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 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) 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 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 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) 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 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 nephila-nacrea 🇬🇧 511 77 3ms 2 Oct 2024 722nd travisdoesmath 511 156 11ms 7 Sep 2025 722nd Shotokhan 511 156 10ms 21 Sep 2025 724th KatieLG 🇬🇧 510 140 440ms 1 Oct 2024 725th yoshykai 510 183 403ms 12 Apr 2025 726th Chinay-Domitrix 🇺🇸 509 131 4,351ms 30 Mar 2025 727th KatieLG 🇬🇧 509 146 8ms 2 Oct 2024 728th dokutan 508 116 1,074ms 30 Aug 2025 729th lhulinsky 508 157 10ms 21 Oct 2024 730th dokutan 507 126 143ms 22 Jun 2025 731st ThatAlo 504 158 10ms 9 Dec 2024 732nd osNiko 🇧🇷 503 72 51ms 24 days ago 733rd snoozingnewt 🇨🇦 503 142 463ms 2 Nov 2025 734th msbranicky 501 138 3ms 3 Oct 2024 735th webmiche 501 159 12ms 3 Nov 2025 736th jlangvand 500 141 2ms 15 Oct 2024 736th HumanoidCPU 500 141 1ms 7 Mar 2025 738th blaztoma 🇱🇹 500 154 109ms 28 Nov 2025 739th MeWhenI 🇻🇦 499 149 56ms 4 Oct 2024 740th janAkali 🇷🇺 499 167 357ms 8 Oct 2024 741st Mabeloid 🇳🇴 498 133 538ms 2 Oct 2024 742nd CheeseCake628 🇳🇴 498 160 104ms 5 Nov 2024 743rd pres-abhisheksinha 495 161 10ms 8 Oct 2024 744th HumanoidCPU 492 145 479ms 5 Oct 2024 745th CarterStroik 492 161 2ms 19 Nov 2025 746th ibixina 492 162 11ms 13 Oct 2024 746th TheAtrossian 492 162 11ms 5 Jan 2025 748th TheRealOhead 🇺🇸 491 131 10ms 1 Oct 2024 749th snoozingnewt 🇨🇦 490 150 154ms 2 Nov 2025 750th h-hh-hhh 🇺🇦 489 177 59ms 2 Nov 2024 751st JunkIce 487 136 510ms 3 Dec 2024 752nd snoozingnewt 🇨🇦 487 249 26ms 2 Nov 2025 753rd snoozingnewt 🇨🇦 486 117 1,338ms 2 Nov 2025 754th Vaekor 483 165 11ms 15 Dec 2024 755th snoozingnewt 🇨🇦 482 173 332ms 2 Nov 2025 756th mitzal 481 180 61ms 9 Feb 2025 757th h-hh-hhh 🇺🇦 479 147 2ms 2 Nov 2024 757th isaiah0311 🇺🇸 479 147 2ms 3 days ago 759th MiffOttah 476 150 457ms 6 Oct 2024 759th mwarvik 🇳🇴 476 150 450ms 1 Jan 2026 761st alphafalfa 472 92 2ms 8 Nov 2024 762nd JesseNoEyes 🇺🇸 472 169 12ms 1 Oct 2024 763rd luca1339 472 198 425ms 4 Nov 2024 764th Maximizer02 471 201 11ms 1 Oct 2024 765th ejini6969 469 102 37ms 14 Jun 2025 766th zyc-2024 🇨🇳 469 170 10ms 5 Oct 2024 767th ComputerKWasTaken 🇺🇸 466 171 10ms 14 Oct 2024 768th snoozingnewt 🇨🇦 466 200 216ms 2 Nov 2025 769th snoozingnewt 🇨🇦 464 121 197ms 27 Nov 2025 770th iczelia 🇩🇪 462 94 2ms 23 Sep 2025 771st Jacob385 462 202 418ms 2 Oct 2024 772nd navier-1 461 173 10ms 22 Sep 2025 773rd madex 🇩🇪 460 104 38ms 2 Oct 2024 774th TheZwierzLF 🇵🇱 455 105 38ms 26 days ago 775th snoozingnewt 🇨🇦 454 149 4ms 2 Nov 2025 776th IISResetMe 453 103 590ms 27 Nov 2025 777th clayboll99 453 176 10ms 10 Jul 2025 778th snoozingnewt 🇨🇦 452 96 2ms 2 Nov 2025 779th dokutan 451 63 3ms 26 Nov 2024 780th snoozingnewt 🇨🇦 450 176 2ms 2 Nov 2025 781st muser-logiccpu 🇺🇦 450 177 18ms 9 Aug 2025 782nd OSYCh314 🇦🇺 448 178 11ms 2 Nov 2024 783rd dokutan 445 109 10ms 19 Oct 2024 784th grey0ut 444 105 472ms 11 Jan 2025 785th calum12345 443 180 10ms 26 Mar 2025 786th varhammer 🇷🇺 443 223 11ms 23 Feb 2025 787th MyXoToD 🇩🇪 441 146 9ms 26 May 2025 788th Yewzir 🇧🇪 440 171 13ms 26 Dec 2024 789th CheeseCake628 🇳🇴 439 151 521ms 18 Oct 2025 790th zt14427 438 182 11ms 27 Dec 2024 791st IoLimmer 436 183 10ms 10 Oct 2024 792nd JOrE20 434 136 1,021ms 7 Dec 2025 793rd KatieLG 🇬🇧 433 183 2ms 2 Oct 2025 794th aksyristos 433 184 24ms 15 Nov 2024 795th KatieLG 🇬🇧 431 108 6ms 13 Oct 2024 796th snoozingnewt 🇨🇦 431 111 38ms 2 Nov 2025 797th estomagordo 🇳🇱 428 186 10ms 15 Jul 2025 798th snoozingnewt 🇨🇦 426 267 28ms 18 Dec 2025 799th dokutan 425 132 302ms 3 Oct 2024 800th MeWhenI 🇻🇦 424 143 6ms 2 Oct 2024 First Prev 721–800 of 873 Next Last