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 Continued Fractions 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 Gray Code Decoder Gray Code Encoder 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Dragon Curve Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript 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 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 ArkScript 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 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 Continued Fractions 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 Gray Code Decoder Gray Code Encoder 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Dragon Curve Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 881st RedzGoose 🇦🇺 373 187 119ms 2 Oct 2024 882nd P1nk-P0nk 369 215 3ms 18 Oct 2024 883rd gautambp 366 218 11ms 24 Jun 2025 884th snoozingnewt 🇨🇦 362 267 13ms 2 Nov 2025 885th sciencejiho 359 197 2ms 11 Feb 2025 886th The-Wolfson 356 230 111ms 16 Dec 2024 887th Zhenyu-Bo 350 228 11ms 30 Jul 2025 888th EthanJantz 347 230 12ms 5 Sep 2025 889th RobGLambert 344 273 200ms 8 Jun 2025 890th Inbarw100 342 207 2ms 19 days ago 891st Ernest1338 341 275 276ms 26 Oct 2024 892nd noahhorlacher 338 191 12ms 7 Dec 2024 893rd RobertBurs 337 237 11ms 22 Sep 2025 894th jusaka 331 216 415ms 8 days ago 895th TJK-S 331 241 12ms 25 Oct 2025 895th NoneTheFewer 331 241 11ms 25 Dec 2025 897th jusaka 325 150 12ms 8 days ago 898th JOrE20 316 389 56ms 4 Dec 2025 899th te-chnical 309 258 222ms 4 May 2025 900th snoozingnewt 🇨🇦 305 200 4ms 2 Nov 2025 901st KatieLG 🇬🇧 300 290 2,515ms 1 Oct 2025 902nd kasarino 295 240 2ms 8 Feb 2026 903rd KatieLG 🇬🇧 294 241 2ms 1 Oct 2025 904th jusaka 290 234 87ms 8 days ago 905th jusaka 289 275 2ms 8 days ago 906th fantaize 284 330 204ms 10 Mar 2026 907th ReterikHub 281 310 215ms 17 Jan 2025 908th Mikey-Beep 🇬🇧 280 344 17ms 4 days ago 909th jusaka 275 243 2,802ms 8 days ago 910th jusaka 275 435 327ms 8 days ago 911th MeWhenI 🇻🇦 273 407 119ms 6 Oct 2024 912th jusaka 273 425 52ms 7 days ago 913th arebbsba 270 296 10ms 9 Jan 2025 914th kasarino 267 299 11ms 8 Feb 2026 915th jusaka 261 205 10ms 8 days ago 916th jusaka 261 271 3ms 8 days ago 917th kasarino 260 373 44ms 8 Feb 2026 918th jusaka 250 336 374ms 8 days ago 919th benanlam 249 320 12ms 21 Dec 2025 920th jusaka 243 421 3ms 8 days ago 921st jusaka 242 507 29ms 8 days ago 922nd jusaka 239 309 200ms 8 days ago 923rd jusaka 238 183 2ms 7 days ago 924th jusaka 234 414 4ms 7 days ago 925th jusaka 233 388 86ms 8 days ago 926th jusaka 230 309 4ms 8 days ago 927th jusaka 229 280 162ms 7 days ago 928th jusaka 227 361 120ms 8 days ago 929th jusaka 224 254 1,528ms 8 days ago 930th jusaka 223 163 63ms 7 days ago 931st jusaka 216 446 23ms 8 days ago 932nd jusaka 213 225 37ms 8 days ago 933rd jusaka 212 575 41ms 8 days ago 934th jusaka 211 390 177ms 8 days ago 935th jusaka 207 189 34ms 7 days ago 936th Msleizak 🇫🇷 207 226 241ms 19 May 2025 937th jusaka 199 556 29ms 8 days ago 938th jusaka 194 467 1,507ms 8 days ago 939th jusaka 192 488 201ms 8 days ago 940th jusaka 188 286 81ms 7 days ago 941st jusaka 187 250 235ms 7 days ago 942nd jusaka 186 449 7ms 7 days ago 943rd jusaka 185 329 5ms 7 days ago 944th jusaka 185 366 6ms 8 days ago 945th jusaka 184 307 244ms 8 days ago 946th jusaka 182 528 16ms 7 days ago 947th jusaka 180 387 121ms 8 days ago 948th jusaka 177 365 10ms 8 days ago 949th jusaka 172 337 853ms 8 days ago 950th jusaka 172 450 111ms 8 days ago 951st jusaka 170 512 1,477ms 8 days ago 952nd jusaka 169 985 1,260ms 8 days ago 953rd jusaka 168 415 3ms 7 days ago 954th jusaka 167 568 7ms 8 days ago 955th jusaka 161 246 3ms 8 days ago 956th jusaka 156 244 140ms 8 days ago 957th theEsteemed 154 606 407ms 20 Jan 2026 958th AidanWalter 148 540 11ms 1 Jan 2025 959th jusaka 146 744 44ms 8 days ago 960th jusaka 131 1,469 14ms 7 days ago First Prev 881–960 of 1,009 Next Last