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 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 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 Calendar 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 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 Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 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 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 Calendar 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 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 751st aksyristos 409 172 2ms 10 days ago 752nd webmiche 406 159 11ms 3 Nov 2025 753rd dieggsy 406 247 21ms 10 Oct 2024 754th Mabeloid 🇳🇴 405 159 9ms 12 Oct 2024 755th CheeseCake628 🇳🇴 404 160 100ms 5 Nov 2024 756th snoozingnewt 🇨🇦 404 223 75ms 2 Nov 2025 757th pres-abhisheksinha 401 161 11ms 8 Oct 2024 758th ibixina 399 162 9ms 13 Oct 2024 758th TheAtrossian 399 162 10ms 5 Jan 2025 760th Ralac07 🇦🇺 397 162 11ms 3 Oct 2024 761st Maximizer02 396 201 10ms 1 Oct 2024 762nd Vaekor 391 165 12ms 15 Dec 2024 763rd ehulinsky 🇺🇸 384 158 5ms 2 Apr 2025 764th fischfood 384 176 4ms 22 Oct 2024 765th JesseNoEyes 🇺🇸 382 169 9ms 1 Oct 2024 766th c0d3-4-F00d 🇩🇪 382 184 2ms 9 Jan 2025 767th CheeseCake628 🇳🇴 381 151 462ms 18 Oct 2025 768th zyc-2024 🇨🇳 380 170 10ms 5 Oct 2024 769th snoozingnewt 🇨🇦 379 286 41ms 2 Nov 2025 770th ComputerKWasTaken 🇺🇸 378 171 9ms 14 Oct 2024 771st snoozingnewt 🇨🇦 376 267 13ms 2 Nov 2025 772nd KatieLG 🇬🇧 375 218 112ms 12 days ago 773rd navier-1 373 173 9ms 22 Sep 2025 774th snoozingnewt 🇨🇦 372 313 45ms 2 Nov 2025 775th RobGLambert 370 232 913ms 8 Jun 2025 776th RedzGoose 🇦🇺 369 187 96ms 2 Oct 2024 777th P1nk-P0nk 369 215 3ms 18 Oct 2024 778th clayboll99 367 176 10ms 10 Jul 2025 779th Upload-and-View 🇺🇦 365 177 16ms 9 Aug 2025 780th OSYCh314 🇦🇺 363 178 11ms 2 Nov 2024 781st calum12345 359 180 10ms 26 Mar 2025 782nd sciencejiho 357 197 2ms 11 Feb 2025 783rd zt14427 355 182 10ms 27 Dec 2024 784th The-Wolfson 355 230 98ms 16 Dec 2024 785th IoLimmer 353 183 9ms 10 Oct 2024 786th aksyristos 351 184 17ms 15 Nov 2024 787th estomagordo 🇳🇱 347 186 10ms 15 Jul 2025 788th RobGLambert 342 273 200ms 8 Jun 2025 789th Ernest1338 339 275 275ms 26 Oct 2024 790th noahhorlacher 337 191 9ms 7 Dec 2024 791st snoozingnewt 🇨🇦 303 200 3ms 2 Nov 2025 792nd gautambp 296 218 10ms 24 Jun 2025 793rd KatieLG 🇬🇧 296 290 1,813ms 1 Oct 2025 794th KatieLG 🇬🇧 292 241 2ms 1 Oct 2025 795th Zhenyu-Bo 283 228 10ms 30 Jul 2025 796th EthanJantz 281 230 10ms 5 Sep 2025 797th ReterikHub 277 310 199ms 17 Jan 2025 798th Mikey-Beep 🇬🇧 273 349 14ms 12 Aug 2025 799th RobertBurs 272 237 9ms 22 Sep 2025 800th MeWhenI 🇻🇦 271 407 132ms 6 Oct 2024 801st TJK-S 268 241 11ms 25 Oct 2025 802nd te-chnical 250 258 198ms 4 May 2025 803rd arebbsba 218 296 11ms 9 Jan 2025 804th Msleizak 🇫🇷 206 226 243ms 19 May 2025 805th AidanWalter 120 540 10ms 1 Jan 2025 806th vkptimon 120 776 307ms 9 Jul 2025 807th bignamehyp 97 667 10ms 14 Nov 2024 808th dokutan 60 2,474 123ms 18 Aug 2025 809th iczelia 🇩🇪 52 2,045 4ms 14 Oct 2025 810th lyphyser 0 15 80ms 25 May 2025 811th 2bular 0 16 76ms 22 Mar 2025 811th namelessiw 0 16 141ms 14 days ago 813th darrenks 0 17 78ms 22 Mar 2025 814th Natanaelel 🇸🇪 0 18 74ms 23 Mar 2025 814th lyxal 🇦🇺 0 18 498ms 17 May 2025 814th themoonisacheese 0 18 484ms 13 Jun 2025 817th kg583 🇺🇸 0 20 272ms 14 May 2025 818th plcc0 0 21 99ms 4 Apr 2025 819th ovs-code 🇩🇪 0 37 3ms 13 Jul 2025 820th maweowo 🇩🇪 0 39 4ms 2 Oct 2025 821st ovs-code 🇩🇪 0 40 4ms 9 Jul 2025 822nd AlephSquirrel 0 43 3ms 15 Jun 2025 823rd evnu 0 44 4ms 12 Oct 2025 824th ovs-code 🇩🇪 0 51 16ms 13 Jun 2025 825th GrayJoKing 🇦🇺 0 55 3ms 13 Jul 2025 First Prev 751–825 of 831 Next Last