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 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 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 Ernest1338 341 275 297ms 26 Oct 2024 882nd noahhorlacher 338 191 15ms 7 Dec 2024 883rd RobertBurs 337 237 11ms 22 Sep 2025 884th jusaka 331 216 400ms 8 hours ago 885th TJK-S 331 241 12ms 25 Oct 2025 885th NoneTheFewer 331 241 11ms 25 Dec 2025 887th jusaka 325 150 12ms 5 hours ago 888th JOrE20 316 389 56ms 4 Dec 2025 889th te-chnical 309 258 222ms 4 May 2025 890th snoozingnewt 🇨🇦 303 200 4ms 2 Nov 2025 891st KatieLG 🇬🇧 300 290 2,606ms 1 Oct 2025 892nd kasarino 295 240 2ms 8 Feb 2026 893rd KatieLG 🇬🇧 294 241 2ms 1 Oct 2025 894th jusaka 290 234 108ms 8 hours ago 895th jusaka 289 275 2ms 10 hours ago 896th fantaize 284 330 201ms 10 Mar 2026 897th ReterikHub 281 310 210ms 17 Jan 2025 898th jusaka 275 243 2,488ms 8 hours ago 899th jusaka 275 435 391ms 9 hours ago 900th Mikey-Beep 🇬🇧 273 349 16ms 12 Aug 2025 901st MeWhenI 🇻🇦 272 407 119ms 6 Oct 2024 902nd arebbsba 269 296 10ms 9 Jan 2025 903rd kasarino 267 299 11ms 8 Feb 2026 904th jusaka 261 205 10ms 4 hours ago 905th jusaka 261 271 3ms 9 hours ago 906th kasarino 260 373 44ms 8 Feb 2026 907th benanlam 249 320 12ms 21 Dec 2025 908th jusaka 249 336 399ms 8 hours ago 909th jusaka 243 421 4ms 6 hours ago 910th jusaka 242 507 29ms 6 hours ago 911th jusaka 239 309 204ms 7 hours ago 912th jusaka 233 388 110ms 8 hours ago 913th jusaka 230 309 5ms 5 hours ago 914th jusaka 227 361 148ms 8 hours ago 915th jusaka 224 254 1,457ms 7 hours ago 916th jusaka 223 163 63ms 3 hours ago 917th jusaka 216 446 25ms 5 hours ago 918th jusaka 213 225 38ms 11 hours ago 919th jusaka 212 575 45ms 5 hours ago 920th jusaka 211 390 188ms 7 hours ago 921st jusaka 207 189 34ms 2 hours ago 922nd Msleizak 🇫🇷 206 226 262ms 19 May 2025 923rd jusaka 199 556 29ms 7 hours ago 924th jusaka 194 467 1,371ms 8 hours ago 925th jusaka 192 488 224ms 9 hours ago 926th jusaka 185 366 6ms 8 hours ago 927th jusaka 184 307 249ms 8 hours ago 928th jusaka 180 387 139ms 8 hours ago 929th jusaka 177 365 11ms 11 hours ago 930th jusaka 172 337 1,983ms 7 hours ago 931st jusaka 172 450 131ms 7 hours ago 932nd jusaka 170 512 1,466ms 9 hours ago 933rd jusaka 169 985 1,436ms 6 hours ago 934th jusaka 167 568 13ms 7 hours ago 935th jusaka 161 246 4ms 10 hours ago 936th jusaka 156 244 140ms 5 hours ago 937th theEsteemed 154 606 407ms 20 Jan 2026 938th AidanWalter 148 540 11ms 1 Jan 2025 939th jusaka 146 744 46ms 6 hours ago 940th bignamehyp 120 667 11ms 14 Nov 2024 941st vkptimon 120 776 422ms 9 Jul 2025 942nd jusaka 116 643 8ms 4 hours ago 943rd dokutan 61 2,475 120ms 18 Aug 2025 944th iczelia 🇩🇪 52 2,045 4ms 14 Oct 2025 945th lyphyser 0 15 32ms 25 May 2025 945th 2bular 0 15 34ms 14 Feb 2026 945th Natanaelel 🇸🇪 0 15 34ms 17 Feb 2026 948th darrenks 🇺🇸 0 16 33ms 14 Feb 2026 949th plcc0 0 18 35ms 14 Feb 2026 950th namelessiw 0 21 150ms 19 Nov 2025 951st kg583 🇺🇸 0 25 298ms 8 Feb 2025 952nd lyxal 🇦🇺 0 27 775ms 17 May 2025 953rd plcc0 0 30 97ms 31 Jan 2026 954th themoonisacheese 0 35 874ms 13 Jun 2025 954th jshholland 0 35 779ms 19 Feb 2026 956th ovs-code 🇩🇪 0 52 4ms 24 Jan 2026 957th GrayJoKing 🇦🇺 0 55 3ms 13 Jul 2025 958th ovs-code 🇩🇪 0 58 3ms 13 Jul 2025 959th AlephSquirrel 0 63 3ms 15 Jun 2025 960th DialFrost 🇸🇬 0 68 11ms 4 Dec 2025 First Prev 881–960 of 984 Next 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