Card Number Validation in all languages in chars. 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 ><> 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 ALGOL 68 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 ><> 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 ALGOL 68 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 Chars Time Submitted 801st KatieLG 🇬🇧 375 218 108ms 21 Nov 2025 802nd navier-1 374 173 10ms 22 Sep 2025 803rd c0d3-4-F00d 🇩🇪 374 184 2ms 9 Jan 2025 804th RobGLambert 374 232 1,019ms 8 Jun 2025 805th snoozingnewt 🇨🇦 372 313 40ms 2 Nov 2025 806th snoozingnewt 🇨🇦 370 267 13ms 2 Nov 2025 807th RedzGoose 🇦🇺 369 187 121ms 2 Oct 2024 808th P1nk-P0nk 369 215 3ms 18 Oct 2024 809th clayboll99 367 176 10ms 10 Jul 2025 810th muser-logiccpu 🇺🇦 365 177 18ms 9 Aug 2025 811th OSYCh314 🇦🇺 363 178 11ms 2 Nov 2024 812th calum12345 359 180 10ms 26 Mar 2025 813th zt14427 355 182 11ms 27 Dec 2024 814th The-Wolfson 355 230 100ms 16 Dec 2024 815th IoLimmer 353 183 10ms 10 Oct 2024 816th aksyristos 351 184 24ms 15 Nov 2024 817th sciencejiho 349 197 2ms 11 Feb 2025 818th estomagordo 🇳🇱 347 186 10ms 15 Jul 2025 819th RobGLambert 342 273 185ms 8 Jun 2025 820th Ernest1338 339 275 290ms 26 Oct 2024 821st noahhorlacher 337 191 11ms 7 Dec 2024 822nd denkyuu1 333 194 16ms 20 hours ago 823rd JOrE20 312 389 56ms 4 Dec 2025 824th snoozingnewt 🇨🇦 303 200 4ms 2 Nov 2025 825th KatieLG 🇬🇧 299 290 2,116ms 1 Oct 2025 826th gautambp 296 218 12ms 24 Jun 2025 827th kasarino 287 240 2ms 12 hours ago 828th KatieLG 🇬🇧 285 241 2ms 1 Oct 2025 829th Zhenyu-Bo 283 228 11ms 30 Jul 2025 830th EthanJantz 281 230 11ms 5 Sep 2025 831st ReterikHub 280 310 199ms 17 Jan 2025 832nd RobertBurs 273 237 10ms 22 Sep 2025 833rd Mikey-Beep 🇬🇧 273 349 14ms 12 Aug 2025 834th MeWhenI 🇻🇦 272 407 119ms 6 Oct 2024 835th TJK-S 268 241 11ms 25 Oct 2025 835th NoneTheFewer 268 241 11ms 25 Dec 2025 837th kasarino 258 373 45ms 11 hours ago 838th te-chnical 250 258 248ms 4 May 2025 839th arebbsba 218 296 11ms 9 Jan 2025 840th kasarino 216 299 11ms 9 hours ago 841st Msleizak 🇫🇷 206 226 325ms 19 May 2025 842nd benanlam 202 320 11ms 21 Dec 2025 843rd theEsteemed 154 606 472ms 19 days ago 844th AidanWalter 120 540 10ms 1 Jan 2025 845th vkptimon 120 776 422ms 9 Jul 2025 846th bignamehyp 97 667 11ms 14 Nov 2024 847th dokutan 60 2,474 116ms 18 Aug 2025 848th iczelia 🇩🇪 52 2,045 4ms 14 Oct 2025 849th lyphyser 0 15 79ms 25 May 2025 850th 2bular 0 16 77ms 22 Mar 2025 850th namelessiw 0 16 141ms 19 Nov 2025 852nd darrenks 0 17 74ms 22 Mar 2025 853rd Natanaelel 🇸🇪 0 18 75ms 23 Mar 2025 853rd lyxal 🇦🇺 0 18 666ms 17 May 2025 853rd themoonisacheese 0 18 748ms 13 Jun 2025 856th plcc0 0 19 88ms 6 days ago 857th kg583 🇺🇸 0 20 265ms 14 May 2025 858th plcc0 0 30 97ms 8 days ago 859th ovs-code 🇩🇪 0 37 3ms 13 Jul 2025 860th maweowo 🇩🇪 0 39 4ms 2 Oct 2025 861st ovs-code 🇩🇪 0 40 5ms 9 Jul 2025 862nd AlephSquirrel 0 43 3ms 15 Jun 2025 862nd commandz0 🇺🇸 0 43 5ms 10 Jan 2026 864th evnu 0 44 5ms 12 Oct 2025 865th NicoBliss 0 47 9ms 11 Jan 2026 866th ovs-code 🇩🇪 0 51 16ms 13 Jun 2025 867th GrayJoKing 🇦🇺 0 55 3ms 13 Jul 2025 868th KatieLG 🇬🇧 0 56 4ms 10 Jan 2026 869th chunes3 🇺🇸 0 65 7ms 13 Feb 2025 870th DialFrost 🇸🇬 0 66 11ms 4 Dec 2025 871st sean-niemann 🇺🇸 0 68 58ms 30 Apr 2025 872nd dokutan 0 89 60ms 28 Jun 2025 873rd dokutan 0 99 63ms 8 hours ago 874th MatthewF19 0 108 108ms 17 May 2025 875th albanian-laundromat 0 123 2ms 4 Jun 2025 876th frankgraziano 0 129 7ms 24 hours ago 877th dokutan 0 138 8ms 11 Jan 2026 878th edsrzf 🇳🇿 0 142 183ms 24 Jul 2025 First Prev 801–878 of 878