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 dokutan 507 126 138ms 22 Jun 2025 722nd ThatAlo 504 158 10ms 9 Dec 2024 723rd snoozingnewt 🇨🇦 503 142 407ms 2 Nov 2025 724th Andrey2001 502 132 629ms 27 Nov 2025 725th msbranicky 501 138 3ms 3 Oct 2024 726th webmiche 501 159 10ms 3 Nov 2025 727th blaztoma 🇱🇹 500 154 125ms 28 Nov 2025 728th jlangvand 499 141 2ms 15 Oct 2024 728th HumanoidCPU 499 141 1ms 7 Mar 2025 730th MeWhenI 🇻🇦 499 149 69ms 4 Oct 2024 731st janAkali 🇷🇺 499 167 357ms 8 Oct 2024 732nd Mabeloid 🇳🇴 498 133 566ms 2 Oct 2024 733rd CheeseCake628 🇳🇴 498 160 102ms 5 Nov 2024 734th osNiko 🇧🇷 496 73 50ms 12 days ago 735th pres-abhisheksinha 495 161 10ms 8 Oct 2024 736th HumanoidCPU 492 145 394ms 5 Oct 2024 737th CarterStroik 492 161 2ms 19 Nov 2025 738th ibixina 492 162 9ms 13 Oct 2024 738th TheAtrossian 492 162 10ms 5 Jan 2025 740th TheRealOhead 🇺🇸 491 131 14ms 1 Oct 2024 741st snoozingnewt 🇨🇦 490 150 154ms 2 Nov 2025 742nd h-hh-hhh 🇺🇦 488 177 65ms 2 Nov 2024 743rd JunkIce 487 136 563ms 3 Dec 2024 744th snoozingnewt 🇨🇦 487 249 26ms 2 Nov 2025 745th snoozingnewt 🇨🇦 486 117 904ms 2 Nov 2025 746th Vaekor 483 165 10ms 15 Dec 2024 747th snoozingnewt 🇨🇦 482 173 332ms 2 Nov 2025 748th alphafalfa 480 92 2ms 8 Nov 2024 749th mitzal 480 180 66ms 9 Feb 2025 750th h-hh-hhh 🇺🇦 479 147 2ms 2 Nov 2024 751st MiffOttah 476 150 423ms 6 Oct 2024 751st mwarvik 🇳🇴 476 150 421ms 9 days ago 753rd JesseNoEyes 🇺🇸 472 169 10ms 1 Oct 2024 754th luca1339 471 198 371ms 4 Nov 2024 755th Maximizer02 471 201 10ms 1 Oct 2024 756th iczelia 🇩🇪 470 94 2ms 23 Sep 2025 757th ejini6969 469 102 37ms 14 Jun 2025 758th zyc-2024 🇨🇳 469 170 9ms 5 Oct 2024 759th ComputerKWasTaken 🇺🇸 466 171 10ms 14 Oct 2024 760th snoozingnewt 🇨🇦 466 200 228ms 2 Nov 2025 761st snoozingnewt 🇨🇦 464 121 222ms 27 Nov 2025 762nd Jacob385 462 202 358ms 2 Oct 2024 763rd navier-1 461 173 11ms 22 Sep 2025 764th snoozingnewt 🇨🇦 460 96 2ms 2 Nov 2025 765th madex 🇩🇪 460 104 39ms 2 Oct 2024 766th TheZwierzLF 🇵🇱 455 105 37ms 47 hours ago 767th snoozingnewt 🇨🇦 454 149 6ms 2 Nov 2025 768th IISResetMe 453 103 490ms 27 Nov 2025 769th clayboll99 453 176 10ms 10 Jul 2025 770th dokutan 451 63 3ms 26 Nov 2024 771st snoozingnewt 🇨🇦 450 176 2ms 2 Nov 2025 772nd Upload-and-View 🇺🇦 450 177 17ms 9 Aug 2025 773rd varhammer 🇷🇺 450 223 11ms 23 Feb 2025 774th OSYCh314 🇦🇺 448 178 10ms 2 Nov 2024 775th dokutan 445 109 10ms 19 Oct 2024 776th grey0ut 444 105 425ms 11 Jan 2025 777th calum12345 443 180 10ms 26 Mar 2025 778th MyXoToD 🇩🇪 441 146 9ms 26 May 2025 779th Yewzir 🇧🇪 440 171 12ms 26 Dec 2024 780th CheeseCake628 🇳🇴 439 151 497ms 18 Oct 2025 781st zt14427 438 182 10ms 27 Dec 2024 782nd IoLimmer 435 183 9ms 10 Oct 2024 783rd JOrE20 🇺🇸 434 136 754ms 7 Dec 2025 784th KatieLG 🇬🇧 433 183 2ms 2 Oct 2025 785th aksyristos 433 184 16ms 15 Nov 2024 786th snoozingnewt 🇨🇦 432 267 28ms 23 days ago 787th KatieLG 🇬🇧 431 108 6ms 13 Oct 2024 788th snoozingnewt 🇨🇦 431 111 34ms 2 Nov 2025 789th estomagordo 🇳🇱 428 186 10ms 15 Jul 2025 790th dokutan 425 132 313ms 3 Oct 2024 791st MeWhenI 🇻🇦 424 143 6ms 2 Oct 2024 792nd Arkadios200 417 196 98ms 21 Oct 2025 793rd aksyristos 409 172 2ms 23 Nov 2025 794th dieggsy 406 247 18ms 10 Oct 2024 795th snoozingnewt 🇨🇦 406 313 40ms 2 Nov 2025 796th Mabeloid 🇳🇴 405 159 13ms 12 Oct 2024 797th snoozingnewt 🇨🇦 404 223 119ms 2 Nov 2025 798th Ralac07 🇦🇺 397 162 11ms 3 Oct 2024 799th snoozingnewt 🇨🇦 392 276 40ms 6 Dec 2025 800th ehulinsky 🇺🇸 384 158 5ms 2 Apr 2025 First Prev 721–800 of 858 Next Last