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 clayboll99 453 176 10ms 10 Jul 2025 802nd snoozingnewt 🇨🇦 452 96 2ms 2 Nov 2025 803rd dokutan 451 63 3ms 26 Nov 2024 804th snoozingnewt 🇨🇦 451 176 2ms 2 Nov 2025 805th muser-logiccpu 🇺🇦 450 177 18ms 9 Aug 2025 806th OSYCh314 🇦🇺 448 178 10ms 2 Nov 2024 807th dokutan 445 109 10ms 19 Oct 2024 808th grey0ut 444 105 472ms 11 Jan 2025 809th calum12345 443 180 10ms 26 Mar 2025 810th MyXoToD 🇩🇪 441 146 12ms 26 May 2025 811th Yewzir 🇧🇪 440 171 13ms 26 Dec 2024 812th CheeseCake628 🇳🇴 439 151 521ms 18 Oct 2025 813th zt14427 438 182 11ms 27 Dec 2024 814th IoLimmer 436 183 10ms 10 Oct 2024 815th varhammer 🇷🇺 435 223 11ms 23 Feb 2025 816th KatieLG 🇬🇧 433 183 2ms 2 Oct 2025 817th aksyristos 433 184 21ms 15 Nov 2024 818th KatieLG 🇬🇧 431 108 6ms 13 Oct 2024 819th snoozingnewt 🇨🇦 431 111 38ms 2 Nov 2025 820th estomagordo 🇳🇱 429 186 10ms 15 Jul 2025 821st dokutan 425 132 301ms 3 Oct 2024 822nd JOrE20 424 136 1,020ms 7 Dec 2025 823rd MeWhenI 🇻🇦 424 143 6ms 2 Oct 2024 824th Arkadios200 417 196 98ms 21 Oct 2025 825th aksyristos 411 172 2ms 23 Nov 2025 826th snoozingnewt 🇨🇦 411 267 29ms 18 Dec 2025 827th Mabeloid 🇳🇴 405 159 10ms 12 Oct 2024 828th snoozingnewt 🇨🇦 404 223 82ms 2 Nov 2025 829th Ralac07 🇦🇺 398 162 15ms 3 Oct 2024 830th dieggsy 393 247 18ms 10 Oct 2024 831st snoozingnewt 🇨🇦 392 276 40ms 6 Dec 2025 832nd snoozingnewt 🇨🇦 388 313 40ms 2 Nov 2025 833rd fischfood 385 176 4ms 22 Oct 2024 834th JOrE20 385 191 109ms 27 Jan 2026 835th ehulinsky 🇺🇸 384 158 5ms 2 Apr 2025 836th c0d3-4-F00d 🇩🇪 384 184 2ms 9 Jan 2025 837th KatieLG 🇬🇧 375 218 108ms 21 Nov 2025 838th RobGLambert 375 232 1,323ms 8 Jun 2025 839th RedzGoose 🇦🇺 371 187 109ms 2 Oct 2024 840th P1nk-P0nk 369 215 3ms 18 Oct 2024 841st gautambp 366 218 11ms 24 Jun 2025 842nd snoozingnewt 🇨🇦 363 267 13ms 2 Nov 2025 843rd sciencejiho 358 197 2ms 11 Feb 2025 844th The-Wolfson 355 230 100ms 16 Dec 2024 845th Zhenyu-Bo 350 228 11ms 30 Jul 2025 846th EthanJantz 347 230 11ms 5 Sep 2025 847th RobGLambert 342 273 201ms 8 Jun 2025 848th Ernest1338 339 275 274ms 26 Oct 2024 849th noahhorlacher 337 191 10ms 7 Dec 2024 850th RobertBurs 336 237 10ms 22 Sep 2025 851st TJK-S 331 241 11ms 25 Oct 2025 851st NoneTheFewer 331 241 11ms 25 Dec 2025 853rd JOrE20 312 389 56ms 4 Dec 2025 854th te-chnical 309 258 219ms 4 May 2025 855th snoozingnewt 🇨🇦 303 200 4ms 2 Nov 2025 856th KatieLG 🇬🇧 300 290 2,557ms 1 Oct 2025 857th kasarino 294 240 2ms 17 days ago 858th KatieLG 🇬🇧 293 241 2ms 1 Oct 2025 859th ReterikHub 280 310 211ms 17 Jan 2025 860th Mikey-Beep 🇬🇧 273 349 17ms 12 Aug 2025 861st MeWhenI 🇻🇦 272 407 119ms 6 Oct 2024 862nd arebbsba 269 296 11ms 9 Jan 2025 863rd kasarino 267 299 11ms 17 days ago 864th kasarino 258 373 44ms 17 days ago 865th benanlam 249 320 10ms 21 Dec 2025 866th Msleizak 🇫🇷 206 226 280ms 19 May 2025 867th theEsteemed 154 606 472ms 20 Jan 2026 868th AidanWalter 148 540 10ms 1 Jan 2025 869th bignamehyp 120 667 10ms 14 Nov 2024 870th vkptimon 120 776 422ms 9 Jul 2025 871st dokutan 61 2,475 116ms 18 Aug 2025 872nd iczelia 🇩🇪 52 2,045 4ms 14 Oct 2025 873rd lyphyser 0 15 33ms 25 May 2025 873rd 2bular 0 15 32ms 11 days ago 873rd Natanaelel 🇸🇪 0 15 35ms 8 days ago 876th darrenks 🇺🇸 0 16 33ms 11 days ago 877th plcc0 0 18 35ms 11 days ago 878th namelessiw 0 21 150ms 19 Nov 2025 879th kg583 🇺🇸 0 25 271ms 8 Feb 2025 880th lyxal 🇦🇺 0 27 761ms 17 May 2025 First Prev 801–880 of 902 Next Last