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 grey0ut 444 105 472ms 11 Jan 2025 802nd calum12345 443 180 10ms 26 Mar 2025 803rd MyXoToD 🇩🇪 441 146 11ms 26 May 2025 804th Yewzir 🇧🇪 440 171 13ms 26 Dec 2024 805th CheeseCake628 🇳🇴 439 151 521ms 18 Oct 2025 806th zt14427 438 182 11ms 27 Dec 2024 807th IoLimmer 436 183 10ms 10 Oct 2024 808th varhammer 🇷🇺 435 223 11ms 23 Feb 2025 809th KatieLG 🇬🇧 433 183 2ms 2 Oct 2025 810th aksyristos 433 184 21ms 15 Nov 2024 811th KatieLG 🇬🇧 431 108 6ms 13 Oct 2024 812th snoozingnewt 🇨🇦 431 111 38ms 2 Nov 2025 813th estomagordo 🇳🇱 429 186 10ms 15 Jul 2025 814th dokutan 425 132 301ms 3 Oct 2024 815th MeWhenI 🇻🇦 424 143 6ms 2 Oct 2024 816th JOrE20 423 136 1,020ms 7 Dec 2025 817th Arkadios200 417 196 98ms 21 Oct 2025 818th aksyristos 411 172 2ms 23 Nov 2025 819th snoozingnewt 🇨🇦 411 267 29ms 18 Dec 2025 820th Mabeloid 🇳🇴 405 159 10ms 12 Oct 2024 821st snoozingnewt 🇨🇦 404 223 82ms 2 Nov 2025 822nd Ralac07 🇦🇺 397 162 12ms 3 Oct 2024 823rd dieggsy 393 247 18ms 10 Oct 2024 824th snoozingnewt 🇨🇦 392 276 40ms 6 Dec 2025 825th snoozingnewt 🇨🇦 388 313 40ms 2 Nov 2025 826th fischfood 385 176 4ms 22 Oct 2024 827th JOrE20 385 191 109ms 25 days ago 828th ehulinsky 🇺🇸 384 158 5ms 2 Apr 2025 829th c0d3-4-F00d 🇩🇪 384 184 2ms 9 Jan 2025 830th KatieLG 🇬🇧 375 218 108ms 21 Nov 2025 831st RobGLambert 375 232 1,019ms 8 Jun 2025 832nd RedzGoose 🇦🇺 371 187 109ms 2 Oct 2024 833rd P1nk-P0nk 369 215 3ms 18 Oct 2024 834th gautambp 366 218 11ms 24 Jun 2025 835th snoozingnewt 🇨🇦 363 267 13ms 2 Nov 2025 836th sciencejiho 358 197 2ms 11 Feb 2025 837th The-Wolfson 355 230 100ms 16 Dec 2024 838th Zhenyu-Bo 350 228 11ms 30 Jul 2025 839th EthanJantz 347 230 11ms 5 Sep 2025 840th RobGLambert 342 273 201ms 8 Jun 2025 841st Ernest1338 339 275 274ms 26 Oct 2024 842nd noahhorlacher 337 191 10ms 7 Dec 2024 843rd RobertBurs 336 237 10ms 22 Sep 2025 844th TJK-S 331 241 11ms 25 Oct 2025 844th NoneTheFewer 331 241 11ms 25 Dec 2025 846th JOrE20 312 389 56ms 4 Dec 2025 847th te-chnical 309 258 219ms 4 May 2025 848th snoozingnewt 🇨🇦 303 200 4ms 2 Nov 2025 849th KatieLG 🇬🇧 300 290 2,116ms 1 Oct 2025 850th kasarino 294 240 2ms 13 days ago 851st KatieLG 🇬🇧 293 241 2ms 1 Oct 2025 852nd ReterikHub 280 310 199ms 17 Jan 2025 853rd Mikey-Beep 🇬🇧 273 349 17ms 12 Aug 2025 854th MeWhenI 🇻🇦 272 407 119ms 6 Oct 2024 855th arebbsba 269 296 11ms 9 Jan 2025 856th kasarino 267 299 11ms 13 days ago 857th kasarino 258 373 44ms 13 days ago 858th benanlam 249 320 10ms 21 Dec 2025 859th Msleizak 🇫🇷 206 226 280ms 19 May 2025 860th theEsteemed 154 606 472ms 20 Jan 2026 861st AidanWalter 148 540 10ms 1 Jan 2025 862nd bignamehyp 120 667 10ms 14 Nov 2024 863rd vkptimon 120 776 422ms 9 Jul 2025 864th dokutan 61 2,475 116ms 18 Aug 2025 865th iczelia 🇩🇪 52 2,045 4ms 14 Oct 2025 866th lyphyser 0 15 33ms 25 May 2025 866th 2bular 0 15 32ms 7 days ago 866th Natanaelel 🇸🇪 0 15 35ms 4 days ago 869th darrenks 🇺🇸 0 16 33ms 7 days ago 870th plcc0 0 18 35ms 6 days ago 871st namelessiw 0 21 150ms 19 Nov 2025 872nd kg583 🇺🇸 0 25 271ms 8 Feb 2025 873rd lyxal 🇦🇺 0 27 761ms 17 May 2025 874th plcc0 0 30 97ms 21 days ago 875th themoonisacheese 0 35 748ms 13 Jun 2025 875th jshholland 0 35 1,111ms 2 days ago 877th ovs-code 🇩🇪 0 52 4ms 27 days ago 878th GrayJoKing 🇦🇺 0 55 4ms 13 Jul 2025 879th ovs-code 🇩🇪 0 58 3ms 13 Jul 2025 880th AlephSquirrel 0 63 4ms 15 Jun 2025 First Prev 801–880 of 895 Next Last