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 Multitap Input 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 Multitap Input 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 751st madex 🇩🇪 459 104 34ms 2 Oct 2024 752nd snoozingnewt 🇨🇦 454 149 4ms 2 Nov 2025 753rd IISResetMe 453 103 460ms 12 days ago 754th clayboll99 453 176 10ms 10 Jul 2025 755th dokutan 451 63 3ms 26 Nov 2024 756th snoozingnewt 🇨🇦 451 176 1ms 2 Nov 2025 757th Upload-and-View 🇺🇦 450 177 17ms 9 Aug 2025 758th varhammer 🇷🇺 450 223 11ms 23 Feb 2025 759th OSYCh314 🇦🇺 448 178 10ms 2 Nov 2024 760th dokutan 445 109 10ms 19 Oct 2024 761st grey0ut 444 105 415ms 11 Jan 2025 762nd calum12345 443 180 10ms 26 Mar 2025 763rd MyXoToD 🇩🇪 441 146 9ms 26 May 2025 764th Yewzir 🇧🇪 440 171 11ms 26 Dec 2024 765th CheeseCake628 🇳🇴 439 151 426ms 18 Oct 2025 766th zt14427 438 182 10ms 27 Dec 2024 767th IoLimmer 435 183 9ms 10 Oct 2024 768th JOrE20 🇺🇸 434 136 754ms 43 hours ago 769th KatieLG 🇬🇧 433 183 1ms 2 Oct 2025 770th aksyristos 433 184 16ms 15 Nov 2024 771st KatieLG 🇬🇧 431 108 6ms 13 Oct 2024 772nd snoozingnewt 🇨🇦 430 111 33ms 2 Nov 2025 773rd estomagordo 🇳🇱 428 186 10ms 15 Jul 2025 774th snoozingnewt 🇨🇦 426 268 28ms 2 Nov 2025 775th dokutan 425 132 288ms 3 Oct 2024 776th MeWhenI 🇻🇦 424 143 6ms 2 Oct 2024 777th Arkadios200 417 196 92ms 21 Oct 2025 778th aksyristos 409 172 2ms 15 days ago 779th dieggsy 406 247 18ms 10 Oct 2024 780th snoozingnewt 🇨🇦 406 313 43ms 2 Nov 2025 781st Mabeloid 🇳🇴 405 159 9ms 12 Oct 2024 782nd snoozingnewt 🇨🇦 404 223 75ms 2 Nov 2025 783rd Ralac07 🇦🇺 397 162 11ms 3 Oct 2024 784th snoozingnewt 🇨🇦 392 276 43ms 2 days ago 785th ehulinsky 🇺🇸 384 158 5ms 2 Apr 2025 786th fischfood 384 176 4ms 22 Oct 2024 787th c0d3-4-F00d 🇩🇪 382 184 2ms 9 Jan 2025 788th snoozingnewt 🇨🇦 376 267 13ms 2 Nov 2025 789th KatieLG 🇬🇧 375 218 144ms 17 days ago 790th RobGLambert 371 232 913ms 8 Jun 2025 791st RedzGoose 🇦🇺 369 187 96ms 2 Oct 2024 792nd P1nk-P0nk 369 215 3ms 18 Oct 2024 793rd gautambp 365 218 11ms 24 Jun 2025 794th sciencejiho 357 197 2ms 11 Feb 2025 795th The-Wolfson 355 230 102ms 16 Dec 2024 796th JOrE20 🇺🇸 354 208 120ms 43 hours ago 797th Zhenyu-Bo 349 228 10ms 30 Jul 2025 798th EthanJantz 346 230 10ms 5 Sep 2025 799th RobGLambert 342 273 333ms 8 Jun 2025 800th Ernest1338 339 275 382ms 26 Oct 2024 801st noahhorlacher 337 191 9ms 7 Dec 2024 802nd RobertBurs 336 237 10ms 22 Sep 2025 803rd TJK-S 331 241 10ms 25 Oct 2025 804th JOrE20 🇺🇸 312 389 56ms 4 days ago 805th te-chnical 309 258 215ms 4 May 2025 806th snoozingnewt 🇨🇦 303 200 3ms 2 Nov 2025 807th KatieLG 🇬🇧 297 290 1,763ms 1 Oct 2025 808th KatieLG 🇬🇧 292 241 2ms 1 Oct 2025 809th ReterikHub 278 310 199ms 17 Jan 2025 810th Mikey-Beep 🇬🇧 273 349 14ms 12 Aug 2025 811th MeWhenI 🇻🇦 271 407 119ms 6 Oct 2024 812th arebbsba 269 296 10ms 9 Jan 2025 813th Msleizak 🇫🇷 206 226 243ms 19 May 2025 814th AidanWalter 148 540 10ms 1 Jan 2025 815th vkptimon 120 776 415ms 9 Jul 2025 816th bignamehyp 119 667 13ms 14 Nov 2024 817th dokutan 61 2,475 119ms 18 Aug 2025 818th iczelia 🇩🇪 52 2,045 4ms 14 Oct 2025 819th lyphyser 0 15 71ms 25 May 2025 820th 2bular 0 16 69ms 22 Mar 2025 821st darrenks 0 17 72ms 22 Mar 2025 822nd Natanaelel 🇸🇪 0 18 77ms 23 Mar 2025 823rd plcc0 0 21 80ms 4 Apr 2025 823rd namelessiw 0 21 150ms 19 days ago 825th kg583 🇺🇸 0 25 263ms 8 Feb 2025 First Prev 751–825 of 841 Next Last