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 ><> ALGOL 68 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 APL ArkScript Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> ALGOL 68 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 APL ArkScript Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily 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 801st dokutan 451 63 3ms 26 Nov 2024 802nd snoozingnewt 🇨🇦 451 176 2ms 2 Nov 2025 803rd muser-logiccpu 🇺🇦 450 177 18ms 9 Aug 2025 804th OSYCh314 🇦🇺 448 178 10ms 2 Nov 2024 805th dokutan 445 109 10ms 19 Oct 2024 806th grey0ut 444 105 472ms 11 Jan 2025 807th calum12345 443 180 10ms 26 Mar 2025 808th MyXoToD 🇩🇪 441 146 11ms 26 May 2025 809th Yewzir 🇧🇪 440 171 13ms 26 Dec 2024 810th CheeseCake628 🇳🇴 439 151 521ms 18 Oct 2025 811th zt14427 438 182 11ms 27 Dec 2024 812th IoLimmer 436 183 10ms 10 Oct 2024 813th varhammer 🇷🇺 435 223 11ms 23 Feb 2025 814th KatieLG 🇬🇧 433 183 2ms 2 Oct 2025 815th aksyristos 433 184 21ms 15 Nov 2024 816th KatieLG 🇬🇧 431 108 6ms 13 Oct 2024 817th snoozingnewt 🇨🇦 431 111 38ms 2 Nov 2025 818th estomagordo 🇳🇱 429 186 10ms 15 Jul 2025 819th dokutan 425 132 301ms 3 Oct 2024 820th JOrE20 424 136 1,020ms 7 Dec 2025 821st MeWhenI 🇻🇦 424 143 6ms 2 Oct 2024 822nd Arkadios200 417 196 98ms 21 Oct 2025 823rd aksyristos 411 172 2ms 23 Nov 2025 824th snoozingnewt 🇨🇦 411 267 29ms 18 Dec 2025 825th Mabeloid 🇳🇴 405 159 10ms 12 Oct 2024 826th snoozingnewt 🇨🇦 404 223 82ms 2 Nov 2025 827th Ralac07 🇦🇺 398 162 12ms 3 Oct 2024 828th dieggsy 393 247 18ms 10 Oct 2024 829th snoozingnewt 🇨🇦 392 276 40ms 6 Dec 2025 830th snoozingnewt 🇨🇦 388 313 40ms 2 Nov 2025 831st fischfood 385 176 4ms 22 Oct 2024 832nd JOrE20 385 191 109ms 25 days ago 833rd ehulinsky 🇺🇸 384 158 5ms 2 Apr 2025 834th c0d3-4-F00d 🇩🇪 384 184 2ms 9 Jan 2025 835th KatieLG 🇬🇧 375 218 108ms 21 Nov 2025 836th RobGLambert 375 232 1,019ms 8 Jun 2025 837th RedzGoose 🇦🇺 371 187 109ms 2 Oct 2024 838th P1nk-P0nk 369 215 3ms 18 Oct 2024 839th gautambp 366 218 11ms 24 Jun 2025 840th snoozingnewt 🇨🇦 363 267 13ms 2 Nov 2025 841st sciencejiho 358 197 2ms 11 Feb 2025 842nd The-Wolfson 355 230 100ms 16 Dec 2024 843rd Zhenyu-Bo 350 228 11ms 30 Jul 2025 844th EthanJantz 347 230 11ms 5 Sep 2025 845th RobGLambert 342 273 201ms 8 Jun 2025 846th Ernest1338 339 275 274ms 26 Oct 2024 847th noahhorlacher 337 191 10ms 7 Dec 2024 848th RobertBurs 336 237 10ms 22 Sep 2025 849th TJK-S 331 241 11ms 25 Oct 2025 849th NoneTheFewer 331 241 11ms 25 Dec 2025 851st JOrE20 312 389 56ms 4 Dec 2025 852nd te-chnical 309 258 219ms 4 May 2025 853rd snoozingnewt 🇨🇦 303 200 4ms 2 Nov 2025 854th KatieLG 🇬🇧 300 290 2,116ms 1 Oct 2025 855th kasarino 294 240 2ms 13 days ago 856th KatieLG 🇬🇧 293 241 2ms 1 Oct 2025 857th ReterikHub 280 310 199ms 17 Jan 2025 858th Mikey-Beep 🇬🇧 273 349 17ms 12 Aug 2025 859th MeWhenI 🇻🇦 272 407 119ms 6 Oct 2024 860th arebbsba 269 296 11ms 9 Jan 2025 861st kasarino 267 299 11ms 13 days ago 862nd kasarino 258 373 44ms 13 days ago 863rd benanlam 249 320 10ms 21 Dec 2025 864th Msleizak 🇫🇷 206 226 280ms 19 May 2025 865th theEsteemed 154 606 472ms 20 Jan 2026 866th AidanWalter 148 540 10ms 1 Jan 2025 867th bignamehyp 120 667 10ms 14 Nov 2024 868th vkptimon 120 776 422ms 9 Jul 2025 869th dokutan 61 2,475 116ms 18 Aug 2025 870th iczelia 🇩🇪 52 2,045 4ms 14 Oct 2025 871st lyphyser 0 15 33ms 25 May 2025 871st 2bular 0 15 32ms 7 days ago 871st Natanaelel 🇸🇪 0 15 35ms 4 days ago 874th darrenks 🇺🇸 0 16 33ms 7 days ago 875th plcc0 0 18 35ms 7 days ago 876th namelessiw 0 21 150ms 19 Nov 2025 877th kg583 🇺🇸 0 25 271ms 8 Feb 2025 878th lyxal 🇦🇺 0 27 761ms 17 May 2025 879th plcc0 0 30 97ms 21 days ago 880th themoonisacheese 0 35 748ms 13 Jun 2025 First Prev 801–880 of 900 Next Last