aksyristos 433 184 16ms 15 Nov 2024 785th snoozingnewt 🇨🇦 432 267 28ms 21 days ago 786th KatieLG 🇬🇧 431 108 6ms 13 Oct 2024 787th snoozingnewt 🇨🇦 431 111 34ms 2 Nov 2025 788th estomagordo 🇳🇱 428 186 10ms 15 Jul 2025 789th dokutan 425 132 313ms 3 Oct 2024 790th MeWhenI 🇻🇦 424 143 6ms 2 Oct 2024 791st Arkadios200 417 196 98ms 21 Oct 2025 792nd aksyristos 409 172 2ms 23 Nov 2025 793rd dieggsy 406 247 18ms 10 Oct 2024 794th snoozingnewt 🇨🇦 406 313 40ms 2 Nov 2025 795th Mabeloid 🇳🇴 405 159 13ms 12 Oct 2024 796th snoozingnewt 🇨🇦 404 223 75ms 2 Nov 2025 797th Ralac07 🇦🇺 397 162 11ms 3 Oct 2024 798th snoozingnewt 🇨🇦 392 276 40ms 6 Dec 2025 799th ehulinsky 🇺🇸 384 158 5ms 2 Apr 2025 800th fischfood 384 176 5ms 22 Oct 2024 First Prev 721–800 of 857 Next Last